[Event "Chigorin Memorial 28th"]
[Site "St Petersburg"]
[Date "2021.10.31"]
[Round "9"]
[White "Kotlyar, Anfisa"]
[Black "Deruchenko, Ivan"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1232"]
[BlackElo "1497"]
[PlyCount "90"]
[EventDate "2021.10.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "RUS"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. f4 d5 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. d3 Nc6 6. Nc3 e6 7. Nf3 Nge7 8. 0-0 g6 9. e5 Bg7 10. d4 cxd4 11. Nxd4 0-0 12. Nce2 f6 13. exf6 Bxf6 14. c3 Rac8 15. Be3 e5 16. fxe5 Bxe5 17. Qd2 Qg4 18. Nxc6 bxc6 19. Bxa7 Nf5 20. Nd4 Nh4 21. Bc5 Bxd4+ 22. Bxd4 Nf3+ 23. Rxf3 Rxf3 24. a4 Rf7 25. a5 Re8 26. Re1 Rfe7 27. Rxe7 Rxe7 28. h3 Re2 29. hxg4 Rxd2 30. b4 Ra2 31. Kh2 Kf7 32. Kg3 Ke6 33. Kf3 Ra3 34. Kf4 h6 35. g3 Ra2 36. Ke3 Rg2 37. Kf3 Ra2 38. Ke3 Rb2 39. a6 Ra2 40. a7 Kd7 41. Kf4 Ke6 42. Ke3 Ra3 43. Kd3 Ra2 44. Ke3 Ra3 45. Kd3 Ra2 1/2-1/2

[Event "Chigorin Memorial 28th"]
[Site "St Petersburg"]
[Date "2021.10.30"]
[Round "8"]
[White "Deruchenko, Ivan"]
[Black "Filimonov, Mikhail A"]
[Result "0-1"]
[ECO "A44"]
[WhiteElo "1497"]
[BlackElo "1863"]
[PlyCount "112"]
[EventDate "2021.10.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "RUS"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 c5 2. d5 d6 3. c4 e5 4. Nc3 Be7 5. e4 Bg5 6. Nf3 Bxc1 7. Qxc1 Ne7 8. Bd3 0-0 9. 0-0 g6 10. Ne1 Nd7 11. g3 f5 12. exf5 gxf5 13. Ng2 Ng6 14. h4 Qf6 15. Qg5 Qxg5 16. hxg5 e4 17. Be2 Nde5 18. Nh4 Bd7 19. b3 Rae8 20. Rae1 Nf7 21. f4 exf3 22. Bxf3 Nxg5 23. Bh5 Rxe1 24. Rxe1 Ne5 25. Rf1 f4 26. gxf4 Nh3+ 27. Kh2 Nxf4 28. Bd1 Nfg6 29. Rg1 Kf7 30. Bh5 Kg7 31. Kg3 Kh6 32. Nxg6 hxg6 33. Be2 Nf7 34. Ne4 Bf5 35. Bf3 Kg7 36. Rh1 Re8 37. Kf4 Bxe4 38. Bxe4 g5+ 39. Kf3 Ne5+ 40. Ke3 Ng4+ 41. Kