[Event "Foxwoods op 16th"]
[Site "Ledyard"]
[Date "2024.03.31"]
[Round "8"]
[White "Kevlishvili, Robby"]
[Black "Matviishen, Viktor"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2524"]
[BlackElo "2561"]
[PlyCount "82"]
[EventDate "2024.03.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB14_2024"]
[SourceDate "2024.04.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Be7 8. Bc4 0-0 9. Bb3 Nc6 10. Bg5 Nd7 11. Bxe7 Qxe7 12. Nd5 Qd8 13. Qe2 Nc5 14. Rd1 Nxb3 15. axb3 f5 16. Ne3 fxe4 17. Qc4+ Kh8 18. Qxe4 Be6 19. 0-0 Rc8 20. Qd3 Rxf3 21. gxf3 Nd4 22. Kh1 Nxf3 23. Nf5 Qf6 24. Qxf3 Bxf5 25. Qxb7 Rf8 26. f3 Bxc2 27. Rd2 Bg6 28. Qc6 Bh5 29. Rdf2 g5 30. Kg1 a5 31. Rd1 Bxf3 32. Rxd6 Qf4 33. Qc4 e4 34. Qd4+ Kg8 35. Rd8 Rxd8 36. Qxd8+ Kg7 37. Qd7+ Kg6 38. Rd2 Qe3+ 39. Kf1 Bg2+ 40. Kxg2 Qf3+ 41. Kg1 Kh5 1-0

[Event "Foxwoods op 16th"]
[Site "Ledyard"]
[Date "2024.03.30"]
[Round "6"]
[White "Burke, John M"]
[Black "Matviishen, Viktor"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2574"]
[BlackElo "2561"]
[PlyCount "79"]
[EventDate "2024.03.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB14_2024"]
[SourceDate "2024.04.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. 0-0 a6 7. a4 h6 8. Re1 0-0 9. h3 Re8 10. Nbd2 Be6 11. Bxe6 Rxe6 12. b4 Ba7 13. Qc2 Qd7 14. Rb1 b5 15. Ra1 Rd8 16. Nb3 Bb6 17. Bd2 Ne7 18. axb5 axb5 19. c4 c6 20. Ra6 Qb7 21. Rea1 Nc8 22. c5 dxc5 23. bxc5 Bc7 24. Bc3 Ree8 25. Nbd2 Bb8 26. d4 exd4 27. Nxd4 b4 28. Bb2 Bf4 29. N2f3 Rxe4 30. Rxc6 Rde8 31. g3 Qd7 32. Kh2 Nd5 33. Rca6 Bc7 34. Rd1 Bxg3+ 35. Kxg3 Qc7+ 36. Kg2 Nf4+ 37. Kh1 Qb7 38. Qa4 Qd5 39. Ne6 Re1+ 40. Kh2 1-0

[Event "Foxwoods op 16th"]
[Site "Ledyard"]
[Date "2024.03.29"]
[Round "4"]
[White "Adewumi, Tanitoluwa"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "2351"]
[BlackElo "2561"]
[PlyCount "86"]
[EventDate "2024.03.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB14_2024"]
[SourceDate "2024.04.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 d6 4. d4 Bg4 5. h3 Bh5 6. d5 Nb8 7. Be3 Nf6 8. Bd3 Nbd7 9. Nbd2 Be7 10. c4 a5 11. a3 h6 12. Qa4 0-0 13. 0-0-0 b6 14. Rdg1 Nc5 15. Bxc5 bxc5 16. Bc2 Ra6 17. Ne1 Nd7 18. Qb3 Bg6 19. g3 c6 20. h4 cxd5 21. exd5 Rb6 22. Qa4 e4 23. Bxe4 Bf6 24. Bxg6 Bxb2+ 25. Kc2 fxg6 26. Nd3 Qf6 27. Nb1 Ne5 28. Rd1 Nf3 29. Rhe1 Ba1 30. Rc1 Nd4+ 31. Kd2 Rb2+ 32. Nxb2 Qxf2+ 33. Kd1 Qf3+ 34. Kd2 Bxb2 35. Rc3 Bxc3+ 36. Nxc3 Qf2+ 37. Kd1 Rf3 38. Re8+ Kh7 39. Ne2 Rd3+ 40. Kc1 Qe1+ 41. Kb2 Rd2+ 42. Kc3 Rxe2+ 43. Kd3 Qd2# 0-1

[Event "Foxwoods op 16th"]
[Site "Ledyard"]
[Date "2024.03.29"]
[Round "5"]
[White "Matviishen, Viktor"]
[Black "Ghaem Maghami, Ehsan"]
[Result "1/2-1/2"]
[ECO "D20"]
[WhiteElo "2561"]
[BlackElo "2473"]
[PlyCount "115"]
[EventDate "2024.03.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB14_2024"]
[SourceDate "2024.04.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.01"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. exd4 Nf6 6. Nf3 Bd6 7. Qe2+ Qe7 8. Qxe7+ Bxe7 9. 0-0 0-0 10. Re1 Bd6 11. Nc3 Nbd7 12. Bg5 a6 13. a4 b6 14. Nh4 Bb4 15. Re2 Bb7 16. Na2 Bd6 17. Nf5 Rfe8 18. Nxd6 cxd6 19. Rxe8+ Rxe8 20. Nc3 h6 21. Bf4 d5 22. Bd3 g5 23. Bd2 Ne4 24. Be1 Nf8 25. f3 Nf6 26. Bd2 Ne6 27. Ne2 Rc8 28. Kf2 Nh5 29. g3 a5 30. h4 Kg7 31. Rh1 Rh8 32. b3 Bc8 33. Rc1 Bd7 34. Bb5 Bxb5 35. axb5 gxh4 36. gxh4 Ra8 37. Rc6 a4 38. bxa4 Rxa4 39. Rxb6 Ra2 40. Ke3 Ra3+ 41. Bc3 Ng3 42. Rc6 Nxe2 43. Kxe2 Rb3 44. b6 Kf8 45. f4 Nxf4+ 46. Kd2 Ne6 47. Ba5 Ke7 48. Rc8 Kd7 49. Ra8 Kc6 50. Ra7 Rb5 51. Kc3 h5 52. Ra8 f5 53. Re8 Kd7 54. Rh8 f4 55. Rh7+ Kc6 56. Rh6 Kd7 57. Rh7+ Kc6 58. Rh6 1/2-1/2

[Event "Foxwoods op 16th"]
[Site "Ledyard"]
[Date "2024.03.28"]
[Round "2"]
[White "Ampie, Mauro"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "B25"]
[WhiteElo "2292"]
[BlackElo "2561"]
[PlyCount "84"]
[EventDate "2024.03.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB14_2024"]
[SourceDate "2024.04.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.01"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 a6 3. g3 Nc6 4. Bg2 g6 5. d3 Bg7 6. f4 d6 7. Nf3 Nf6 8. 0-0 0-0 9. h3 Rb8 10. g4 b5 11. Ne2 b4 12. Ng3 a5 13. c4 bxc3 14. bxc3 Nd7 15. Bd2 Rb2 16. Rb1 Qb6 17. Rxb2 Qxb2 18. Qb1 Bxc3 19. Bxc3 Qxc3 20. Ne2 Qa3 21. Rc1 Nb4 22. Rc3 Qxa2 23. Qxa2 Nxa2 24. Ra3 Nb4 25. Ne1 Ba6 26. Nc1 h6 27. Rxa5 g5 28. fxg5 hxg5 29. d4 f6 30. dxc5 Nxc5 31. e5 fxe5 32. Nf3 Nc6 33. Ra3 Nd4 34. Nxg5 Rb8 35. Kh2 Rb2 36. Kg3 Kg7 37. Rc3 Rb1 38. Kh4 Rb4 39. Ne4 Nce6 40. Ra3 Bb5 41. Nc3 Nf5+ 42. Kh5 Be8# 0-1

[Event "Foxwoods op 16th"]
[Site "Ledyard"]
[Date "2024.03.28"]
[Round "3"]
[White "Matviishen, Viktor"]
[Black "Deviprasath, Sharvesh"]
[Result "1/2-1/2"]
[ECO "D31"]
[WhiteElo "2561"]
[BlackElo "2381"]
[PlyCount "112"]
[EventDate "2024.03.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB14_2024"]
[SourceDate "2024.04.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.01"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. cxd5 exd5 5. Bf4 c6 6. e3 Bf5 7. Nge2 Nf6 8. Ng3 Bg6 9. h4 h6 10. h5 Bh7 11. Bd3 Bxd3 12. Qxd3 0-0 13. Nf5 Re8 14. g4 Ne4 15. f3 Nd6 16. Nxe7+ Qxe7 17. Kf2 Nd7 18. Rag1 f6 19. Ne2 Nf8 20. Ng3 Ne6 21. Bxd6 Qxd6 22. Nf5 Qd7 23. Rc1 Rec8 24. Rhe1 Re8 25. Re2 Ng5 26. b4 a5 27. b5 Re6 28. bxc6 bxc6 29. Rb1 Nf7 30. Reb2 Nd6 31. Rb8+ Re8 32. Nxh6+ gxh6 33. Qg6+ Qg7 34. Qxe8+ Nxe8 35. Rxa8 Qc7 36. Rxe8+ Kf7 37. Reb8 Qh2+ 38. Kf1 Qh1+ 39. Ke2 Qg2+ 40. Kd3 Qxf3 41. R1b7+ Ke6 42. Re8+ Kd6 43. Ree7 Qxg4 44. Kc3 Qc8 45. Kb3 Qf5 46. Ka4 Qc2+ 47. Kxa5 Qc3+ 48. Ka4 Qc2+ 49. Kb4 Qb2+ 50. Ka5 Qc3+ 51. Kb6 Qb4+ 52. Ka7 Qa5+ 53. Kb8 Qd8+ 54. Ka7 Qa5+ 55. Kb8 Qd8+ 56. Ka7 Qa5+ 1/2-1/2

[Event "Foxwoods op 16th"]
[Site "Ledyard"]
[Date "2024.03.27"]
[Round "1"]
[White "Matviishen, Viktor"]
[Black "Ubushiev, Andrey"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "2561"]
[BlackElo "2089"]
[PlyCount "59"]
[EventDate "2024.03.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB14_2024"]
[SourceDate "2024.04.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. e3 h6 7. Bh4 Be7 8. Bd3 Ne4 9. Bxe7 Qxe7 10. Bxe4 dxe4 11. Nge2 Bg4 12. Qc2 Bxe2 13. Kxe2 f5 14. Qb3 Qf7 15. g4 Qd7 16. Rhg1 fxg4 17. d5 c5 18. h3 gxh3 19. Nxe4 Na6 20. Qxb7 Qxb7 21. Nd6+ Kf8 22. Nxb7 Rb8 23. Nd6 Rxb2+ 24. Kf3 Nb4 25. Rad1 Ke7 26. Nf5+ Kf6 27. Nxg7 Ke5 28. Rg6 Rf8+ 29. Kg3 Rf6 30. f4+ 1-0

[Event "Pan American Intercollegiate-chT"]
[Site "McAllen"]
[Date "2024.01.07"]
[Round "6.7"]
[White "Matviishen, Viktor"]
[Black "Quesada Perez, Yasser"]
[Result "1/2-1/2"]
[ECO "D33"]
[WhiteElo "2555"]
[BlackElo "2578"]
[PlyCount "64"]
[EventDate "2024.01.04"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "CB02_2024"]
[SourceDate "2024.01.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.10"]
[SourceQuality "1"]
[WhiteTeam "Texas Tech Univ"]
[BlackTeam "Webster Univ"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "USA"]

1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 cxd4 8. Nxd4 Bc5 9. Nb3 Bb6 10. 0-0 d4 11. Na4 0-0 12. Bg5 h6 13. Bxf6 Qxf6 14. Nxb6 axb6 15. Bxc6 bxc6 16. Qxd4 Rd8 17. Qxb6 Ba6 18. Rfe1 Qxb2 19. Qxc6 Rdc8 20. Qe4 Re8 21. Qd4 Rxe2 22. Qxb2 Rxb2 23. Reb1 Rxb1+ 24. Rxb1 Bc4 25. Rb2 g5 26. f3 Kg7 27. Kf2 Kf6 28. Ke3 Ke5 29. Rc2 Bd5 30. f4+ gxf4+ 31. gxf4+ Kf6 32. Rd2 Be6 1/2-1/2

[Event "Pan American Intercollegiate-chT"]
[Site "McAllen"]
[Date "2024.01.06"]
[Round "4.3"]
[White "Matviishen, Viktor"]
[Black "Budisavljevic, Luka"]
[Result "1-0"]
[ECO "A70"]
[WhiteElo "2555"]
[BlackElo "2475"]
[PlyCount "53"]
[EventDate "2024.01.04"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "CB02_2024"]
[SourceDate "2024.01.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.10"]
[SourceQuality "1"]
[WhiteTeam "Texas Tech Univ"]
[BlackTeam "Missouri Univ"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "USA"]

1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. d5 exd5 5. cxd5 d6 6. e4 g6 7. h3 Bg7 8. Nf3 0-0 9. Be3 b5 10. e5 dxe5 11. Bxc5 Re8 12. Bxb5 Nbd7 13. Be3 Rb8 14. 0-0 a6 15. Bc6 Rxb2 16. Nd2 Rb8 17. Nc4 Qe7 18. Rb1 Rd8 19. Qa4 h6 20. Qa5 g5 21. Bc5 Nxc5 22. Rxb8 Nce4 23. Nxe4 Nxe4 24. d6 Nxd6 25. Nxd6 Qxd6 26. Bb7 Qd7 27. Qxd8+ 1-0

[Event "US Masters op"]
[Site "Charlotte"]
[Date "2023.11.26"]
[Round "9"]
[White "Matviishen, Viktor"]
[Black "Kunka, Harshid"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "2556"]
[BlackElo "2336"]
[PlyCount "83"]
[EventDate "2023.11.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB48_2023"]
[SourceDate "2023.11.29"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.29"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Qc7 6. h3 g6 7. Ne2 Bf5 8. Bxf5 gxf5 9. Ng3 e6 10. Nh5 0-0-0 11. 0-0 Be7 12. a4 Nf6 13. Bf4 Qd7 14. Nxf6 Bxf6 15. a5 a6 16. Nd2 Rhg8 17. b4 Rg6 18. b5 axb5 19. a6 bxa6 20. Rxa6 Qb7 21. Qa1 Kd7 22. Nb3 Be7 23. Nc5+ Bxc5 24. dxc5 Ke8 25. Rb6 Qc8 26. c4 bxc4 27. Qh8+ Kd7 28. Qxh7 Ke7 29. Qh4+ Kd7 30. Rfb1 e5 31. Bxe5 Nxe5 32. Rb7+ Kc6 33. Qe7 d4 34. R7b6+ Kd5 35. c6 Re6 36. R6b5+ Ke4 37. Qh4+ f4 38. Re1+ Kd3 39. Qh5 f3 40. Qf5+ Kd2 41. Rb2+ Kxe1 42. Qb1# 1-0

[Event "US Masters op"]
[Site "Charlotte"]
[Date "2023.11.26"]
[Round "8"]
[White "Wang, Jason"]
[Black "Matviishen, Viktor"]
[Result "1-0"]
[ECO "E15"]
[WhiteElo "2431"]
[BlackElo "2556"]
[PlyCount "143"]
[EventDate "2023.11.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB48_2023"]
[SourceDate "2023.11.29"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Be7 7. Bg2 c6 8. 0-0 d5 9. Bc3 0-0 10. Nbd2 Nbd7 11. Qc2 c5 12. dxc5 bxc5 13. e3 Qc7 14. Rfe1 Rac8 15. Rad1 Rfd8 16. Bb2 h6 17. h3 Bb7 18. Nh2 Ne5 19. e4 dxe4 20. Nxe4 Rxd1 21. Rxd1 Nxe4 22. Bxe4 Bf6 23. Bxb7 Qxb7 24. Qe2 Qc7 25. Rd2 Kf8 26. f4 Nd7 27. Bxf6 Nxf6 28. Nf3 Rd8 29. Qe5 Rc8 30. Qe3 Kg8 31. Ne5 Rd8 32. a3 a5 33. g4 Rd6 34. Kf1 Nd7 35. Nf3 Rxd2 36. Nxd2 Qc6 37. Qe4 Qd6 38. Ke2 Nb8 39. Qe3 Nc6 40. Ne4 Nd4+ 41. Kd3 Qd8 42. Kc3 Qb6 43. Nd2 f5 44. Qe5 Kh7 45. gxf5 exf5 46. h4 h5 47. Qe8 Qh6 48. b4 axb4+ 49. axb4 Ne6 50. bxc5 Qf6+ 51. Kc2 Nxf4 52. c6 Ne6 53. Qxh5+ Kg8 54. Qe8+ Kh7 55. Nf3 Nd4+ 56. Kd3 Nxf3 57. Qh5+ Kg8 58. Qxf3 Qa1 59. Qd5+ Kh8 60. c7 Qb1+ 61. Kc3 Qe1+ 62. Kc2 Qe2+ 63. Kb3 Qe3+ 64. Ka4 Qa7+ 65. Qa5 Qb7 66. Qc5 Qa6+ 67. Kb4 Qb7+ 68. Ka5 Qc8 69. Qd6 Kh7 70. Qd8 Qb7 71. c8Q Qa7+ 72. Kb5 1-0

[Event "US Masters op"]
[Site "Charlotte"]
[Date "2023.11.25"]
[Round "6"]
[White "Bellahcene, Bilel"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "B94"]
[WhiteElo "2502"]
[BlackElo "2556"]
[PlyCount "36"]
[EventDate "2023.11.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB48_2023"]
[SourceDate "2023.11.29"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.29"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. Bc4 Qb6 8. 0-0 Qc5 9. Bd5 e6 10. Re1 Ne5 11. Bxf6 gxf6 12. Re3 h5 13. b4 Qa7 14. Bb3 Bd7 15. Nce2 Rc8 16. c3 b5 17. a4 Qb7 18. axb5 axb5 1/2-1/2

[Event "US Masters op"]
[Site "Charlotte"]
[Date "2023.11.25"]
[Round "7"]
[White "Matviishen, Viktor"]
[Black "Daggupati, Balaji"]
[Result "1/2-1/2"]
[ECO "D10"]
[WhiteElo "2556"]
[BlackElo "2477"]
[PlyCount "118"]
[EventDate "2023.11.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB48_2023"]
[SourceDate "2023.11.29"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.29"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Bf4 Nf6 5. e3 Nc6 6. Bd3 Bg4 7. f3 Bh5 8. Qb3 Qd7 9. Nc3 e6 10. Rc1 Be7 11. Na4 0-0 12. Nc5 Bxc5 13. Rxc5 Qe7 14. Ne2 Bg6 15. Bg5 Bxd3 16. Qxd3 h6 17. Bh4 Ne5 18. Qc3 Nc4 19. e4 g5 20. Bg3 Rfc8 21. b3 Nb6 22. h4 dxe4 23. hxg5 Nfd5 24. Qc2 Qxg5 25. Qxe4 Nd7 26. Bd6 Nxc5 27. dxc5 Qg6 28. Qxg6+ fxg6 29. Rxh6 Kg7 30. Rh4 g5 31. Re4 Kf6 32. Nd4 Re8 33. Be5+ Ke7 34. Nb5 Rec8 35. Rg4 a6 36. Nd6 Rxc5 37. Rxg5 Kd7 38. Rg7+ Kc6 39. Nc4 Rb5 40. Bd4 Nb4 41. Ke2 Rd8 42. a4 Rh5 43. Be5 b5 44. Rc7+ Kd5 45. Bf6 Rg8 46. Ne3+ Kd6 47. Ra7 Kc6 48. a5 Rh2 49. Be5 Rhxg2+ 50. Nxg2 Rxg2+ 51. Kf1 Ra2 52. f4 Ra3 53. Rc7+ Kd5 54. Rd7+ Kc5 55. Rd6 Rxb3 56. Rxe6 Nc6 57. Ke2 Ra3 58. f5 Kd5 59. Rd6+ Kxe5 1/2-1/2

[Event "US Masters op"]
[Site "Charlotte"]
[Date "2023.11.24"]
[Round "5"]
[White "Matviishen, Viktor"]
[Black "Antipov, Mikhail Al"]
[Result "1/2-1/2"]
[ECO "E40"]
[WhiteElo "2556"]
[BlackElo "2597"]
[PlyCount "7"]
[EventDate "2023.11.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB48_2023"]
[SourceDate "2023.11.29"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 1/2-1/2

[Event "US Masters op"]
[Site "Charlotte"]
[Date "2023.11.24"]
[Round "4"]
[White "Matviishen, Viktor"]
[Black "Mardov, Dimitar"]
[Result "1-0"]
[ECO "D36"]
[WhiteElo "2556"]
[BlackElo "2455"]
[PlyCount "137"]
[EventDate "2023.11.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB48_2023"]
[SourceDate "2023.11.29"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 0-0 7. Bd3 Re8 8. Nge2 c6 9. Qc2 Nbd7 10. 0-0 Nf8 11. f3 h6 12. Bh4 Ne6 13. Bf2 c5 14. dxc5 Nxc5 15. Bb5 Bd7 16. Bxd7 Ncxd7 17. Nf4 Nb6 18. Rad1 Bd6 19. Qb3 Bxf4 20. exf4 Qd7 21. Bxb6 axb6 22. Qxb6 Ra6 23. Qf2 Rc6 24. Rd2 Rc4 25. Ne2 Qc7 26. g3 Rc2 27. Nd4 Rc1 28. Rdd1 Rxd1 29. Rxd1 Qa5 30. a3 Qa4 31. Rc1 Qa6 32. Qd2 h5 33. h4 Nd7 34. Kf2 b6 35. Re1 Rxe1 36. Kxe1 Nc5 37. Kf2 Qc4 38. Qc3 Qa2 39. Nf5 f6 40. Ne3 Qb1 41. Kg2 Nd3 42. Qd4 Ne1+ 43. Kh3 Nd3 44. Qxd5+ Kf8 45. Qd8+ Kf7 46. Qd7+ Kf8 47. Qc8+ Kf7 48. Qc4+ Kf8 49. Qc8+ Kf7 50. Qc4+ Kf8 51. Kh2 Qxb2+ 52. Qc2 Qxc2+ 53. Nxc2 Ke7 54. Kg2 Kd6 55. Kf1 g6 56. Ke2 Nb2 57. Ke3 Kd5 58. f5 g5 59. hxg5 fxg5 60. g4 Nc4+ 61. Kf2 hxg4 62. fxg4 Ke5 63. Ke2 Kf4 64. Ne3 Nxa3 65. f6 Nb5 66. Nf5 Nc3+ 67. Ke1 Kxg4 68. Nh6+ Kh5 69. f7 1-0

[Event "US Masters op"]
[Site "Charlotte"]
[Date "2023.11.23"]
[Round "2"]
[White "Matviishen, Viktor"]
[Black "Lin, Andy"]
[Result "1-0"]
[ECO "D31"]
[WhiteElo "2556"]
[BlackElo "2314"]
[PlyCount "39"]
[EventDate "2023.11.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB48_2023"]
[SourceDate "2023.11.29"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.29"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Bd2 Qxd4 7. Bxb4 Qxe4+ 8. Be2 Na6 9. Ba5 b6 10. Qd6 Bd7 11. Bc3 Nf6 12. Nf3 0-0-0 13. Ne5 Be8 14. Qa3 Nb8 15. Qxa7 Nfd7 16. Rd1 c5 17. 0-0 Qxe2 18. Rfe1 Qh5 19. Rd6 Qg5 20. Nc6 1-0

[Event "US Masters op"]
[Site "Charlotte"]
[Date "2023.11.23"]
[Round "3"]
[White "Siddharth, Jagadeesh"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "B53"]
[WhiteElo "2438"]
[BlackElo "2556"]
[PlyCount "54"]
[EventDate "2023.11.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB48_2023"]
[SourceDate "2023.11.29"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.29"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 e6 9. 0-0-0 Be7 10. Rhe1 0-0 11. e5 dxe5 12. Nxe5 Qxd4 13. Rxd4 Rfc8 14. Nxc6 Rxc6 15. Ne4 e5 16. Rdd1 Nxe4 17. Bxe7 Nxf2 18. Rd2 Re6 19. Bd6 e4 20. Rxf2 Rxd6 21. Rxe4 Rad8 22. c4 f6 23. Re7 R6d7 24. Rxd7 Rxd7 25. Kc2 Kf7 26. b4 g6 27. Kc3 f5 1/2-1/2

[Event "US Masters op"]
[Site "Charlotte"]
[Date "2023.11.22"]
[Round "1"]
[White "Rutten, Alexander"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "2188"]
[BlackElo "2556"]
[PlyCount "84"]
[EventDate "2023.11.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CB48_2023"]
[SourceDate "2023.11.29"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.29"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. f3 e6 4. Nc3 Bb4 5. Bf4 Ne7 6. a3 Bxc3+ 7. bxc3 c5 8. Qd2 Nbc6 9. Bb5 0-0 10. Ne2 dxe4 11. fxe4 e5 12. Be3 cxd4 13. cxd4 exd4 14. Nxd4 Nxd4 15. Bxd4 a6 16. Be2 Nc6 17. Bf2 Qxd2+ 18. Kxd2 Rd8+ 19. Bd3 Be6 20. a4 Rd7 21. Rhb1 Ne5 22. Ke2 Rc8 23. Ra3 f6 24. h3 Bc4 25. Rd1 Kf8 26. Rd2 Be6 27. Ra1 Rc3 28. Bg3 Nc6 29. Bf2 Bc4 30. Rb1 Rxc2 31. Rxc2 Bxd3+ 32. Kd2 Bxe4+ 33. Kc1 Bxc2 34. Kxc2 Ke7 35. Kc3 Ne5 36. Rb6 Kd8 37. Re6 Rd3+ 38. Kc2 Ra3 39. Bc5 Rxa4 40. Kb3 Re4 41. Bf8 Re3+ 42. Ka4 b5+ 0-1

[Event "Texas Collegiate Finals"]
[Site "Brownsville"]
[Date "2023.09.17"]
[Round "3.7"]
[White "Brodsky, David"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "2493"]
[BlackElo "2539"]
[PlyCount "80"]
[EventDate "2023.09.16"]
[EventType "team-tourn"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Texas Dallas Univ"]
[BlackTeam "Texas Tech Univ"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "USA"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bd3 e5 7. Nde2 Be7 8. 0-0 Be6 9. f4 exf4 10. Nxf4 Nc6 11. b3 0-0 12. Bb2 Ne5 13. Kh1 Rc8 14. Qe1 Nfd7 15. Be2 Rc6 16. Rd1 Bh4 17. Qd2 Bg5 18. Ncd5 Bxd5 19. exd5 Rc7 20. Ba3 Nf6 21. c4 Re8 22. Bd3 Neg4 23. Rde1 Rce7 24. Rxe7 Qxe7 25. h3 Ne5 26. Qd1 g6 27. Bc2 Bxf4 28. Rxf4 Nh5 29. Rf2 f5 30. Kg1 f4 31. c5 dxc5 32. d6 Qg5 33. d7 Rd8 34. Qd5+ Nf7 35. Qxb7 Qe5 36. Qxa6 Ng3 37. Kh2 Qe1 38. Rxf4 Ne2 39. Bxc5 Qg3+ 40. Kh1 Nxf4 0-1

[Event "Texas Collegiate Finals"]
[Site "Brownsville"]
[Date "2023.09.17"]
[Round "4.11"]
[White "Druska, Juraj"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "B92"]
[WhiteElo "2471"]
[BlackElo "2539"]
[PlyCount "96"]
[EventDate "2023.09.16"]
[EventType "team-tourn"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Texas Rio Grande Valley Univ"]
[BlackTeam "Texas Tech Univ"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "USA"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nf3 Be7 8. Bg5 Be6 9. Bxf6 Bxf6 10. 0-0 0-0 11. Qd2 Be7 12. Nd5 Nd7 13. Rfd1 Bxd5 14. Qxd5 Qc7 15. Qc4 Rfc8 16. Qxc7 Rxc7 17. c3 Nc5 18. Bd3 b5 19. Bc2 a5 20. Nd2 Ra6 21. Bb3 Bg5 22. Bd5 Bxd2 23. Rxd2 b4 24. cxb4 axb4 25. Rc1 Kf8 26. Rdc2 Rb6 27. g3 Ke7 28. f4 exf4 29. gxf4 Rd7 30. Kg2 b3 31. axb3 Nxb3 32. Rd1 Rb4 33. Rd3 Nc5 34. Re3 Rd4 35. Kf3 Ra7 36. Rc4 Rd2 37. Re2 Rd1 38. b4 Nd7 39. b5 Rf1+ 40. Rf2 Rb1 41. Bc6 Ra3+ 42. Kg2 Nc5 43. e5 Nd3 44. exd6+ Kxd6 45. Re2 Ne1+ 46. Kf2 Nd3+ 47. Kg2 Ne1+ 48. Kf2 Nd3+ 1/2-1/2

[Event "Texas Collegiate Finals"]
[Site "Brownsville"]
[Date "2023.09.16"]
[Round "2.7"]
[White "Matviishen, Viktor"]
[Black "Macovei, Andrei"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "2539"]
[BlackElo "2438"]
[PlyCount "141"]
[EventDate "2023.09.16"]
[EventType "team-tourn"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Texas Tech Univ"]
[BlackTeam "Texas Dallas Univ II"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "USA"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 0-0 7. 0-0 Nbd7 8. Qc2 c6 9. Rd1 b6 10. b3 a5 11. Bc3 Ne4 12. Bb2 Ba6 13. Nc3 f5 14. e3 b5 15. c5 b4 16. Ne2 g5 17. Ne1 a4 18. Nd3 Qa5 19. f3 Nef6 20. Rab1 a3 21. Bc1 Qb5 22. Bf1 Rfe8 23. Nf2 Qb7 24. Bd2 Nf8 25. Nc1 Bxf1 26. Rxf1 Ng6 27. Ncd3 h5 28. Nxb4 g4 29. e4 dxe4 30. fxe4 Qd7 31. Rbe1 Bf8 32. Bc3 Nh7 33. d5 cxd5 34. c6 Qf7 35. exf5 exf5 36. Qd2 d4 37. Rxe8 Rxe8 38. Qxd4 Ng5 39. Qd7 Nf3+ 40. Kg2 Bxb4 41. Bxb4 Nge5 42. Qxf7+ Kxf7 43. Rc1 Ke6 44. Bxa3 Rc8 45. c7 Kd7 46. Bb2 Nc6 47. Rc5 Kxc7 48. Rxf5 Rd8 49. Bc3 Ra8 50. a4 Re8 51. Rxh5 Re3 52. Rc5 Re2 53. h3 Kd6 54. b4 Nd2 55. Bxd2 Rxd2 56. hxg4 Nxb4 57. Rc4 Nd5 58. Kf3 Ra2 59. Nd3 Nb6 60. Rd4+ Ke7 61. Nc5 Rc2 62. Rb4 Nd5 63. Rb7+ Kd6 64. Ne4+ Ke5 65. Rb5 Rc4 66. Nc5 Kd6 67. Nb7+ Ke6 68. g5 Rc3+ 69. Kg4 Ne3+ 70. Kh5 Nf5 71. Nd8+ 1-0

[Event "Texas Collegiate Finals"]
[Site "Brownsville"]
[Date "2023.09.16"]
[Round "1.11"]
[White "Matviishen, Viktor"]
[Black "Wang, Tianqi"]
[Result "1/2-1/2"]
[ECO "D36"]
[WhiteElo "2539"]
[BlackElo "2339"]
[PlyCount "73"]
[EventDate "2023.09.16"]
[EventType "team-tourn"]
[EventRounds "4"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Texas Tech Univ"]
[BlackTeam "Texas Rio Grande Valley Univ II"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "USA"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. cxd5 exd5 6. Bg5 h6 7. Bh4 c6 8. Qc2 g6 9. e3 Bf5 10. Bd3 Bxd3 11. Qxd3 Nbd7 12. 0-0 Nh5 13. Bxe7 Qxe7 14. b4 a6 15. e4 dxe4 16. Nxe4 0-0 17. Rfe1 Nhf6 18. Nc5 Nxc5 19. dxc5 Qc7 20. Qd2 Kh7 21. Ne5 a5 22. Nc4 axb4 23. Qxb4 Nd5 24. Qb3 Rfe8 25. g3 Re7 26. Rab1 Rae8 27. Rxe7 Rxe7 28. a4 Re4 29. Qd3 Qe7 30. Nd6 Re1+ 31. Rxe1 Qxe1+ 32. Kg2 Kg8 33. Qf3 Qe7 34. a5 h5 35. Qb3 Qe6 36. Qxb7 Nf4+ 37. gxf4 1/2-1/2

[Event "Sunnyvale Silicon Valley Fall op"]
[Site "Sunnyvale"]
[Date "2023.09.04"]
[Round "8"]
[White "Liang, Jason"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "2450"]
[BlackElo "2539"]
[PlyCount "118"]
[EventDate "2023.08.31"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e5 7. Nf3 Be7 8. g4 h6 9. Rg1 Be6 10. g5 hxg5 11. Nxg5 Nc6 12. Nxe6 fxe6 13. Rxg7 Qd7 14. Be3 0-0-0 15. Qf3 Nd4 16. Bxd4 exd4 17. Na4 Qxa4 18. Rxe7 Qb4+ 19. Ke2 Nd7 20. Qb3 Qc5 21. Ke1 Kb8 22. Rd1 Rhf8 23. Rd2 Qg5 24. Rh7 Nc5 25. Qb6 Rxf2 26. Rxf2 Qc1+ 27. Ke2 Qxc2+ 28. Ke1 Qc1+ 29. Ke2 Qe3+ 30. Kd1 Qxf2 31. Qxd8+ Ka7 32. Be2 Qg1+ 33. Kc2 Qe3 34. Kd1 Qg1+ 35. Kc2 Qe3 36. Kd1 d3 37. Bg4 Qg1+ 38. Kd2 Qf2+ 39. Kc3 Qe1+ 40. Kd4 Qxe4+ 41. Kc3 Qxh7 42. b4 Qg7+ 43. Kd2 Qb2+ 44. Ke3 Qe5+ 45. Kd2 Qf4+ 46. Kc3 Ne4+ 47. Kxd3 d5 48. Kd4 Nf2+ 49. Kc3 Qc4+ 50. Kd2 Nxg4 51. hxg4 Qxb4+ 52. Kc2 Qxg4 53. Qd6 Qc4+ 54. Kb2 d4 55. a4 a5 56. Qd7 e5 57. Qe8 Qc3+ 58. Kb1 d3 59. Qd7 Qd4 0-1

[Event "Sunnyvale Silicon Valley Fall op"]
[Site "Sunnyvale"]
[Date "2023.09.04"]
[Round "9"]
[White "Matviishen, Viktor"]
[Black "Raja, Harshit"]
[Result "1-0"]
[ECO "E49"]
[WhiteElo "2539"]
[BlackElo "2509"]
[PlyCount "47"]
[EventDate "2023.08.31"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 dxc4 8. Bxc4 c5 9. Ne2 Qc7 10. Bd3 Nc6 11. f4 b6 12. 0-0 Bb7 13. Ng3 Ne7 14. e4 cxd4 15. cxd4 Qc3 16. Ra2 Qxd4+ 17. Kh1 Rad8 18. Rd2 Qc5 19. Bb2 Ng6 20. h3 e5 21. fxe5 Nd7 22. Bb1 Qc7 23. e6 Qxg3 24. Rxf7 1-0

[Event "Sunnyvale Silicon Valley Fall op"]
[Site "Sunnyvale"]
[Date "2023.09.03"]
[Round "6"]
[White "Fernandez, Daniel Howard"]
[Black "Matviishen, Viktor"]
[Result "1-0"]
[ECO "B50"]
[WhiteElo "2524"]
[BlackElo "2539"]
[PlyCount "95"]
[EventDate "2023.08.31"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nf6 4. e5 dxe5 5. Nxe5 a6 6. g3 Qd6 7. Nf3 Bg4 8. Bg2 Nc6 9. h3 Bh5 10. g4 Bg6 11. Nh4 e6 12. d3 Be7 13. 0-0 Nd7 14. Nxg6 hxg6 15. Qf3 Nde5 16. Qg3 Bh4 17. Bxc6+ bxc6 18. Qg2 Nd7 19. Ne4 Qc7 20. g5 0-0-0 21. f4 Nb6 22. Nxc5 Nd5 23. d4 Ne7 24. Qe2 Rd5 25. Rf3 Qa7 26. Ra3 Nf5 27. Qxa6+ Qxa6 28. Rxa6 Kb8 29. c3 Bg3 30. a4 Rxc5 31. dxc5 Rd8 32. Ra3 Rd1+ 33. Kg2 Rxc1 34. Rb3+ Kc7 35. Ra7+ Kc8 36. Ra8+ Kc7 37. Rab8 Rc2+ 38. Kf3 Rf2+ 39. Ke4 Rxf4+ 40. Kd3 Rf3+ 41. Kc2 Ne3+ 42. Kb1 Kd7 43. R3b7+ Bc7 44. a5 Rf1+ 45. Ka2 Rf4 46. Rf8 Nd5 47. Kb3 Rf1 48. a6 1-0

[Event "Sunnyvale Silicon Valley Fall op"]
[Site "Sunnyvale"]
[Date "2023.09.03"]
[Round "7"]
[White "Matviishen, Viktor"]
[Black "Kevlishvili, Robby"]
[Result "1/2-1/2"]
[ECO "D23"]
[WhiteElo "2539"]
[BlackElo "2517"]
[PlyCount "54"]
[EventDate "2023.08.31"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qb3 dxc4 5. Qxc4 Bg4 6. Nbd2 Nbd7 7. g3 e6 8. Bg2 Be7 9. 0-0 0-0 10. Qb3 Qb6 11. Nc4 Qa6 12. Bd2 Rfd8 13. e3 Bf5 14. Rfc1 Be4 15. a4 Bd5 16. Qc2 c5 17. dxc5 Nxc5 18. Nd4 Nce4 19. Be1 Rac8 20. b3 Nd6 21. Bf1 Nxc4 22. bxc4 Be4 23. Qb2 e5 24. c5 Bd3 25. Nf5 Bxc5 26. Bxd3 Qxd3 27. Qxe5 Re8 1/2-1/2

[Event "Sunnyvale Silicon Valley Fall op"]
[Site "Sunnyvale"]
[Date "2023.09.02"]
[Round "4"]
[White "Escalante Ramirez, Brian Sebastian"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "2494"]
[BlackElo "2539"]
[PlyCount "36"]
[EventDate "2023.08.31"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 Bf5 6. Be3 cxd4 7. Nxd4 Nf6 8. Nxf5 Qxf5 9. Qa4 a6 10. Na3 Rc8 11. Rd1 Nd5 12. Bd3 Qe5 13. Bxa6 Nxe3 14. Bxb7 Nxd1+ 15. Kxd1 Qc7 16. Bxc8 Qxc8 17. Nc4 f6 18. b4 Qg4+ 0-1

[Event "Sunnyvale Silicon Valley Fall op"]
[Site "Sunnyvale"]
[Date "2023.09.02"]
[Round "5"]
[White "Matviishen, Viktor"]
[Black "Theodorou, Nikolas"]
[Result "1/2-1/2"]
[ECO "E70"]
[WhiteElo "2539"]
[BlackElo "2604"]
[PlyCount "7"]
[EventDate "2023.08.31"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 1/2-1/2

[Event "Sunnyvale Silicon Valley Fall op"]
[Site "Sunnyvale"]
[Date "2023.09.01"]
[Round "2"]
[White "Heimann, Mark A"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "A34"]
[WhiteElo "2435"]
[BlackElo "2539"]
[PlyCount "41"]
[EventDate "2023.08.31"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Ne6 9. Ne5 g6 10. Qa4+ Bd7 11. Bxe6 fxe6 12. Qc4 Bg7 13. Nxd7 Qxd7 14. Qxc5 0-0 15. f3 Nc6 16. Qe3 Nb4 17. Rb1 Nd3 18. b3 b5 19. a3 a5 20. b4 axb4 21. axb4 0-1

[Event "Sunnyvale Silicon Valley Fall op"]
[Site "Sunnyvale"]
[Date "2023.09.01"]
[Round "3"]
[White "Matviishen, Viktor"]
[Black "Kantor, Gergely"]
[Result "1/2-1/2"]
[ECO "E20"]
[WhiteElo "2539"]
[BlackElo "2529"]
[PlyCount "5"]
[EventDate "2023.08.31"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 1/2-1/2

[Event "Sunnyvale Silicon Valley Fall op"]
[Site "Sunnyvale"]
[Date "2023.08.31"]
[Round "1"]
[White "Matviishen, Viktor"]
[Black "Penagalapati, Abhinav"]
[Result "1-0"]
[ECO "A94"]
[WhiteElo "2539"]
[BlackElo "2133"]
[PlyCount "75"]
[EventDate "2023.08.31"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 f5 2. g3 Nf6 3. Bg2 e6 4. c4 d5 5. Nf3 Bd6 6. 0-0 0-0 7. Qc2 c6 8. b3 Nbd7 9. Ba3 Bxa3 10. Nxa3 Qe7 11. Qb2 a5 12. Rfc1 Ne4 13. Nc2 f4 14. Nce1 fxg3 15. hxg3 Qf7 16. Nd3 Qf5 17. Rf1 a4 18. Qc1 g5 19. b4 Ndf6 20. Nfe5 h5 21. Nc5 Nd6 22. f3 b6 23. Nxc6 Kh8 24. e4 Qg6 25. e5 Nxc4 26. exf6 bxc5 27. bxc5 Qxf6 28. f4 g4 29. Qe1 Ba6 30. Rb1 Na3 31. Rb2 Bxf1 32. Bxf1 Rfc8 33. Ne5 Rcb8 34. Rh2 Rb1 35. Rxh5+ Kg8 36. Qe2 Ra7 37. Qd3 Rab7 38. c6 1-0

[Event "Casablanca Mohammed op 4th"]
[Site "Casablanca"]
[Date "2023.08.19"]
[Round "9"]
[White "Matviishen, Viktor"]
[Black "Sambuev, Bator"]
[Result "1-0"]
[ECO "E41"]
[WhiteElo "2550"]
[BlackElo "2462"]
[PlyCount "71"]
[EventDate "2023.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "MAR"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nge2 cxd4 7. exd4 d5 8. cxd5 Nxd5 9. 0-0 Nxc3 10. bxc3 Bd6 11. Ng3 Qh4 12. Re1 0-0 13. Re4 Qd8 14. Qh5 g6 15. Qf3 f5 16. Re1 Bd7 17. Rb1 Rc8 18. Rxb7 Rf7 19. Bc4 Kg7 20. Rb1 Qf6 21. Ba6 Rc7 22. Bf4 e5 23. dxe5 Bxe5 24. Nh5+ gxh5 25. Qg3+ Kf8 26. Rxe5 Nxe5 27. Bxe5 f4 28. Rb8+ Bc8 29. Bxf6 fxg3 30. Be5 Rc5 31. Bd4 gxf2+ 32. Kf1 Rc6 33. Bxc8 Ke7 34. Rb7+ Ke8 35. Rxf7 Kxf7 36. Bb7 1-0

[Event "Casablanca Mohammed op 4th"]
[Site "Casablanca"]
[Date "2023.08.18"]
[Round "8"]
[White "Matviishen, Viktor"]
[Black "Quintiliano Pinto, Renato Rodrigues"]
[Result "1/2-1/2"]
[ECO "D32"]
[WhiteElo "2550"]
[BlackElo "2515"]
[PlyCount "176"]
[EventDate "2023.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "MAR"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. dxc5 d4 7. Na4 Bxc5 8. Nxc5 Qa5+ 9. Bd2 Qxc5 10. e3 dxe3 11. Bxe3 Qb4+ 12. Qd2 Qxd2+ 13. Nxd2 Nge7 14. Bc4 0-0 15. 0-0 Be6 16. Bxe6 fxe6 17. Rfe1 Nf5 18. Bc5 Rfe8 19. f3 b6 20. Bf2 Rad8 21. Ne4 Nb4 22. Rec1 Nd3 23. Rc2 h6 24. a4 e5 25. a5 Nxf2 26. Kxf2 bxa5 27. Rxa5 Re7 28. Rcc5 Rb8 29. Rab5 Reb7 30. Nc3 Nd6 31. Rxb7 Rxb7 32. Nd1 Nf7 33. Ke3 Kf8 34. Kd3 Ke7 35. Kc2 Ke6 36. Nf2 Nd6 37. Nd3 Nf7 38. Kc3 Kd6 39. Kc4 Ke6 40. b4 Nd6+ 41. Kb3 Rb5 42. Rc7 a5 43. Rxg7 Nf5 44. Rg6+ Kf7 45. Ra6 Rd5 46. Nc5 axb4 47. Ne4 Kg7 48. Kxb4 Nh4 49. Ra2 Rd1 50. Rf2 Nf5 51. Kc5 Kg6 52. Nd2 Nd4 53. Kc4 Kf5 54. Nf1 Rc1+ 55. Kd5 Rc8 56. Ra2 Rd8+ 57. Kc4 Kf4 58. Ra6 Nf5 59. Rg6 h5 60. Kc3 e4 61. fxe4 Kxe4 62. Rg5 Rd3+ 63. Kc2 Rd5 64. Kc1 h4 65. Rg4+ Ke5 66. h3 Rd4 67. Rg8 Rd7 68. Nh2 Rg7 69. Ng4+ Ke4 70. Rf8 Nd4 71. Kd2 Ra7 72. Nf2+ Kd5 73. Nd1 Ke5 74. Re8+ Kf4 75. Ne3 Ra2+ 76. Kd3 Nc6 77. Re4+ Kg3 78. Rg4+ Kf2 79. Rf4+ Kg3 80. Rf3+ Kh2 81. Ke4 Ra4+ 82. Kd5 Ne7+ 83. Ke6 Re4+ 84. Kf6 Rxe3 85. Rxe3 Nd5+ 86. Kg5 Nxe3 87. Kxh4 Nxg2+ 88. Kg5 Kxh3 1/2-1/2

[Event "Casablanca Mohammed op 4th"]
[Site "Casablanca"]
[Date "2023.08.18"]
[Round "7"]
[White "Vidyarthi, Vyom"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "E35"]
[WhiteElo "2429"]
[BlackElo "2550"]
[PlyCount "100"]
[EventDate "2023.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "MAR"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5 6. Bg5 h6 7. Bh4 Nc6 8. e3 g5 9. Bg3 h5 10. Bd3 Qe7 11. Nge2 h4 12. Be5 Nxe5 13. dxe5 Ng4 14. Bf5 0-0 15. 0-0-0 c6 16. Bxg4 Bxg4 17. f3 Bh5 18. f4 Bxc3 19. bxc3 Bg6 20. f5 Bh7 21. g4 Qxe5 22. Nd4 Rfe8 23. Rhe1 Qe4 24. Qf2 f6 25. h3 c5 26. Nb3 b6 27. Qc2 Qe5 28. e4 dxe4 29. Re3 Qf4 30. Rde1 Re7 31. Nd2 Rae8 32. Kb2 Kg7 33. Nxe4 Bg8 34. Qd3 Bf7 35. R3e2 b5 36. Nxc5 Rxe2+ 37. Rxe2 Rxe2+ 38. Qxe2 Qd6 39. Ne6+ Bxe6 40. fxe6 Kf8 41. Qf2 Qxe6 42. Qxa7 Qe2+ 43. Kb3 Qc4+ 44. Kb2 Qd3 45. Qc7 Qe2+ 46. Kb1 Qe7 47. Qb8+ Qe8 48. Qd6+ Kg7 49. Qd3 Qe5 50. Kc2 Qg3 1/2-1/2

[Event "Casablanca Mohammed op 4th"]
[Site "Casablanca"]
[Date "2023.08.16"]
[Round "5"]
[White "Chasin, Nico Werner"]
[Black "Matviishen, Viktor"]
[Result "1-0"]
[ECO "A50"]
[WhiteElo "2450"]
[BlackElo "2550"]
[PlyCount "109"]
[EventDate "2023.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "MAR"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. 0-0 g6 5. c4 Bg7 6. Nc3 0-0 7. d4 Ne4 8. Bd2 Nxd2 9. Qxd2 c5 10. d5 d6 11. e4 Nd7 12. Rfe1 a6 13. a4 Bc8 14. b3 Rb8 15. Rad1 b5 16. axb5 Qa5 17. Rc1 axb5 18. Nxb5 Qxd2 19. Nxd2 Ne5 20. Bf1 g5 21. Ra1 g4 22. Kg2 f5 23. Ra7 Rf7 24. Be2 fxe4 25. Nxe4 Bh6 26. Bd1 Bf5 27. Nxc5 Nf3 28. Re6 Bxe6 29. dxe6 Rf5 30. Nd7 Rc8 31. Bxf3 gxf3+ 32. Kh3 Be3 33. Ra2 Rh5+ 34. Kg4 Rxh2 35. Kxf3 Bc5 36. Nc3 Rh1 37. Nd5 Re8 38. b4 Bd4 39. Ke4 Rd1 40. b5 Bc5 41. b6 Rb1 42. Ra7 Kg7 43. Kf5 Kh6 44. g4 Rg8 45. f4 Rf1 46. Nxc5 Rf8+ 47. Ke4 Re1+ 48. Ne3 dxc5 49. Rxe7 Ra8 50. b7 Rb8 51. Rd7 Rb1 52. Nf5+ Kg6 53. Nd6 Kf6 54. f5 Re1+ 55. Kd5 1-0

[Event "Casablanca Mohammed op 4th"]
[Site "Casablanca"]
[Date "2023.08.16"]
[Round "4"]
[White "Matviishen, Viktor"]
[Black "Mohammad, Nubairshah Shaikh"]
[Result "1-0"]
[ECO "D23"]
[WhiteElo "2550"]
[BlackElo "2430"]
[PlyCount "87"]
[EventDate "2023.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "MAR"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qb3 dxc4 5. Qxc4 Bg4 6. Nbd2 Nbd7 7. g3 e6 8. Bg2 Be7 9. 0-0 0-0 10. Qb3 Qb6 11. Nc4 Qa6 12. Bd2 Rac8 13. Rfc1 Bh5 14. e3 c5 15. a4 Ne4 16. Be1 cxd4 17. Nxd4 Nec5 18. Qa3 Bg6 19. Bf1 Rfd8 20. b4 Ne4 21. Qb3 Rxc4 22. Bxc4 Qd6 23. Rd1 Ne5 24. Be2 Qb8 25. f3 Nf6 26. b5 h5 27. Bb4 Bxb4 28. Qxb4 h4 29. g4 Bd3 30. Qe1 g5 31. Qf2 Bxe2 32. Qxe2 Qc7 33. Rac1 Qa5 34. f4 gxf4 35. exf4 Nexg4 36. h3 Nh6 37. Qe5 Nh7 38. Kh1 Qxa4 39. Rg1+ Kf8 40. Nxe6+ fxe6 41. Qh8+ Ke7 42. Rc7+ Rd7 43. Qxh7+ Nf7 44. Rxd7+ 1-0

[Event "Casablanca Mohammed op 4th"]
[Site "Casablanca"]
[Date "2023.08.15"]
[Round "2"]
[White "Matviishen, Viktor"]
[Black "Kurmangaliyeva, Liya"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "2550"]
[BlackElo "2250"]
[PlyCount "77"]
[EventDate "2023.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "MAR"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Bf4 Nc6 5. e3 Nf6 6. Bd3 a6 7. h3 e6 8. Nc3 Bd6 9. Bxd6 Qxd6 10. f4 b5 11. Nf3 Bb7 12. 0-0 0-0 13. Ne5 Na5 14. b3 Rac8 15. Qe1 Qb6 16. f5 Nc6 17. fxe6 fxe6 18. Nxc6 Qxc6 19. Ne2 Qd6 20. Qh4 Rc7 21. Rf3 Rcf7 22. Raf1 Qe7 23. Nf4 e5 24. dxe5 Qxe5 25. Bg6 hxg6 26. Nxg6 Qh5 27. Qxh5 Nxh5 28. Nxf8 Rxf3 29. Rxf3 d4 30. e4 Bxe4 31. Rf2 Bb1 32. Ne6 d3 33. Nc5 Ng3 34. Rd2 Ne2+ 35. Kf2 Nc1 36. a3 a5 37. Ke3 Bc2 38. b4 a4 39. Nxd3 1-0

[Event "Casablanca Mohammed op 4th"]
[Site "Casablanca"]
[Date "2023.08.15"]
[Round "3"]
[White "Msellek, Ilyass"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "B51"]
[WhiteElo "2420"]
[BlackElo "2550"]
[PlyCount "53"]
[EventDate "2023.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "MAR"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. 0-0 a6 5. Bd3 Ngf6 6. c3 b5 7. a4 Bb7 8. axb5 axb5 9. Rxa8 Qxa8 10. Bxb5 Bxe4 11. d4 Bxb1 12. dxc5 Be4 13. Re1 e6 14. Rxe4 Qxe4 15. c6 Be7 16. Nd2 Qd5 17. cxd7+ Nxd7 18. Qa4 Qb7 19. Bc6 Qc7 20. Nc4 d5 21. Bf4 Qxf4 22. Bxd7+ Kd8 23. Qa8+ Kxd7 24. Qa4+ Kd8 25. Qa8+ Kd7 26. Qa4+ Kd8 27. Qa8+ 1/2-1/2

[Event "Casablanca Mohammed op 4th"]
[Site "Casablanca"]
[Date "2023.08.14"]
[Round "1"]
[White "Ahmad, Al Khatib"]
[Black "Matviishen, Viktor"]
[Result "1-0"]
[ECO "D45"]
[WhiteElo "2359"]
[BlackElo "2550"]
[PlyCount "91"]
[EventDate "2023.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "MAR"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c6 3. Nc3 d5 4. e3 e6 5. Nf3 a6 6. b3 Bb4 7. Bd2 Nbd7 8. Bd3 0-0 9. 0-0 Bd6 10. e4 dxc4 11. bxc4 e5 12. c5 Bc7 13. Na4 exd4 14. Re1 Ng4 15. h3 Nge5 16. Nxe5 Nxe5 17. Bf1 Ng6 18. g3 f5 19. exf5 Bxf5 20. Qb3+ Kh8 21. Qxb7 Rb8 22. Qxa6 Qd7 23. Nb6 Bxb6 24. cxb6 Bxh3 25. Bb4 Nh4 26. Bxf8 Nf3+ 27. Kh1 Bxf1 28. Bxg7+ Kxg7 29. Qxf1 Qd5 30. Re7+ Kf6 31. Rc7 Rxb6 32. Qh3 h5 33. Qd7 Qxd7 34. Rxd7 c5 35. a4 Ne5 36. Rd5 Nd3 37. a5 Ra6 38. Kg1 h4 39. gxh4 Ke6 40. Rh5 Ra8 41. a6 c4 42. a7 c3 43. Ra6+ Kf7 44. Rh7+ Kg8 45. Rb7 c2 46. Rc6 1-0

[Event "US op 123nd"]
[Site "Grand Rapids"]
[Date "2023.08.06"]
[Round "9"]
[White "Matviishen, Viktor"]
[Black "Rahul, Srivatshav P"]
[Result "1/2-1/2"]
[ECO "A72"]
[WhiteElo "2550"]
[BlackElo "2481"]
[PlyCount "51"]
[EventDate "2023.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. d5 exd5 5. cxd5 d6 6. Nf3 g6 7. e4 Bg7 8. Be2 0-0 9. Be3 Bg4 10. Nd2 Bxe2 11. Qxe2 Na6 12. 0-0 Re8 13. h3 Nc7 14. a4 Na6 15. Bf4 Nb4 16. Nc4 Nbxd5 17. Nxd5 Nxd5 18. Bxd6 Nb6 19. Rad1 Qh4 20. f4 Bd4+ 21. Kh1 Nxc4 22. Qxc4 Rxe4 23. Bxc5 Re3 24. Qxd4 Rxh3+ 25. gxh3 Qxh3+ 26. Kg1 1/2-1/2

[Event "US op 123nd"]
[Site "Grand Rapids"]
[Date "2023.08.05"]
[Round "8"]
[White "Matviishen, Viktor"]
[Black "Li, George"]
[Result "1-0"]
[ECO "E48"]
[WhiteElo "2550"]
[BlackElo "2394"]
[PlyCount "99"]
[EventDate "2023.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 c5 6. Nge2 cxd4 7. exd4 d5 8. cxd5 Nxd5 9. 0-0 Nc6 10. a3 Bd6 11. Re1 Re8 12. Bc2 Bd7 13. Ne4 Be7 14. Qd3 g6 15. b4 Rc8 16. Bb3 a5 17. b5 Na7 18. a4 b6 19. Bh6 Rc7 20. Nf4 Nb4 21. Qe2 Nc8 22. d5 exd5 23. Qb2 f6 24. Nxd5 Nxd5 25. Bxd5+ Kh8 26. Ng5 Rf8 27. Bxf8 Qxf8 28. Ne6 Bxe6 29. Bxe6 Bb4 30. Rec1 Bc5 31. Bxc8 Rxc8 32. Re1 Kg7 33. Rad1 Qf7 34. g3 Rc7 35. Re4 h5 36. Rd3 Rc8 37. Qd2 Rc7 38. Rd8 Qb3 39. Rd7+ Rxd7 40. Qxd7+ Kh6 41. Re8 f5 42. Rh8+ Kg5 43. Kg2 Kf6 44. Rc8 Qa2 45. Rc6+ Ke5 46. Rxc5+ bxc5 47. b6 Qb1 48. b7 Qe4+ 49. f3 Qe2+ 50. Kh3 1-0

[Event "US op 123nd"]
[Site "Grand Rapids"]
[Date "2023.08.04"]
[Round "7"]
[White "Markzon, Gregory"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "B91"]
[WhiteElo "2071"]
[BlackElo "2550"]
[PlyCount "64"]
[EventDate "2023.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 Be7 8. Bg2 0-0 9. 0-0 Nbd7 10. h3 b5 11. a3 h5 12. Nd5 Nxd5 13. exd5 h4 14. f4 Bb7 15. g4 Rc8 16. Kh2 Re8 17. Nc3 exf4 18. Bxf4 Rc4 19. Qf3 Bf6 20. Kh1 Bxc3 21. bxc3 Qf6 22. Bxd6 Qxf3 23. Bxf3 Rxc3 24. Bg2 Nb6 25. Rf2 Bxd5 26. Bxd5 Nxd5 27. Rd1 Rxh3+ 28. Kg2 Rg3+ 29. Kh1 Nc3 30. Rd4 Rge3 31. Bb4 Ne4 32. Rd7 Nxf2+ 0-1

[Event "World op 51st"]
[Site "Philadelphia"]
[Date "2023.07.04"]
[Round "9"]
[White "Adewumi, Tanitoluwa"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "B51"]
[WhiteElo "2283"]
[BlackElo "2538"]
[PlyCount "64"]
[EventDate "2023.06.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. c3 Ngf6 5. Bd3 g6 6. Bc2 b5 7. 0-0 Bb7 8. Re1 Bg7 9. d4 0-0 10. Nbd2 cxd4 11. cxd4 e5 12. a4 b4 13. a5 Rc8 14. a6 Bc6 15. d5 Bb5 16. Nb3 Qc7 17. Bd3 Bxd3 18. Qxd3 Qc2 19. Qxc2 Rxc2 20. h3 Rfc8 21. Ra4 Nc5 22. Nxc5 dxc5 23. Nxe5 Nxd5 24. Nc6 Nb6 25. Ne7+ Kf8 26. Nxc8 Nxa4 27. b3 Nc3 28. Nxa7 Ne2+ 29. Kf1 Nxc1 30. Rd1 Bd4 31. Nc6 Nxb3 32. Na5 c4 0-1

[Event "World op 51st"]
[Site "Philadelphia"]
[Date "2023.07.03"]
[Round "6"]
[White "Matviishen, Viktor"]
[Black "Fedorowicz, John P"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "2538"]
[BlackElo "2388"]
[PlyCount "42"]
[EventDate "2023.06.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Bd2 Bg7 6. e4 Nxc3 7. Bxc3 c5 8. d5 Bxc3+ 9. bxc3 0-0 10. Qd2 e6 11. d6 e5 12. h4 Be6 13. h5 g5 14. Rb1 b6 15. h6 Kh8 16. Ne2 c4 17. Ng3 Qf6 18. Rb4 Rc8 19. Rh5 Na6 20. Rb5 Rg8 21. Nf5 Bxf5 1/2-1/2

[Event "Philadelphia op 16th"]
[Site "Philadelphia"]
[Date "2023.06.28"]
[Round "9"]
[White "Le, Tuan Minh"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "D12"]
[WhiteElo "2549"]
[BlackElo "2538"]
[PlyCount "116"]
[EventDate "2023.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c6 3. Nf3 d5 4. e3 Bf5 5. Nc3 e6 6. Nh4 Be4 7. f3 Bg6 8. Bd2 Be7 9. Nxg6 hxg6 10. Qc2 Nbd7 11. 0-0-0 a6 12. g4 dxc4 13. Bxc4 b5 14. Be2 c5 15. Kb1 cxd4 16. exd4 Rc8 17. Qd3 Nb6 18. f4 Nc4 19. Bc1 Qa5 20. g5 b4 21. Ne4 Nd5 22. Nc5 Ndb6 23. Nxe6 fxe6 24. Qxg6+ Kd8 25. d5 exd5 26. Qe6 Nd6 27. Be3 Re8 28. Bh5 Rf8 29. Rhe1 Rc7 30. Bg4 Qb5 31. Bd4 Qc6 32. Bxg7 Rxf4 33. Be5 Rf2 34. g6 Nbc4 35. Qg8+ Bf8 36. g7 Na3+ 37. Ka1 Nc2+ 38. Kb1 Rxg7 39. Bxg7 Na3+ 40. Ka1 Nc2+ 41. Kb1 Na3+ 42. Ka1 Qc2 43. Bf5 Rxf5 44. bxa3 Rf2 45. Bf6+ Rxf6 46. Qxd5 Rf5 47. Qd4 Qc3+ 48. Kb1 Qxd4 49. Rxd4 bxa3 50. Rd3 Rb5+ 51. Kc1 Bh6+ 52. Kd1 Kd7 53. Rxa3 Rb2 54. Re2 Rb1+ 55. Kc2 Rc1+ 56. Kd3 Rd1+ 57. Kc2 Rc1+ 58. Kd3 Rd1+ 1/2-1/2

[Event "Philadelphia op 16th"]
[Site "Philadelphia"]
[Date "2023.06.27"]
[Round "7"]
[White "Khamrakulov, Djurabek"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2490"]
[BlackElo "2538"]
[PlyCount "61"]
[EventDate "2023.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 e6 6. Na3 a6 7. Nc4 Nbd7 8. Be2 b5 9. Nfd2 Ra7 10. Bf3 Qf5 11. Ne3 Qf4 12. Nb3 Qc7 13. a4 c4 14. Nd2 Bd6 15. b3 cxb3 16. Qxb3 0-0 17. axb5 axb5 18. Rxa7 Qxa7 19. Qxb5 e5 20. 0-0 exd4 21. cxd4 Qxd4 22. Ndc4 Qc5 23. Nxd6 Qxd6 24. Rd1 Qb6 25. Qg5 h6 26. Qg3 Qb8 27. Ba3 Qxg3 28. hxg3 Re8 29. Bc6 Re6 30. Nf5 Ne5 31. Bb5 1/2-1/2

[Event "Philadelphia op 16th"]
[Site "Philadelphia"]
[Date "2023.06.27"]
[Round "8"]
[White "Matviishen, Viktor"]
[Black "Salinas Herrera, Pablo Patricio"]
[Result "1-0"]
[ECO "D31"]
[WhiteElo "2538"]
[BlackElo "2486"]
[PlyCount "133"]
[EventDate "2023.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 h6 4. cxd5 exd5 5. Bf4 Nf6 6. e3 Bd6 7. Bxd6 Qxd6 8. Bd3 0-0 9. Nge2 Nc6 10. Rc1 Ne7 11. Nb5 Qb4+ 12. Qd2 Qxd2+ 13. Kxd2 c6 14. Nd6 Ne8 15. Nxc8 Nxc8 16. f3 Nc7 17. g4 Nd6 18. h4 Rfe8 19. g5 hxg5 20. hxg5 g6 21. Nf4 Kg7 22. Rh6 Rh8 23. Nxg6 Rxh6 24. gxh6+ Kxh6 25. Ne5 Kg7 26. Nd7 Nce8 27. Rg1+ Kh8 28. Rh1+ Kg7 29. Rg1+ Kh8 30. e4 Rd8 31. Ne5 Nc7 32. Ng4 dxe4 33. fxe4 Kg7 34. a4 Rh8 35. e5 Nc8 36. Bc4 Nb6 37. b3 Kf8 38. Nf6 a5 39. Rf1 Rh4 40. Ke3 c5 41. d5 Ne8 42. Ne4 Nc7 43. Nf6 Ne8 44. d6 Nxc4+ 45. bxc4 Nxf6 46. Rxf6 Ke8 47. Rf4 Rh1 48. Ke4 Rd1 49. Kf5 Kd7 50. Kf6 Re1 51. Rf5 Ke8 52. Rf3 Kd7 53. Rb3 Rf1+ 54. Kg7 Kc6 55. Kf8 Re1 56. Rd3 Kd7 57. Rd5 b6 58. Kxf7 Rf1+ 59. Kg6 Re1 60. Kf5 Rf1+ 61. Ke4 Re1+ 62. Kf3 Rf1+ 63. Ke2 Rf8 64. Ke3 Rh8 65. Rd1 Rh7 66. Ke4 Ke6 67. d7 1-0

[Event "Philadelphia op 16th"]
[Site "Philadelphia"]
[Date "2023.06.26"]
[Round "6"]
[White "Matviishen, Viktor"]
[Black "Khanin, Semen"]
[Result "1/2-1/2"]
[ECO "B13"]
[WhiteElo "2538"]
[BlackElo "2566"]
[PlyCount "10"]
[EventDate "2023.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 1/2-1/2

[Event "Philadelphia op 16th"]
[Site "Philadelphia"]
[Date "2023.06.26"]
[Round "5"]
[White "Perrine, Dalton"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "2228"]
[BlackElo "2538"]
[PlyCount "52"]
[EventDate "2023.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. 0-0 g6 5. d3 d5 6. Nbd2 Bg7 7. e4 dxe4 8. dxe4 Nfd7 9. Re1 e5 10. Nc4 0-0 11. Bg5 f6 12. Be3 Qe7 13. c3 a5 14. b4 Kh8 15. bxa5 b5 16. Qb3 Bc6 17. Nb2 Na6 18. Nd2 Rfd8 19. Nd3 Ndc5 20. Nxc5 Nxc5 21. Qc2 Nb7 22. Bf1 Rxa5 23. c4 b4 24. Nb3 Ra4 25. c5 Rda8 26. Bc4 Bd7 0-1

[Event "Philadelphia op 16th"]
[Site "Philadelphia"]
[Date "2023.06.25"]
[Round "4"]
[White "Matviishen, Viktor"]
[Black "Bellahcene, Bilel"]
[Result "1/2-1/2"]
[ECO "E49"]
[WhiteElo "2538"]
[BlackElo "2497"]
[PlyCount "78"]
[EventDate "2023.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 dxc4 8. Bxc4 c5 9. Bd3 Nc6 10. Nf3 Qc7 11. Bb2 e5 12. dxe5 Nxe5 13. Nxe5 Qxe5 14. Qe2 Qg5 15. 0-0 Re8 16. e4 c4 17. Bc2 Qc5 18. Kh1 Ng4 19. Rad1 Ne5 20. Rd5 Qc7 21. f4 Nd3 22. Bxd3 cxd3 23. Qxd3 Be6 24. Rd4 Rac8 25. Qf3 f6 26. Rfd1 Bb3 27. R1d2 Qc6 28. h3 Bc4 29. Kh2 Rc7 30. Rd8 Rce7 31. R2d4 Rxd8 32. Rxd8+ Re8 33. Rd4 b5 34. Bc1 Bb3 35. Qd3 Bc4 36. Qc2 a5 37. a4 bxa4 38. Ba3 h6 39. Bd6 Bb3 1/2-1/2

[Event "Philadelphia op 16th"]
[Site "Philadelphia"]
[Date "2023.06.25"]
[Round "3"]
[White "Schmakel, Sam A"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "B10"]
[WhiteElo "2416"]
[BlackElo "2538"]
[PlyCount "72"]
[EventDate "2023.06.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c6 2. Nf3 d5 3. d3 Qc7 4. exd5 cxd5 5. c4 Nf6 6. Nc3 e6 7. g3 Bb4 8. Bd2 dxc4 9. dxc4 a6 10. a3 Bd6 11. Bg5 Nbd7 12. Bg2 h6 13. Be3 b6 14. 0-0 Bb7 15. Rc1 0-0 16. b4 Rac8 17. Na4 Qb8 18. Qe2 Bc6 19. Nc3 a5 20. bxa5 bxa5 21. Nb5 Bc5 22. Bf4 Qa8 23. Rb1 e5 24. Be3 Bxf3 25. Bxf3 e4 26. Bg2 Ne5 27. Bxc5 Rxc5 28. Nd6 Nf3+ 29. Kh1 Rd8 30. Nxe4 Qxe4 31. Bxf3 Qxe2 32. Bxe2 Rd2 33. Rb8+ Kh7 34. Re1 Re5 35. Bd3+ Rxd3 36. Rxe5 Nd7 1/2-1/2

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2023.06.18"]
[Round "9"]
[White "Khanin, Semen"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "D12"]
[WhiteElo "2566"]
[BlackElo "2538"]
[PlyCount "86"]
[EventDate "2023.06.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c6 3. Nf3 d5 4. e3 Bf5 5. Nc3 e6 6. Nh4 Be4 7. f3 Bg6 8. Bd2 Be7 9. Nxg6 hxg6 10. Qc2 Nbd7 11. Bd3 a6 12. c5 e5 13. Na4 Qc7 14. g3 a5 15. 0-0-0 0-0 16. g4 b6 17. Nxb6 Nxb6 18. cxb6 Qxb6 19. dxe5 Nd7 20. f4 a4 21. e6 fxe6 22. Bxg6 Rfb8 23. g5 Bb4 24. Bxb4 Qxb4 25. Rd4 Qb6 26. Bh7+ Kf8 27. a3 c5 28. Rd2 c4 29. Qc3 Qc6 30. Qd4 Nc5 31. Bc2 Rb3 32. f5 Rd3 33. Qh4 d4 34. Qh8+ Ke7 35. Qxg7+ Kd6 36. Rdd1 Rxd1+ 37. Rxd1 d3 38. fxe6 Qe4 39. Qd4+ Qxd4 40. exd4 Nxe6 41. Bxd3 cxd3 42. Rxd3 Nxg5 43. b3 axb3 1/2-1/2

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2023.06.18"]
[Round "8"]
[White "Quesada Perez, Yasser"]
[Black "Matviishen, Viktor"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "2609"]
[BlackElo "2538"]
[PlyCount "117"]
[EventDate "2023.06.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Bf4 Bg4 7. Qb3 Qd7 8. Nd2 e6 9. Ngf3 Bxf3 10. Nxf3 Bd6 11. Bxd6 Qxd6 12. 0-0 0-0 13. Rae1 Qc7 14. Qc2 g6 15. Qd2 Kg7 16. Re3 Qf4 17. h3 Ng8 18. g3 Qc7 19. h4 Nce7 20. Re2 Nf6 21. Ne5 Rae8 22. Kg2 Nd7 23. Ng4 f5 24. Qh6+ Kh8 25. Ne5 Nxe5 26. Rxe5 Ng8 27. Qf4 Nf6 28. Rfe1 Qd7 29. f3 Kg7 30. Qe3 Kf7 31. Qh6 Qc6 32. g4 Kg8 33. Qg5 Kh8 34. gxf5 gxf5 35. Kh3 Rf7 36. h5 Qd7 37. Qh4 Rff8 38. Bxf5 exf5 39. Qxf6+ Rxf6 40. Rxe8+ Rf8 41. Rxf8+ Kg7 42. Rfe8 Qb5 43. R8e7+ Kf8 44. R1e2 Qd3 45. Kg3 b5 46. Kf4 h6 47. Re8+ Kf7 48. R2e7+ Kf6 49. Re6+ Kf7 50. R8e7+ Kf8 51. Ke5 Qe3+ 52. Kd6 Qxf3 53. Kd7 f4 54. Rxh6 Qh3+ 55. Kd8 Kg8 56. Rg6+ Kh8 57. Rf6 Kg8 58. h6 Qh4 59. h7+ 1-0

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2023.06.17"]
[Round "7"]
[White "Matviishen, Viktor"]
[Black "Andriasian, Zaven"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "2538"]
[BlackElo "2579"]
[PlyCount "79"]
[EventDate "2023.06.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bg4 5. h3 Bxf3 6. Qxf3 e6 7. Nc3 Nbd7 8. Bd3 Bb4 9. 0-0 0-0 10. Rd1 Re8 11. Qe2 Qe7 12. Bd2 Rad8 13. a3 Bd6 14. c5 Bc7 15. f4 b6 16. b4 bxc5 17. bxc5 h6 18. Rab1 Rb8 19. Bc2 Ba5 20. Qa6 Bxc3 21. Bxc3 Ne4 22. Be1 Ndf6 23. Qxc6 Rbc8 24. Qa6 g5 25. Rb7 Rc7 26. Rdb1 gxf4 27. Qxa7 Rxb7 28. Rxb7 Qf8 29. exf4 Nh5 30. Kh2 Nxf4 31. Bxe4 dxe4 32. Bg3 Ra8 33. Qb6 Nd5 34. Qb1 Qc8 35. Be5 e3 36. c6 Qe8 37. Qe4 Ne7 38. Qxe3 Ng6 39. Qxh6 Nxe5 40. dxe5 1-0

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2023.06.17"]
[Round "6"]
[White "Melillo, Lucius"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "E15"]
[WhiteElo "1870"]
[BlackElo "2538"]
[PlyCount "94"]
[EventDate "2023.06.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Be7 7. Bc3 d5 8. Bg2 0-0 9. 0-0 c5 10. Ne5 Qc7 11. Nd2 Rd8 12. Qc2 Nbd7 13. Nxd7 Rxd7 14. Rac1 Rad8 15. e3 cxd4 16. Bxd4 e5 17. Bb2 d4 18. exd4 exd4 19. Qd3 Bb4 20. Ne4 Ng4 21. Ng5 g6 22. Nf3 Bb7 23. Rcd1 Bc3 24. Bxc3 dxc3 25. Qc2 Rxd1 26. Rxd1 Rxd1+ 27. Qxd1 Qe7 28. h3 Bxf3 29. Bxf3 Ne5 30. Bd5 b5 31. Qc2 b4 32. Qe4 Qf6 33. Kf1 Nf3 34. Qe3 Nd4 35. Be4 c2 36. Kg2 Qe5 37. Bxc2 Qxe3 38. fxe3 Nxc2 39. Kf3 Kf8 40. Ke4 Ke7 41. Kd3 Na3 42. Kd4 Kd6 43. e4 f6 44. h4 a5 45. c5+ Kc6 46. e5 Nb5+ 47. Ke4 Nc3+ 0-1

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2023.06.16"]
[Round "5"]
[White "Matviishen, Viktor"]
[Black "Durarbayli, Vasif"]
[Result "1/2-1/2"]
[ECO "D45"]
[WhiteElo "2538"]
[BlackElo "2627"]
[PlyCount "120"]
[EventDate "2023.06.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Qc2 Bd6 7. b3 0-0 8. Be2 e5 9. cxd5 e4 10. Nxe4 Nxe4 11. Qxe4 Nf6 12. Qd3 cxd5 13. 0-0 Ne4 14. Bb2 Bf5 15. Qd1 Rc8 16. Ne5 Qg5 17. f4 Qe7 18. g4 Be6 19. f5 f6 20. fxe6 fxe5 21. dxe5 Rxf1+ 22. Bxf1 Bc5 23. Bd4 Qxe6 24. Rc1 b6 25. Bg2 Bxd4 26. Rxc8+ Qxc8 27. Qxd4 Qc1+ 28. Bf1 Kf8 29. e6 Qc3 30. Qxc3 Nxc3 31. Bd3 h5 32. a3 hxg4 33. Kf2 Ke7 34. Kg3 Nd1 35. Kf4 Kxe6 36. Bf5+ Kf6 37. Bxg4 g5+ 38. Kf3 Nc3 39. Kg3 Ke5 40. Bf3 Kf5 41. Bg2 d4 42. exd4 Ne2+ 43. Kf2 Nxd4 44. Bd5 Kf4 45. a4 a5 46. Bc4 Nf3 47. Kg2 Ne5 48. Be6 Nd3 49. Bg8 Kg4 50. Be6+ Kh4 51. Bc4 Nf4+ 52. Kf3 Kh3 53. Bf1+ Kxh2 54. Kg4 Nd5 55. Kxg5 Kg3 56. Bc4 Ne3 57. Bd3 Kf3 58. Kf6 Ng2 59. Ke5 Ke3 60. Bf1 Nf4 1/2-1/2

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2023.06.16"]
[Round "4"]
[White "Niemann, Hans Moke"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2695"]
[BlackElo "2538"]
[PlyCount "157"]
[EventDate "2023.06.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e5 7. Nb3 Be7 8. g4 h6 9. Be3 b5 10. a4 bxa4 11. Rxa4 Bd7 12. Ra1 Nc6 13. Nd5 0-0 14. c3 a5 15. Nd2 Rb8 16. Nc4 Nxe4 17. Bg2 Nc5 18. Nxe7+ Qxe7 19. Qxd6 Qxd6 20. Nxd6 Nd3+ 21. Ke2 Nf4+ 22. Bxf4 exf4 23. Rhb1 Rfd8 24. Kf1 h5 25. Nf5 hxg4 26. hxg4 Ne5 27. Kg1 f3 28. Bf1 a4 29. Ne3 Rb6 30. Rd1 Rdb8 31. Rd5 f6 32. Nc4 Nxc4 33. Bxc4 Be6 34. Rxa4 Rxb2 35. Rd3 Bxc4 36. Rxc4 Kh7 37. Rxf3 Rc2 38. Rc7 Kg6 39. Kg2 Rb1 40. Rd7 Rb5 41. Rc7 Rb3 42. Kg3 Kh6 43. Rc6 Kg6 44. Re3 Rbb2 45. f3 Rb7 46. Kf4 Kf7 47. Rc5 Rd7 48. Re4 Rcd2 49. Rec4 Re7 50. Rd4 g5+ 51. Kf5 Rde2 52. f4 Rf2 53. c4 gxf4 54. Rd6 f3 55. Rxf6+ Kg7 56. Kg5 Rf1 57. Rcf5 Rc7 58. Rg6+ Kh7 59. Rd6 f2 60. Rd2 Rc1 61. Rdxf2 R1xc4 62. Kh5 R7c5 63. Rg2 Kg7 64. Kg5 Rxf5+ 65. gxf5 Rc6 66. Ra2 Kf7 67. Ra7+ Kf8 68. Rh7 Ra6 69. Rh6 Rxh6 70. Kxh6 Kf7 71. Kg5 Kg7 72. f6+ Kf7 73. Kf5 Kf8 74. Ke6 Ke8 75. Ke5 Kf7 76. Kf5 Kf8 77. Kg6 Kg8 78. f7+ Kf8 79. Kf6 1/2-1/2

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2023.06.15"]
[Round "2"]
[White "Atwell, Rose"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "2220"]
[BlackElo "2538"]
[PlyCount "110"]
[EventDate "2023.06.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. h3 g6 7. Nf3 Bf5 8. 0-0 Bxd3 9. Qxd3 Qc7 10. Nbd2 Bg7 11. Re1 0-0 12. Ne5 Nxe5 13. dxe5 Nd7 14. Nf3 e6 15. Bf4 Rab8 16. Nd4 Rfc8 17. a4 a6 18. Qe2 Qc4 19. Qe3 Nc5 20. Bh6 Bh8 21. Re2 Nb3 22. Ra3 Nxd4 23. cxd4 Rc6 24. Rd2 Bg7 25. Bxg7 Kxg7 26. h4 Qc1+ 27. Kh2 Qb1 28. h5 Qf5 29. h6+ Kg8 30. Rc3 Rbc8 31. Rdc2 Rxc3 32. Rxc3 Rxc3 33. Qxc3 Qf4+ 34. Kg1 Qxh6 35. g3 Kg7 36. Kg2 Qh5 37. Qb4 Qd1 38. a5 Qa1 39. Qb6 Qa4 40. b3 Qd7 41. Kg1 h5 42. Kg2 Kf8 43. Qa7 Qc7 44. Qa8+ Kg7 45. Qa7 g5 46. b4 Qc8 47. Qb6 h4 48. gxh4 gxh4 49. Qd6 Qc1 50. Qe7 Qf4 51. Kh3 Kg6 52. Qd8 Kf5 53. Qg8 Qf3+ 54. Kh2 Qxf2+ 55. Kh1 Qf3+ 0-1

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2023.06.15"]
[Round "3"]
[White "Matviishen, Viktor"]
[Black "Jiang, Lucas"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "2538"]
[BlackElo "2352"]
[PlyCount "59"]
[EventDate "2023.06.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Bd2 Bg7 6. e4 Nb6 7. Be3 0-0 8. a4 a5 9. h3 c6 10. Nf3 Na6 11. Be2 Be6 12. 0-0 Nb4 13. Ng5 Bc4 14. Rc1 h6 15. Nf3 Rc8 16. b3 Bxe2 17. Qxe2 e6 18. Rfd1 Nd7 19. e5 Nb6 20. Ne4 N6d5 21. Bd2 Qe7 22. Nh2 f5 23. exf6 Nxf6 24. Nxf6+ Qxf6 25. Ng4 Qe7 26. Bxh6 Nd5 27. Bxg7 Kxg7 28. Re1 Rce8 29. Qd2 Nf4 30. Rc5 1-0

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2023.06.14"]
[Round "1"]
[White "Matviishen, Viktor"]
[Black "Yanayt, Eugene"]
[Result "1-0"]
[ECO "E73"]
[WhiteElo "2538"]
[BlackElo "2060"]
[PlyCount "46"]
[EventDate "2023.06.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Be3 a6 7. h3 c6 8. e5 Ne8 9. f4 b5 10. h4 Nd7 11. h5 Bb7 12. Nf3 Nc7 13. c5 dxc5 14. dxc5 Ne6 15. Ne4 Qa5+ 16. Kf2 Rad8 17. Qc2 Bc8 18. Rh4 Rfe8 19. g4 Qc7 20. hxg6 hxg6 21. Rah1 a5 22. R1h3 a4 23. Qb1 Nef8 1-0

[Event "CAN Transnational Classic"]
[Site "Montreal"]
[Date "2023.06.11"]
[Round "9"]
[White "Matviishen, Viktor"]
[Black "Kantans, Toms"]
[Result "0-1"]
[ECO "D85"]
[WhiteElo "2538"]
[BlackElo "2486"]
[PlyCount "124"]
[EventDate "2023.06.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Bd2 Nb6 6. e3 Bg7 7. h4 h5 8. Nf3 0-0 9. Ng5 N8d7 10. g4 Nf6 11. gxh5 Bg4 12. Be2 Bxh5 13. Bxh5 Nxh5 14. Qb3 c5 15. dxc5 Nd7 16. Nce4 Qc7 17. Rc1 Qc6 18. Rg1 Rad8 19. f4 Ndf6 20. Qc4 Nxe4 21. Qxe4 Rd5 22. Qc4 Bxb2 23. Rc2 Bg7 24. Ke2 e6 25. Nf3 Rc8 26. Rg5 Bf6 27. Rxd5 exd5 28. Qb3 Qe6 29. Kd1 Qe4 30. Ng5 Qh1+ 31. Be1 Re8 32. Rf2 Re7 33. f5 Qxh4 34. Rg2 Qc4 35. fxg6 fxg6 36. Qxc4 dxc4 37. Bd2 c3 38. Bc1 Kg7 39. Kc2 Bxg5 40. Rxg5 Nf6 41. Rg1 Ne4 42. Ba3 Rd7 43. Rg4 Nf6 44. Rg2 Nd5 45. Rg3 Nf6 46. Rg2 Kf7 47. Rf2 Ke6 48. Rg2 Rd2+ 49. Rxd2 cxd2 50. Kxd2 Kd5 51. Ke2 Ke4 52. Bb2 Nd5 53. Bd4 a6 54. a3 Nc7 55. Bf6 Nd5 56. Bd4 g5 57. Kf2 g4 58. c6 bxc6 59. Bc5 Kf5 60. Ke2 Ke4 61. Kf2 Nf6 62. Ke2 Kd5 0-1

[Event "CAN Transnational Classic"]
[Site "Montreal"]
[Date "2023.06.11"]
[Round "8"]
[White "Rodrigue Lemieux, Shawn"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "C47"]
[WhiteElo "2469"]
[BlackElo "2538"]
[PlyCount "17"]
[EventDate "2023.06.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 d5 8. exd5 cxd5 9. 0-0 1/2-1/2

[Event "CAN Transnational Classic"]
[Site "Montreal"]
[Date "2023.06.10"]
[Round "6"]
[White "Almeida Quintana, Omar"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "E15"]
[WhiteElo "2520"]
[BlackElo "2538"]
[PlyCount "88"]
[EventDate "2023.06.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 b6 4. g3 Ba6 5. Qa4 Bb7 6. Bg2 c5 7. dxc5 Bxc5 8. Nc3 0-0 9. 0-0 Be7 10. Rd1 Na6 11. Bf4 Nc5 12. Qc2 h6 13. Rd4 d5 14. Rad1 Qc8 15. Ne5 dxc4 16. Nxc4 Bxg2 17. Kxg2 Qc6+ 18. f3 Rfd8 19. Ne5 Qb7 20. Rxd8+ Rxd8 21. Rxd8+ Bxd8 22. Nb5 Be7 23. b4 Na6 24. a3 Nb8 25. Qd3 Nd5 26. e4 Nxf4+ 27. gxf4 Nc6 28. Qc4 Nxe5 29. fxe5 Bg5 30. Kg3 Bd8 31. Qc1 Qe7 32. Kg2 Qh4 33. Nxa7 Bg5 34. Qg1 Qf4 35. Qxb6 Qc1 36. Qc5 Qxa3 37. Nc6 Kh7 38. Qc2 Be3 39. b5 Qa1 40. Qe2 Qg1+ 41. Kh3 g5 42. Nb4 h5 43. Nd3 Kh6 44. Ne1 Bf4 0-1

[Event "CAN Transnational Classic"]
[Site "Montreal"]
[Date "2023.06.10"]
[Round "7"]
[White "Matviishen, Viktor"]
[Black "Preotu, Razvan"]
[Result "1-0"]
[ECO "C07"]
[WhiteElo "2538"]
[BlackElo "2475"]
[PlyCount "99"]
[EventDate "2023.06.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 cxd4 5. exd5 Qxd5 6. Bc4 Qd6 7. 0-0 Nf6 8. Nb3 Nc6 9. Nbxd4 Nxd4 10. Nxd4 Be7 11. b3 0-0 12. Bb2 a6 13. Qf3 Nd7 14. Rad1 Qc5 15. Rfe1 Bf6 16. Qg3 Qh5 17. Ba3 Re8 18. Nf3 Qa5 19. Bd6 Qxa2 20. Bd3 Nf8 21. Ne5 Ng6 22. Nc4 b5 23. Nb6 Ra7 24. Qe3 Rd7 25. Nxd7 Bxd7 26. Bxg6 hxg6 27. Be5 Bc8 28. Qc3 Bxe5 29. Rxe5 b4 30. Ra1 bxc3 31. Rxa2 Rd8 32. Ra1 Rd5 33. Re3 e5 34. Rxc3 Bf5 35. h3 a5 36. Kf1 g5 37. Ke2 g4 38. hxg4 Bxg4+ 39. f3 Bf5 40. Rd1 Rb5 41. Rd6 f6 42. Rdc6 Rb8 43. Ra6 Rb5 44. Rc7 Kh7 45. Kd2 Kh6 46. Rca7 Rd5+ 47. Kc1 Rd4 48. Rxa5 Rh4 49. Rd5 g6 50. g4 1-0

[Event "CAN Transnational Classic"]
[Site "Montreal"]
[Date "2023.06.09"]
[Round "5"]
[White "Matviishen, Viktor"]
[Black "Roussel Roozmon, Thomas"]
[Result "1/2-1/2"]
[ECO "D35"]
[WhiteElo "2538"]
[BlackElo "2462"]
[PlyCount "80"]
[EventDate "2023.06.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. e3 Bf5 7. Qf3 Bg6 8. Bxf6 Qxf6 9. Qxf6 gxf6 10. Nge2 Nd7 11. h4 h6 12. Nf4 Nb6 13. Nxg6 fxg6 14. Bd3 Kf7 15. h5 g5 16. 0-0 Rd8 17. Rab1 a5 18. a3 Bd6 19. b4 axb4 20. axb4 Nc8 21. Na4 b5 22. Nc5 Bxc5 23. dxc5 Ne7 24. Ra1 Ra8 25. g4 Ke6 26. f4 Rhg8 27. Bh7 Rh8 28. Bg6 Rxa1 29. Rxa1 f5 30. gxf5+ Nxf5 31. Ra6 Ne7 32. fxg5 hxg5 33. Kg2 Ke5 34. Kg3 d4 35. exd4+ Kxd4 36. Ra7 Nxg6 37. hxg6 Rg8 38. Rd7+ Kc4 39. Rd6 Kxb4 40. Rxc6 Kc4 1/2-1/2

[Event "CAN Transnational Classic"]
[Site "Montreal"]
[Date "2023.06.09"]
[Round "4"]
[White "Moradiabadi, Elshan"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "E15"]
[WhiteElo "2520"]
[BlackElo "2538"]
[PlyCount "115"]
[EventDate "2023.06.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Nbd2 Bb4 6. Qc2 Bb7 7. Bg2 Be4 8. Qb3 Bxd2+ 9. Bxd2 0-0 10. 0-0 d6 11. Rfd1 Qe7 12. Rac1 Nbd7 13. Bh3 Bf5 14. Bg2 Be4 15. Bh3 Bf5 16. Bf1 h6 17. Nh4 Bh7 18. Ng2 e5 19. dxe5 dxe5 20. Ne3 c6 21. Bb4 Nc5 22. Qa3 Rfd8 23. Bxc5 bxc5 24. Qa4 Qb7 25. b3 Rd4 26. Bg2 Ne4 27. Qa5 Qb6 28. Qe1 Qb4 29. Qxb4 cxb4 30. Bxe4 Bxe4 31. f3 Bg6 32. c5 Rad8 33. Rxd4 Rxd4 34. Nc4 f6 35. Kf2 Kf8 36. Na5 Be8 37. Rc2 Ke7 38. e3 Rd8 39. e4 Rb8 40. Nc4 Bf7 41. Nd6 Be6 42. f4 a5 43. Ke3 exf4+ 44. gxf4 a4 45. bxa4 Ra8 46. f5 Bg8 47. Rg2 Kf8 48. Rd2 Rxa4 49. Nc8 Ke8 50. Nd6+ Kd7 51. Rg2 Bxa2 52. Rxg7+ Kd8 53. e5 fxe5 54. f6 b3 55. Nb7+ Kc8 56. Nd6+ Kd8 57. Nb7+ Kc8 58. Nd6+ 1/2-1/2

[Event "CAN Transnational op"]
[Site "Montreal"]
[Date "2023.06.08"]
[Round "3"]
[White "Matviishen, Viktor"]
[Black "Posthuma, Joshua G"]
[Result "1-0"]
[ECO "B30"]
[WhiteElo "2538"]
[BlackElo "2457"]
[PlyCount "55"]
[EventDate "2023.06.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 e5 4. 0-0 Bd6 5. c3 a6 6. Ba4 b5 7. Bc2 Nge7 8. d3 0-0 9. a4 Rb8 10. Be3 Ng6 11. axb5 axb5 12. Bb3 Na5 13. Ba2 b4 14. Nbd2 Ba6 15. Ng5 Be7 16. Qh5 Bxg5 17. Bxg5 Qb6 18. Bd5 bxc3 19. bxc3 Bxd3 20. Rfe1 c4 21. Be3 Qc7 22. Nf3 Ne7 23. Qxe5 d6 24. Bxf7+ Rxf7 25. Qxa5 Qxa5 26. Rxa5 Bxe4 27. Ng5 Rf5 28. Ra7 1-0

[Event "CAN Transnational op"]
[Site "Montreal"]
[Date "2023.06.07"]
[Round "2"]
[White "Woodward, Andy"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "E15"]
[WhiteElo "2466"]
[BlackElo "2538"]
[PlyCount "71"]
[EventDate "2023.06.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qc2 c5 6. d5 exd5 7. cxd5 Bb7 8. Bg2 Nxd5 9. 0-0 Be7 10. Qe4 Bc6 11. Ne5 Nf6 12. Nxc6 Nxc6 13. Qa4 Rc8 14. Nc3 0-0 15. Bf4 d5 16. Rad1 Qe8 17. Nxd5 Nd4 18. Nxe7+ Qxe7 19. Rfe1 Rcd8 20. e3 b5 21. exd4 Qxe1+ 22. Rxe1 bxa4 23. dxc5 Rfe8 24. Rxe8+ Rxe8 25. c6 Rc8 26. Kf1 Kf8 27. Ke2 Ke7 28. Kd3 Ng4 29. Kc4 f6 30. Kc5 Nxf2 31. Bf1 Ne4+ 32. Kd5 a3 33. bxa3 Nc3+ 34. Kc5 Ne4+ 35. Kd5 Nc3+ 36. Kc5 1/2-1/2

[Event "CAN Transnational op"]
[Site "Montreal"]
[Date "2023.06.06"]
[Round "1"]
[White "Matviishen, Viktor"]
[Black "Tanaka, Taira Tyler"]
[Result "1-0"]
[ECO "E49"]
[WhiteElo "2538"]
[BlackElo "2315"]
[PlyCount "51"]
[EventDate "2023.06.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 dxc4 8. Bxc4 c5 9. Bd3 Qc7 10. Bb2 c4 11. Bc2 e5 12. Ne2 Re8 13. 0-0 b5 14. a4 bxa4 15. Ba3 Bb7 16. Ng3 g6 17. e4 Nbd7 18. d5 Nc5 19. Bxa4 Red8 20. Bc2 a5 21. Rb1 Ba6 22. Qd2 Ne6 23. Qh6 Ng7 24. Qg5 Nfe8 25. f4 f6 26. fxe5 1-0

[Event "CAN Transnational Rapid"]
[Site "Toronto"]
[Date "2023.06.04"]
[Round "4"]
[White "Bareev, Evgeny"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "D23"]
[WhiteElo "2631"]
[BlackElo "2538"]
[PlyCount "116"]
[EventDate "2023.06.03"]
[EventType "swiss (rapid)"]
[EventRounds "11"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qc2 dxc4 5. Qxc4 Bf5 6. g3 e6 7. Bg2 Nbd7 8. 0-0 Be7 9. e3 0-0 10. Qe2 h6 11. Nc3 Ne4 12. Nd2 Nxd2 13. Bxd2 e5 14. d5 Nf6 15. e4 Bg4 16. f3 Bd7 17. dxc6 Bxc6 18. Be3 Qa5 19. a3 Bc5 20. b4 Bxe3+ 21. Qxe3 Qb6 22. Qxb6 axb6 23. Kf2 Rfd8 24. Ke3 Rd4 25. Rfc1 Ne8 26. Bf1 Nd6 27. Ne2 Rc4 28. Nc3 Rd4 29. Ne2 Rc4 30. Rd1 Nb5 31. a4 Nc7 32. b5 Be8 33. Rdc1 Rxc1 34. Rxc1 Ne6 35. Nc3 Rc8 36. Bh3 Bd7 37. Kd2 Rc4 38. Bf1 Rd4+ 39. Ke3 Nc5 40. Nd5 Nxa4 41. Rc7 Be6 42. Rxb7 Bxd5 43. exd5 Nc3 44. d6 Nd1+ 45. Ke2 Rxd6 46. Rc7 Kf8 47. Rc2 Ke7 48. Bh3 g6 49. Bc8 f5 50. h4 f4 51. gxf4 exf4 52. Rc4 g5 53. hxg5 hxg5 54. Bf5 Ne3 55. Rc7+ Kf6 56. Be4 Ke5 57. Rg7 g4 58. Rg5+ Kd4 0-1

[Event "CAN Transnational Rapid"]
[Site "Toronto"]
[Date "2023.06.04"]
[Round "9"]
[White "Bruzon Batista, Lazaro"]
[Black "Matviishen, Viktor"]
[Result "1-0"]
[ECO "D77"]
[WhiteElo "2617"]
[BlackElo "2538"]
[PlyCount "118"]
[EventDate "2023.06.03"]
[EventType "swiss (rapid)"]
[EventRounds "11"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. d4 Nf6 5. 0-0 0-0 6. c4 dxc4 7. Na3 c5 8. dxc5 c3 9. Nb5 Na6 10. Nxc3 Nxc5 11. Be3 Nfe4 12. Nxe4 Nxe4 13. Bd4 Bf5 14. Bxg7 Qxd1 15. Rfxd1 Kxg7 16. Nd4 Nd6 17. Nxf5+ gxf5 18. Rac1 Rac8 19. Kf1 Kf6 20. e3 a5 21. Ke1 Rfd8 22. Bf1 b5 23. Bd3 b4 24. Ba6 Rxc1 25. Rxc1 Ra8 26. Rc6 Ke6 27. Bd3 Kd7 28. Rc5 e6 29. Kd2 Nb7 30. Rc4 h6 31. Rh4 Rh8 32. e4 fxe4 33. Bxe4 Nd6 34. Bd3 f5 35. h3 e5 36. g4 fxg4 37. hxg4 Rf8 38. Ke3 Rf6 39. f3 Kc6 40. Rh1 Kd5 41. b3 Re6 42. Rc1 Re7 43. Rh1 Rc7 44. Rxh6 Rc3 45. Kd2 e4 46. Rh5+ Kd4 47. Bxe4 Nxe4+ 48. fxe4 a4 49. Rb5 Rd3+ 50. Kc2 Rc3+ 51. Kb1 a3 52. Rxb4+ Ke3 53. Rc4 Rd3 54. b4 Rd2 55. Rc3+ Kxe4 56. Rxa3 Kd4 57. Rb3 Rg2 58. b5 Rxg4 59. Rb4+ Kd5 1-0

[Event "CAN Transnational Rapid"]
[Site "Toronto"]
[Date "2023.06.04"]
[Round "6"]
[White "Liang, Awonder"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2651"]
[BlackElo "2538"]
[PlyCount "42"]
[EventDate "2023.06.03"]
[EventType "swiss (rapid)"]
[EventRounds "11"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. b4 d5 2. Bb2 Bg4 3. h4 h6 4. a3 Nd7 5. f3 Bf5 6. e3 e6 7. c4 a5 8. b5 Bd6 9. Kf2 dxc4 10. e4 Be5 11. Bc3 Bh7 12. Bxc4 Bxc3 13. dxc3 Ngf6 14. Nh3 0-0 15. Qd4 e5 16. Qe3 Bxe4 17. Nd2 Bf5 18. g4 Be6 19. g5 Bxc4 20. gxf6 Qxf6 21. Nxc4 Qxh4+ 0-1

[Event "CAN Transnational Rapid"]
[Site "Toronto"]
[Date "2023.06.04"]
[Round "10"]
[White "Matviishen, Viktor"]
[Black "Almeida Quintana, Omar"]
[Result "0-1"]
[ECO "B08"]
[WhiteElo "2538"]
[BlackElo "2520"]
[PlyCount "102"]
[EventDate "2023.06.03"]
[EventType "swiss (rapid)"]
[EventRounds "11"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 d6 2. Nf3 Nf6 3. Nc3 g6 4. e4 Bg7 5. h3 c6 6. Be3 0-0 7. Qd2 Qa5 8. Bd3 e5 9. 0-0 Re8 10. dxe5 dxe5 11. Bc4 Be6 12. Bxe6 Rxe6 13. Qe2 Nbd7 14. a4 Ree8 15. Nd2 Nh5 16. Nc4 Qc7 17. g3 Bf8 18. Rfd1 Nc5 19. Rd2 Rad8 20. a5 Rxd2 21. Nxd2 b5 22. axb6 axb6 23. Nf3 Nf6 24. Bg5 Nfd7 25. Be3 Nf6 26. Bg5 Nfd7 27. Rd1 b5 28. Nh2 Ne6 29. Be3 Nf6 30. Qf3 Be7 31. Ne2 Ra8 32. c3 Kg7 33. Kg2 h5 34. g4 hxg4 35. Nxg4 Nh5 36. Kh2 Rh8 37. Rg1 Ng5 38. Bxg5 Bxg5 39. Ne3 Bxe3 40. fxe3 Qe7 41. Nc1 Nf6 42. Nd3 Rd8 43. Rd1 c5 44. b4 cxb4 45. cxb4 Qa7 46. Rf1 Rxd3 47. Qxf6+ Kg8 48. Qxe5 Qa2+ 49. Kg1 Rxe3 50. Rd1 Kh7 51. Qd5 Rg3+ 0-1

[Event "CAN Transnational Rapid"]
[Site "Toronto"]
[Date "2023.06.04"]
[Round "5"]
[White "Matviishen, Viktor"]
[Black "Cruz, Cristhian"]
[Result "0-1"]
[ECO "D37"]
[WhiteElo "2538"]
[BlackElo "2522"]
[PlyCount "162"]
[EventDate "2023.06.03"]
[EventType "swiss (rapid)"]
[EventRounds "11"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nc3 a6 4. cxd5 exd5 5. Nf3 Nf6 6. Bg5 Be6 7. e3 c6 8. Qb3 b5 9. Bxf6 Qxf6 10. a4 b4 11. Ne2 Nd7 12. Nf4 Bd6 13. Rc1 Bxf4 14. exf4 Qxf4 15. Rxc6 0-0 16. Qe3 Qxe3+ 17. fxe3 Rfc8 18. Rxc8+ Rxc8 19. Kd2 Bf5 20. Ne1 Nf6 21. Bxa6 Ne4+ 22. Ke2 Bg4+ 23. Kf1 Rc1 24. Bb7 Nd2+ 25. Kf2 Ne4+ 26. Kf1 Be6 27. a5 Bd7 28. g4 Ra1 29. Bxd5 Nf6 30. Bc4 Rxa5 31. h3 Ne4 32. Rh2 Ra1 33. Bd3 Nd6 34. Rc2 g6 35. e4 Bb5 36. Bxb5 Nxb5 37. Rc4 Nd6 38. Rxb4 Nxe4 39. d5 Nc5 40. Rd4 Kf8 41. b4 Nd7 42. Ke2 Ra2+ 43. Rd2 Ra3 44. Nf3 Rb3 45. Rd4 Ke7 46. d6+ Ke6 47. Ng5+ Ke5 48. Rd2 f6 49. Nf3+ Kf4 50. Rd4+ Kg3 51. Nd2 Rb2 52. Rd3+ Kf4 53. Re3 Rxb4 54. Re7 Ne5 55. Rxh7 Rd4 56. Nb3 Rxd6 57. Nc5 Rc6 58. Nd3+ Nxd3 59. Kxd3 Re6 60. Rg7 g5 61. Rh7 Re3+ 62. Kd4 Re1 63. Kd5 Kg3 64. Rh6 Rh1 65. Rxf6 Rxh3 66. Ke4 Kxg4 67. Rf1 Kh4 68. Kf5 g4 69. Kf4 Rh2 70. Ke3 Kg3 71. Rg1+ Kh3 72. Rf1 Ra2 73. Rf8 Kg2 74. Rg8 g3 75. Rc8 Ra3+ 76. Ke2 Ra7 77. Re8 Kg1 78. Kf3 g2 79. Rg8 Rf7+ 80. Ke2 Re7+ 81. Kf3 Kf1 0-1

[Event "CAN Transnational Rapid"]
[Site "Toronto"]
[Date "2023.06.04"]
[Round "7"]
[White "Matviishen, Viktor"]
[Black "Moradiabadi, Elshan"]
[Result "1/2-1/2"]
[ECO "E45"]
[WhiteElo "2538"]
[BlackElo "2520"]
[PlyCount "77"]
[EventDate "2023.06.03"]
[EventType "swiss (rapid)"]
[EventRounds "11"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Ba6 6. a3 Be7 7. Nf4 0-0 8. d5 Bd6 9. Be2 c6 10. e4 Qc7 11. g3 Be5 12. 0-0 Bxc3 13. d6 Qd8 14. bxc3 Nxe4 15. Nh5 Nxc3 16. Qc2 Nxe2+ 17. Qxe2 f6 18. Qg4 Rf7 19. Qe4 f5 20. Qe2 c5 21. Bb2 Nc6 22. h4 Qf8 23. Rfd1 Re8 24. Nf4 Bb7 25. Be5 Nxe5 26. Qxe5 g6 27. a4 Qg7 28. Nd3 Qh6 29. Qf4 Qh5 30. Ne5 Rg7 31. Qg5 Rf8 32. a5 Qe2 33. Re1 Qb2 34. axb6 axb6 35. Rab1 Qd4 36. Rbd1 Qb2 37. Rb1 Qd4 38. Rbd1 Qb2 39. Rb1 1/2-1/2

[Event "CAN Transnational Rapid"]
[Site "Toronto"]
[Date "2023.06.04"]
[Round "11"]
[White "Posthuma, Joshua G"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "D11"]
[WhiteElo "2457"]
[BlackElo "2538"]
[PlyCount "88"]
[EventDate "2023.06.03"]
[EventType "swiss (rapid)"]
[EventRounds "11"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nbd2 Bf5 5. Nh4 Be4 6. f3 Bg6 7. Qb3 Qc7 8. e4 dxe4 9. Nxg6 hxg6 10. fxe4 e5 11. dxe5 Ng4 12. Nf3 Na6 13. Bd2 0-0-0 14. Be2 Bc5 15. Rf1 Rxd2 16. Kxd2 Rd8+ 17. Kc1 Ne3 18. Rg1 Nb4 19. a3 Nec2 20. axb4 Nxa1 21. Qa4 Bxg1 22. Nxg1 Qxe5 23. Qxa1 Qd4 24. Kc2 Qxe4+ 25. Kb3 Rd2 26. Bf1 Qe3+ 27. Ka2 Qxg1 28. Qe1 Qf2 29. Qc1 Rc2 30. Qb1 Qd2 31. Kb3 Rc1 32. Qd3 Qxd3+ 33. Bxd3 Kd7 34. c5 b6 35. cxb6 axb6 36. h3 Kd6 37. Be4 Ke5 38. Bf3 Kd4 39. Ka2 f5 40. b3 Kc3 41. Bxc6 Kxb4 42. Bd5 Rc2+ 43. Kb1 Rd2 44. Bf7 Rxg2 0-1

[Event "CAN Transnational Rapid"]
[Site "Toronto"]
[Date "2023.06.04"]
[Round "8"]
[White "Rodrigue Lemieux, Shawn"]
[Black "Matviishen, Viktor"]
[Result "1-0"]
[ECO "B52"]
[WhiteElo "2469"]
[BlackElo "2538"]
[PlyCount "55"]
[EventDate "2023.06.03"]
[EventType "swiss (rapid)"]
[EventRounds "11"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 e5 6. Nc3 Nc6 7. d3 g6 8. a3 Bg7 9. b4 cxb4 10. axb4 Nxb4 11. Ba3 Nc6 12. Nb5 Bf8 13. d4 a6 14. Nc3 exd4 15. Nd5 Qd8 16. 0-0 Nf6 17. Re1 Nd7 18. Rb1 Rb8 19. Nxd4 Nce5 20. Qa4 Be7 21. f4 Nd3 22. Re3 N3c5 23. Bxc5 dxc5 24. Nf5 gxf5 25. exf5 Kf8 26. Rxe7 Nf6 27. Qa1 Nxd5 28. Rexb7 1-0

[Event "CAN Transnational Rapid"]
[Site "Toronto"]
[Date "2023.06.03"]
[Round "2"]
[White "Kantans, Toms"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "B52"]
[WhiteElo "2486"]
[BlackElo "2538"]
[PlyCount "116"]
[EventDate "2023.06.03"]
[EventType "swiss (rapid)"]
[EventRounds "11"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. a4 Nf6 5. Qe2 Nc6 6. 0-0 e6 7. d3 Be7 8. Bf4 0-0 9. h3 Rc8 10. Nbd2 Nd4 11. Nxd4 cxd4 12. Bc4 e5 13. Bg5 Be6 14. f4 exf4 15. Bxf4 d5 16. Bb3 dxe4 17. Bxe6 fxe6 18. Nxe4 Nd5 19. Bd2 Rxc2 20. Qg4 Rc6 21. Bh6 Rxf1+ 22. Rxf1 Bf8 23. Bg5 Qe8 24. Ng3 Qg6 25. Qf3 Rc8 26. h4 h6 27. Bd2 Ne3 28. Bxe3 dxe3 29. Ne4 Be7 30. Qxe3 Bxh4 31. Rc1 Rxc1+ 32. Qxc1 Qf7 33. b4 Kh7 34. b5 Bd8 35. Qd1 Bb6+ 36. Kh1 Qf4 37. g3 Qe3 38. Kg2 Qd4 39. Kh3 g6 40. Qf3 Kg7 41. Nd2 Qd5 42. Ne4 Bd4 43. Qf4 Qf5+ 44. Kg2 Be5 45. Qc1 Qf7 46. Qc5 Bb8 47. Qd4+ e5 48. Qd8 Bc7 49. Qc8 Bb6 50. Qc3 Bd4 51. Qc8 b6 52. Qd8 h5 53. Qd6 g5 54. Qd8 g4 55. Qg5+ Kf8 56. Qd8+ Kg7 57. Qg5+ Kf8 58. Qd8+ Kg7 1/2-1/2

[Event "CAN Transnational Rapid"]
[Site "Toronto"]
[Date "2023.06.03"]
[Round "3"]
[White "Matviishen, Viktor"]
[Black "Samsonkin, Artiom"]
[Result "1-0"]
[ECO "E14"]
[WhiteElo "2538"]
[BlackElo "2420"]
[PlyCount "73"]
[EventDate "2023.06.03"]
[EventType "swiss (rapid)"]
[EventRounds "11"]
[EventCountry "CAN"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 e6 2. c4 Nf6 3. Nf3 Bb4+ 4. Nbd2 b6 5. a3 Bxd2+ 6. Qxd2 Bb7 7. e3 0-0 8. Be2 d5 9. b3 Nbd7 10. Bb2 c5 11. 0-0 dxc4 12. bxc4 cxd4 13. exd4 Rc8 14. Rac1 Qc7 15. Qg5 h6 16. Qh4 Rfe8 17. Rfe1 Qd8 18. Red1 Qe7 19. Qf4 Nh5 20. Qe3 Nhf6 21. a4 Qb4 22. Bc3 Qxa4 23. Ra1 Qc6 24. Rxa7 Ra8 25. Rda1 Rxa7 26. Rxa7 Ra8 27. Rxa8+ Bxa8 28. Bf1 Qa4 29. Ne5 Nxe5 30. Qxe5 Qc2 31. d5 Kh7 32. Qg3 Qc1 33. Bxf6 gxf6 34. Qd3+ f5 35. dxe6 fxe6 36. Qd7+ Kg6 37. Qe8+ 1-0

[Event "Dulles Cherry Blossom op 10th"]
[Site "Dulles"]
[Date "2023.05.29"]
[Round "9"]
[White "Durarbayli, Vasif"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "B92"]
[WhiteElo "2627"]
[BlackElo "2538"]
[PlyCount "112"]
[EventDate "2023.05.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. 0-0 0-0 9. Re1 Be6 10. Bf3 Qc7 11. Be3 Rc8 12. a4 h6 13. a5 Nbd7 14. h3 b5 15. axb6 Nxb6 16. Na5 Nc4 17. Nxc4 Bxc4 18. Na4 Rab8 19. b3 Bb5 20. c4 Bxa4 21. Rxa4 Qb7 22. Qa1 Qxb3 23. Rc1 a5 24. Rxa5 Rxc4 25. Rxc4 Qxc4 26. Ra8 Rxa8 27. Qxa8+ Kh7 28. Qb7 Bd8 29. Qa8 Qc7 30. g3 g6 31. Kg2 Kg7 32. h4 Be7 33. Kg1 Qc2 34. Qb7 Bd8 35. Qb8 Qc7 36. Qa8 Qd7 37. Bg2 Be7 38. Bf3 h5 39. Bg5 Ne8 40. Be3 Qb5 41. Qc8 Nf6 42. Bg5 Ng8 43. Be3 Qb3 44. Kg2 Qe6 45. Qb7 Nf6 46. Bd1 Qd7 47. Qxd7 Nxd7 48. Kh3 Nf6 49. f3 Ng8 50. g4 Nf6 51. Bc2 Nh7 52. gxh5 gxh5 53. f4 Nf6 54. f5 Ng4 55. Bb6 Nf6 56. Be3 Ng4 1/2-1/2

[Event "Dulles Cherry Blossom op 10th"]
[Site "Dulles"]
[Date "2023.05.29"]
[Round "8"]
[White "Matviishen, Viktor"]
[Black "Tanenbaum, Zachary Chen"]
[Result "1-0"]
[ECO "D20"]
[WhiteElo "2538"]
[BlackElo "2261"]
[PlyCount "61"]
[EventDate "2023.05.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 Nc6 5. Nf3 e4 6. Nfd2 Qg5 7. Nxe4 Qxg2 8. Ng3 Qh3 9. Qb3 Nf6 10. Bxf7+ Kd8 11. Nc3 Bd6 12. Bd2 Rf8 13. 0-0-0 Na5 14. Qa4 Rxf7 15. Qxa5 Bg4 16. Rde1 Bf3 17. Rhf1 Bg2 18. Rg1 Bxg3 19. hxg3 Kd7 20. e4 Re8 21. e5 Ng4 22. e6+ Rxe6 23. Rxe6 Kxe6 24. Re1+ Kd7 25. Nd5 Kd8 26. Qxa7 Bxd5 27. Qb8+ Kd7 28. Qe8+ Kd6 29. Bf4+ Rxf4 30. Qe7+ Kc6 31. Qc5+ 1-0

[Event "Dulles Cherry Blossom op 10th"]
[Site "Dulles"]
[Date "2023.05.28"]
[Round "7"]
[White "Antipov, Mikhail Al"]
[Black "Matviishen, Viktor"]
[Result "1-0"]
[ECO "D41"]
[WhiteElo "2588"]
[BlackElo "2538"]
[PlyCount "69"]
[EventDate "2023.05.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 0-0 11. Bc4 Nd7 12. 0-0 b6 13. Rad1 Bb7 14. Rfe1 Rc8 15. Bb3 Qf6 16. Re3 Rfd8 17. Qe2 h6 18. h3 Qe7 19. a3 Rc7 20. d5 Nc5 21. Ba2 Ba6 22. Qd2 exd5 23. exd5 Qf6 24. Ne5 Re7 25. Nc6 Rxe3 26. Qxe3 Rd6 27. Qe8+ Kh7 28. Ne7 h5 29. Bb1+ g6 30. Re1 Rd7 31. d6 Bb5 32. a4 Bxa4 33. Re5 Bd1 34. Rf5 Rxe7 35. Qxe7 1-0

[Event "Dulles Cherry Blossom op 10th"]
[Site "Dulles"]
[Date "2023.05.28"]
[Round "6"]
[White "Matviishen, Viktor"]
[Black "Williams, Justus D"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "2538"]
[BlackElo "2396"]
[PlyCount "77"]
[EventDate "2023.05.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 Nbd7 6. Be3 e5 7. Nf3 0-0 8. 0-0 Qe7 9. Qc2 h6 10. d5 Nh7 11. Nd2 f5 12. f3 Ndf6 13. c5 dxc5 14. b4 cxb4 15. Nb5 Ne8 16. Bc5 Qd8 17. Bxf8 Bxf8 18. Rac1 b6 19. Qc6 Bd7 20. Qxg6+ Kh8 21. f4 a6 22. Nxc7 Nxc7 23. fxe5 Bc5+ 24. Rxc5 bxc5 25. d6 Ne6 26. exf5 Nd4 27. Bc4 Qh4 28. f6 Qg5 29. Qg7+ Qxg7 30. fxg7+ Kxg7 31. Rf7+ Kg6 32. Rxd7 Nf8 33. Bd3+ Kg5 34. Rf7 Nfe6 35. Nf3+ Nxf3+ 36. gxf3 Kh4 37. Bc4 Ng5 38. Rf4+ Kh5 39. Kg2 1-0

[Event "Dulles Cherry Blossom op 10th"]
[Site "Dulles"]
[Date "2023.05.27"]
[Round "5"]
[White "Bora, Safal"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "D41"]
[WhiteElo "2462"]
[BlackElo "2538"]
[PlyCount "80"]
[EventDate "2023.05.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. c4 c5 2. Nc3 Nf6 3. Nf3 d5 4. cxd5 Nxd5 5. d4 e6 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 0-0 11. Bc4 b6 12. 0-0 Bb7 13. Rfe1 Nc6 14. Rac1 Rc8 15. h4 h6 16. h5 Qd6 17. d5 exd5 18. Bxd5 Qe7 19. Rcd1 Rcd8 20. Qc3 Na5 21. Ne5 Bxd5 22. exd5 Qd6 23. Qf3 Rde8 24. Nc6 a6 25. Nd4 Qb4 26. Rxe8 Rxe8 27. Kh2 Nc4 28. Nf5 Nd6 29. Nxd6 Qxd6+ 30. g3 Re5 31. Kg2 b5 32. Rd2 b4 33. Qf4 a5 34. Rd4 f6 35. Qc1 Qd7 36. Qd1 Qd6 37. Qa4 Qc5 38. Qd1 Qd6 39. Qa4 Qc5 40. Qd1 Qd6 1/2-1/2

[Event "Dulles Cherry Blossom op 10th"]
[Site "Dulles"]
[Date "2023.05.27"]
[Round "4"]
[White "Matviishen, Viktor"]
[Black "Sinha, Sahil"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "2538"]
[BlackElo "2317"]
[PlyCount "87"]
[EventDate "2023.05.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. e3 Nbd7 5. b3 Bb4+ 6. Nbd2 0-0 7. Bd3 c5 8. 0-0 b6 9. cxd5 Nxd5 10. Bb2 cxd4 11. Nxd4 Bb7 12. Rc1 N7f6 13. Nc4 Rc8 14. Qf3 Bc5 15. Qg3 Qe7 16. a3 a5 17. Bb1 Rfd8 18. Rfd1 Nh5 19. Qe5 Nhf6 20. Rc2 Nd7 21. Qg3 N5f6 22. Rcd2 Bd5 23. Nf5 Qf8 24. Rxd5 exd5 25. Rxd5 b5 26. Ncd6 Bxd6 27. Rxd6 Nb6 28. Kf1 Rxd6 29. Nxd6 Rd8 30. Bxf6 Nc8 31. Nf5 g6 32. Bxd8 Qxd8 33. Nd4 Nd6 34. Qe5 a4 35. bxa4 bxa4 36. Bc2 Qc7 37. Ke2 Qb6 38. Qd5 Qa6+ 39. Bd3 Qb6 40. Nb5 Nb7 41. Bc4 Nd8 42. Qd6 Qa5 43. Qc7 Qa8 44. Nd6 1-0

[Event "Dulles Cherry Blossom op 10th"]
[Site "Dulles"]
[Date "2023.05.26"]
[Round "3"]
[White "Senft, Sean"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "B14"]
[WhiteElo "2089"]
[BlackElo "2538"]
[PlyCount "88"]
[EventDate "2023.05.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. c4 Nf6 2. d4 g6 3. Nc3 d5 4. Bg5 Bg7 5. e3 c5 6. Nf3 cxd4 7. exd4 Ne4 8. Be3 Nxc3 9. bxc3 dxc4 10. Bxc4 0-0 11. Qd2 Nc6 12. 0-0 Bg4 13. Ng5 e5 14. h3 exd4 15. cxd4 Bf5 16. Rad1 Rc8 17. Rfe1 Na5 18. Bxf7+ Rxf7 19. Nxf7 Kxf7 20. Bg5 Qd5 21. Re7+ Kg8 22. Rde1 Nc6 23. Rxb7 Bd7 24. Rbb1 Nxd4 25. Be3 Bxh3 26. f3 Be6 27. Red1 Rd8 28. Qf2 Qxa2 29. Qh4 Ne2+ 30. Kh1 Re8 31. Rb7 Bf7 32. Bxa7 h6 33. Re7 Rxe7 34. Qxe7 Nf4 35. Qd8+ Kh7 36. Qd2 Qxa7 37. Qxf4 Qe7 38. Qd6 Qg5 39. Qd7 Qf4 40. Kg1 Be5 41. Qh3 h5 42. Qd7 Kg7 43. Qd2 Qh2+ 44. Kf1 Bc4+ 0-1

[Event "Dulles Cherry Blossom op 10th"]
[Site "Dulles"]
[Date "2023.05.25"]
[Round "2"]
[White "Matviishen, Viktor"]
[Black "Altman, Joshua"]
[Result "1-0"]
[ECO "E16"]
[WhiteElo "2538"]
[BlackElo "2120"]
[PlyCount "125"]
[EventDate "2023.05.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Nbd2 0-0 7. 0-0 Bxd2 8. Qxd2 d6 9. b3 Nbd7 10. Bb2 h6 11. d5 e5 12. Nh4 a5 13. f4 e4 14. Nf5 Nc5 15. Ne3 Bc8 16. h3 Ne8 17. Qe1 f5 18. g4 Bd7 19. Qg3 Nf6 20. Kh2 Qe8 21. Rg1 Qg6 22. Bf1 fxg4 23. hxg4 h5 24. f5 Nxg4+ 25. Nxg4 Qxg4 26. Qe3 Qh4+ 27. Bh3 Rf7 28. Raf1 Bxf5 29. Qc3 Qxh3+ 30. Qxh3 Bxh3 31. Rxf7 Kxf7 32. Rxg7+ Kf8 33. Kxh3 Rc8 34. Kh4 c6 35. Kxh5 cxd5 36. cxd5 Rd8 37. Rh7 Rd7 38. Rh8+ Kf7 39. Kg5 e3 40. Kf5 b5 41. Ra8 b4 42. Bd4 a4 43. bxa4 b3 44. axb3 Nxb3 45. Bxe3 Re7 46. Ra7 Rxa7 47. Bxa7 Ke7 48. Ke4 Kd7 49. Kd3 Kc7 50. Kc2 Na5 51. Kc3 Nb7 52. Kb4 Nd8 53. Kb5 Nf7 54. a5 Ng5 55. Bb6+ Kb7 56. a6+ Ka8 57. Kc6 Ne4 58. e3 Kb8 59. a7+ Ka8 60. Bd4 Ng3 61. Kxd6 Nf5+ 62. Ke6 Ng3 63. d6 1-0

[Event "Dulles Cherry Blossom op 10th"]
[Site "Dulles"]
[Date "2023.05.24"]
[Round "1"]
[White "Morefield, Jason P"]
[Black "Matviishen, Viktor"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2167"]
[BlackElo "2538"]
[PlyCount "81"]
[EventDate "2023.05.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4 h5 5. Bd3 Bxd3 6. Qxd3 Qa5+ 7. Nd2 e6 8. Ngf3 Nh6 9. 0-0 Nf5 10. c4 Be7 11. g3 Nd7 12. b3 Rd8 13. Qc2 Rg8 14. Bb2 Nf8 15. a3 Nh7 16. b4 Qb6 17. cxd5 cxd5 18. Qd3 g5 19. hxg5 Nxg5 20. Nxg5 Rxg5 21. Nf3 Rg6 22. Nh2 Kd7 23. Rfc1 Rdg8 24. Kf1 f6 25. Nf3 h4 26. gxh4 Rg4 27. exf6 Bxf6 28. Rc5 Nd6 29. Rac1 Rf8 30. a4 a5 31. Ba3 axb4 32. a5 Qd8 33. Bxb4 Rf7 34. Rb5 Ke8 35. Rb6 Ne4 36. Rxe6+ Be7 37. Qb5+ Kf8 38. Rxe7 Rxe7 39. Qxb7 Nd6 40. Bxd6 Qxd6 41. Qc8+ 1-0

[Event "Texas Collegiate Rapid"]
[Site "Lichess.org INT"]
[Date "2023.01.29"]
[Round "1"]
[White "Deleon, Carlos"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "1763"]
[BlackElo "2533"]
[PlyCount "70"]
[EventDate "2023.01.29"]
[EventType "swiss (rapid)"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e5 7. Nb3 Be6 8. Be3 Nbd7 9. Qd2 Rc8 10. 0-0-0 h5 11. Kb1 Be7 12. g3 0-0 13. h3 b5 14. g4 Nb6 15. Na5 b4 16. Ne2 d5 17. g5 Nfd7 18. Ng3 d4 19. Bf2 Bxg5 20. Qxb4 Qc7 21. Bd3 Rb8 22. Qe1 Nc5 23. Nb3 Rfc8 24. Qe2 Nca4 25. Be1 Nc4 26. Bxc4 Bxc4 27. Qf2 d3 28. cxd3 Bxd3+ 29. Ka1 Bc2 30. Bd2 Bxd1 31. Rxd1 Qc2 32. Rb1 Rxb3 33. axb3 Bxd2 34. Nf1 Nc3 35. Re1 Qxb3 0-1

[Event "Texas Collegiate Rapid"]
[Site "Lichess.org INT"]
[Date "2023.01.29"]
[Round "3"]
[White "Dudin, Gleb"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "D10"]
[WhiteElo "2467"]
[BlackElo "2533"]
[PlyCount "63"]
[EventDate "2023.01.29"]
[EventType "swiss (rapid)"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e4 b5 4. a4 c6 5. Nc3 b4 6. Nb1 Ba6 7. Nf3 Nf6 8. e5 Nd5 9. Nbd2 c3 10. Ne4 Bxf1 11. Kxf1 cxb2 12. Bxb2 e6 13. g3 Nd7 14. Rc1 Rc8 15. Kg2 Be7 16. h4 Qb6 17. h5 Qb7 18. h6 g6 19. Rc5 0-0 20. Nh2 Nxc5 21. dxc5 Nc3 22. Bxc3 bxc3 23. Ng4 Qb2 24. Qd4 Rcd8 25. Nd6 Rb8 26. Ne3 Rb4 27. Qd3 Rxa4 28. Rb1 Qd2 29. Qf1 Ra2 30. Rb7 Bxd6 31. exd6 Qxe3 32. Qc4 0-1

[Event "Texas Collegiate Rapid"]
[Site "Lichess.org INT"]
[Date "2023.01.29"]
[Round "4"]
[White "Matviishen, Viktor"]
[Black "Escalante Ramirez, Brian Sebastian"]
[Result "1/2-1/2"]
[ECO "E94"]
[WhiteElo "2533"]
[BlackElo "2468"]
[PlyCount "145"]
[EventDate "2023.01.29"]
[EventType "swiss (rapid)"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. Be2 0-0 6. Nf3 e5 7. 0-0 Na6 8. Be3 Ng4 9. Bg5 Qe8 10. h3 h6 11. Bh4 Nf6 12. dxe5 dxe5 13. Nd5 g5 14. Nxf6+ Bxf6 15. Bg3 Qe7 16. Nh2 Nc5 17. Qc2 Ne6 18. Bg4 Nd4 19. Qd3 Rd8 20. Rad1 Bg7 21. Kh1 c6 22. Bxc8 Raxc8 23. Ng4 Rd7 24. Ne3 Rcd8 25. Qc3 Qe6 26. Rd2 b6 27. Rfd1 a5 28. b3 Bf8 29. Qb2 Bc5 30. a3 Qe7 31. Ng4 Bxa3 32. Qb1 f6 33. Nxh6+ Kh7 34. Ng4 Bb4 35. Rd3 Kg6 36. f3 Ne2 37. Rxd7 Rxd7 38. Bxe5 Rxd1+ 39. Qxd1 fxe5 40. Qxe2 Bc3 41. Ne3 Qa3 42. Qd1 Qa1 43. Qxa1 Bxa1 44. Nc2 Bb2 45. Kg1 b5 46. cxb5 cxb5 47. Kf2 a4 48. bxa4 bxa4 49. Ke3 a3 50. Nb4 Bc3 51. Na2 Bd4+ 52. Ke2 Kh5 53. g3 Bb6 54. Nb4 Ba5 55. Na2 Bc7 56. Ke3 Ba5 57. f4 Bb6+ 58. Kf3 gxf4 59. gxf4 Bd4 60. f5 Bc5 61. Ke2 Kg5 62. Kd3 Kf4 63. Nc3 Bf8 64. h4 Kg4 65. Kc4 Kxh4 66. Kd5 Kg5 67. Ke6 Kf4 68. f6 Bc5 69. f7 Bf8 70. Kf6 Bc5 71. Ke6 Bf8 72. Kf6 Bc5 73. Ke6 1/2-1/2

[Event "Texas Collegiate Rapid"]
[Site "Lichess.org INT"]
[Date "2023.01.29"]
[Round "7"]
[White "Matviishen, Viktor"]
[Black "Macovei, Andrei"]
[Result "0-1"]
[ECO "E97"]
[WhiteElo "2533"]
[BlackElo "2453"]
[PlyCount "102"]
[EventDate "2023.01.29"]
[EventType "swiss (rapid)"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. Be2 0-0 6. Nf3 e5 7. 0-0 Nc6 8. d5 Ne7 9. b4 a5 10. bxa5 Rxa5 11. a4 Ne8 12. Ba3 b6 13. Bb4 Ra8 14. Nb5 f5 15. exf5 Nxf5 16. Ra3 Bd7 17. Nc3 Nf6 18. Ng5 Nd4 19. Nge4 Nxe4 20. Nxe4 Rxa4 21. Rxa4 Bxa4 22. Qxa4 Nxe2+ 23. Kh1 Qh4 24. Qc2 Nd4 25. Qd3 Ra8 26. Bc3 Ra3 27. f3 Qe7 28. Qb1 Qd7 29. f4 exf4 30. Rxf4 Qe7 31. Rf1 h6 32. Nf6+ Bxf6 33. Qxg6+ Qg7 34. Qe8+ Kh7 35. Bxd4 Bxd4 36. Qe4+ Kh8 37. Qe8+ Qg8 38. Qe4 Be5 39. g3 Ra8 40. Qf5 Qg7 41. Kg2 Rg8 42. Rf3 Qg6 43. Qd7 Qe4 44. Qf7 Bg7 45. Kh3 Qxc4 46. Rf6 Qd4 47. Rg6 Qe4 48. Re6 Qd3 49. Rg6 b5 50. Rg4 Qc3 51. Rh4 b4 0-1

[Event "Texas Collegiate Rapid"]
[Site "Lichess.org INT"]
[Date "2023.01.29"]
[Round "5"]
[White "Matviishen, Viktor"]
[Black "Ozenir, Ekin Baris"]
[Result "0-1"]
[ECO "A25"]
[WhiteElo "2533"]
[BlackElo "2360"]
[PlyCount "102"]
[EventDate "2023.01.29"]
[EventType "swiss (rapid)"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Nge7 7. d4 exd4 8. exd4 0-0 9. 0-0 Bf5 10. Be3 Qd7 11. Nf4 Rae8 12. h3 h5 13. Kh2 Qc8 14. Nfd5 Nxd5 15. cxd5 Ne7 16. Rc1 Bd7 17. Ne4 Nf5 18. Bg5 f6 19. Bf4 Qd8 20. Qc2 g5 21. Bd2 c6 22. dxc6 Bxc6 23. d5 Bb5 24. Rfe1 h4 25. Qc7 hxg3+ 26. fxg3 Rf7 27. Qxd8 Rxd8 28. Bc3 Ne7 29. Nxf6+ Bxf6 30. Bxf6 Rxf6 31. Rxe7 Rf2 32. Rxb7 Bd3 33. Kg1 Rd2 34. Rxa7 Rxb2 35. a4 Re8 36. a5 Ra2 37. Bf1 Bxf1 38. Kxf1 Rf8+ 39. Kg1 Ra3 40. Kg2 Ra2+ 41. Kh1 Ra3 42. a6 Ra2 43. Kg1 Ra3 44. Rc2 Rxg3+ 45. Rg2 Ra3 46. Rxg5+ Kh8 47. Rg6 Rc8 48. Rh6+ Kg8 49. Rxd6 Rc1+ 50. Kf2 Rc2+ 51. Ke1 Ra1# 0-1

[Event "Texas Collegiate Rapid"]
[Site "Lichess.org INT"]
[Date "2023.01.29"]
[Round "6"]
[White "Rodriguez Garcia, Victor"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "B50"]
[WhiteElo "2341"]
[BlackElo "2533"]
[PlyCount "80"]
[EventDate "2023.01.29"]
[EventType "swiss (rapid)"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. h3 Nc6 5. Bd3 e5 6. Bc2 g5 7. d4 g4 8. hxg4 Bxg4 9. d5 Nb8 10. Na3 Nbd7 11. Nc4 h5 12. Bg5 Rg8 13. Bh4 Qc7 14. Ne3 Bh6 15. Nxg4 Rxg4 16. Qe2 c4 17. g3 0-0-0 18. Nd2 Bxd2+ 19. Kxd2 Rg6 20. Raf1 Kb8 21. Kc1 Rdg8 22. Bd1 Nc5 23. Bxf6 Nd3+ 24. Kb1 Rxf6 25. Bc2 Qb6 26. Bxd3 cxd3 27. Qd2 Rf3 28. Kc1 f5 29. exf5 e4 30. Rh2 Rgxg3 31. Re1 Rg4 32. Rxh5 Qxf2 33. Rh8+ Kc7 34. c4 Qxd2+ 35. Kxd2 Rg2+ 36. Kd1 Rxb2 37. Rxe4 Rf1+ 38. Re1 Rb1+ 39. Kd2 Rbxe1 40. Kxd3 Rxf5 0-1

[Event "Pan American Intercollegiate-chT"]
[Site "Seattle"]
[Date "2023.01.08"]
[Round "6"]
[White "Matviishen, Viktor"]
[Black "Rahul, Srivatshav P"]
[Result "1/2-1/2"]
[ECO "D52"]
[WhiteElo "2533"]
[BlackElo "2480"]
[PlyCount "134"]
[EventDate "2023.01.05"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]
[WhiteTeam "Texas Tech Univ"]
[BlackTeam "Texas Dallas Univ"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "USA"]

1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. Bg5 c6 5. e3 Nbd7 6. Nf3 Qa5 7. Nd2 Bb4 8. Qc2 dxc4 9. Bxf6 Nxf6 10. Nxc4 Qd5 11. Ne5 0-0 12. a3 Bxc3+ 13. Qxc3 Nd7 14. Rd1 Rd8 15. Nf3 b6 16. Bd3 Bb7 17. Qc2 Qh5 18. 0-0 c5 19. Be4 Bxe4 20. Qxe4 Nf6 21. Qb7 Qd5 22. Qxd5 Rxd5 23. Rc1 cxd4 24. Nxd4 Rd7 25. Rc2 h6 26. Rfc1 g5 27. Kf1 Kg7 28. Rc8 Rxc8 29. Rxc8 Nd5 30. g4 Rc7 31. Rxc7 Nxc7 32. Nc6 a5 33. Ke2 f5 34. h3 h5 35. f3 hxg4 36. hxg4 Kf6 37. Nd4 Ne8 38. Kd3 Nd6 39. Nc6 Nf7 40. Kd4 Nd6 41. e4 fxe4 42. fxe4 Nb5+ 43. Kd3 e5 44. Kc4 Nc7 45. Na7 Ke6 46. Nc8 b5+ 47. Kc5 b4 48. axb4 Na6+ 49. Kb5 Nxb4 50. Kxa5 Nd3 51. b4 Nf2 52. b5 Nxe4 53. b6 Nc5 54. Kb5 Nb7 55. Kc6 Na5+ 56. Kc7 e4 57. Nd6 Kd5 58. Nf5 Ke5 59. Ne3 Kd4 60. Nf5+ Kd3 61. Kd6 Nc4+ 62. Ke6 Nxb6 63. Kf6 Nc4 64. Kxg5 Ne5 65. Kf4 Nxg4 66. Kxg4 e3 67. Nxe3 Kxe3 1/2-1/2

[Event "Pan American Intercollegiate-chT"]
[Site "Seattle"]
[Date "2023.01.07"]
[Round "5"]
[White "Kevlishvili, Robby"]
[Black "Matviishen, Viktor"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2530"]
[BlackElo "2533"]
[PlyCount "114"]
[EventDate "2023.01.05"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]
[WhiteTeam "St Louis Univ"]
[BlackTeam "Texas Tech Univ"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "USA"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Be7 8. Bc4 0-0 9. 0-0 Nc6 10. Re1 Be6 11. Bb3 h6 12. Nh4 Na5 13. Bxe6 fxe6 14. Ng6 Rf7 15. b3 Nc6 16. f3 Rc8 17. Qd2 Qa5 18. Nxe7+ Nxe7 19. Nb1 Qxd2 20. Nxd2 Rxc2 21. Nc4 Nc8 22. a4 Rc3 23. Rac1 Rxc1 24. Rxc1 Rc7 25. Kf2 Kf8 26. Ke2 Ke7 27. b4 Nd7 28. Nb2 Rxc1 29. Bxc1 d5 30. Nd3 Nd6 31. Bb2 Nc4 32. Bc3 Kd6 33. f4 exf4 34. Bxg7 e5 35. exd5 h5 36. g3 fxg3 37. hxg3 Kxd5 38. Nf2 Kd4 39. Nd3 Nd6 40. Nf4 h4 41. gxh4 Nf5 42. Nh5 Nxh4 43. Ng3 Kc4 44. Ke3 Kxb4 45. Ke4 Kxa4 46. Kd5 Nf3 47. Kd6 b5 48. Kxd7 b4 49. Ne4 Kb3 50. Nc5+ Kc4 51. Kc6 a5 52. Kb6 e4 53. Nxe4 a4 54. Ka5 a3 55. Ka4 a2 56. Nd6+ Kd5 57. Kb3 Kxd6 1/2-1/2

[Event "Pan American Intercollegiate-chT"]
[Site "Seattle"]
[Date "2023.01.06"]
[Round "3"]
[White "Matviishen, Viktor"]
[Black "Druska, Juraj"]
[Result "1-0"]
[ECO "A21"]
[WhiteElo "2533"]
[BlackElo "2510"]
[PlyCount "95"]
[EventDate "2023.01.05"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "CBM 212 Extra"]
[Source "ChessBase"]
[SourceDate "2023.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.03.31"]
[SourceQuality "1"]
[WhiteTeam "Texas Tech Univ"]
[BlackTeam "Texas Rio Grande Valley Univ"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "USA"]

1. c4 e5 2. Nc3 f5 3. e3 Nf6 4. d4 d6 5. dxe5 dxe5 6. Qxd8+ Kxd8 7. Nf3 Nbd7 8. Ng5 Ke7 9. b3 c6 10. Bb2 h6 11. Nf3 Ke6 12. Be2 g5 13. 0-0 Bd6 14. Rfd1 Bc7 15. b4 a5 16. b5 Nc5 17. Rac1 Kf7 18. Ba3 Nfe4 19. Nxe4 Nxe4 20. Bb2 Re8 21. c5 cxb5 22. Bxb5 Re7 23. c6 b6 24. Ba3 Nc5 25. Bxc5 bxc5 26. Rxc5 g4 27. Ne1 a4 28. Nd3 Kf6 29. Nb4 Be6 30. Bc4 Rb8 31. a3 Bb6 32. Nd5+ Bxd5 33. Rcxd5 f4 34. Rd6+ Kg7 35. Rd7 Kf8 36. exf4 exf4 37. Ba6 Rbe8 38. Kf1 g3 39. hxg3 fxg3 40. Rxe7 Rxe7 41. fxg3 Re3 42. Rd7 Rc3 43. Bb5 Rb3 44. Bc4 Rxa3 45. c7 Bxc7 46. Rf7+ Ke8 47. Rxc7 Rxg3 48. Bb5+ 1-0

[Event "Denver CC Tribute to MLK"]
[Site "Denver"]
[Date "2023.01.??"]
[Round "4"]
[White "Matviishen, Viktor"]
[Black "Khanin, Semen"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "2533"]
[BlackElo "2567"]
[PlyCount "56"]
[EventDate "2023.01.14"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. cxd5 exd5 6. a3 Be7 7. Bg5 c6 8. e3 h6 9. Bf4 Nh5 10. Be5 Nxe5 11. dxe5 g6 12. h3 Ng7 13. Bd3 h5 14. Qc2 Ne6 15. Rd1 Qc7 16. 0-0 Bd7 17. b4 g5 18. Bf5 g4 19. hxg4 hxg4 20. Bxg4 0-0-0 21. Rc1 Kb8 22. Bxe6 Bxe6 23. Ne2 Bg4 24. Ng3 Rdg8 25. Nd4 Qxe5 26. Qxc6 Bd6 27. Qb5 Ka8 28. Nb3 Qe7 0-1

[Event "Denver CC Tribute to MLK"]
[Site "Denver"]
[Date "2023.01.??"]
[Round "2"]
[White "Matviishen, Viktor"]
[Black "Langseth, Rhett"]
[Result "1-0"]
[ECO "A55"]
[WhiteElo "2533"]
[BlackElo "1852"]
[PlyCount "65"]
[EventDate "2023.01.14"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 d6 3. d4 Nbd7 4. Nf3 e5 5. e4 exd4 6. Nxd4 Nc5 7. f3 a5 8. Be3 Be7 9. Be2 0-0 10. 0-0 Re8 11. Qd2 c6 12. Rad1 Qc7 13. g4 Bf8 14. g5 Nfd7 15. Nf5 Re6 16. h4 g6 17. Nh6+ Bxh6 18. gxh6 b6 19. Bf4 Qd8 20. Qe1 Qf8 21. Qg3 Nf6 22. Bxd6 Nh5 23. Bxf8 Nxg3 24. Bxc5 Ba6 25. Bxb6 Nxf1 26. Kxf1 Re5 27. f4 Ree8 28. e5 Bc8 29. Ne4 Bh3+ 30. Kf2 Reb8 31. c5 Be6 32. a3 Rb7 33. Rd6 1-0

[Event "Denver CC Tribute to MLK"]
[Site "Denver"]
[Date "2023.01.??"]
[Round "1"]
[White "Motley, Christopher"]
[Black "Matviishen, Viktor"]
[Result "0-1"]
[ECO "A33"]
[BlackElo "2533"]
[PlyCount "26"]
[EventDate "2023.01.14"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "USA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. c4 c5 2. Nf3 Nf6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 e6 6. Bf4 d5 7. Ndb5 e5 8. Bg5 d4 9. Nd5 Nxd5 10. cxd5 Qxg5 11. a3 Qd8 12. e4 a6 13. Qa4 Bd7 0-1

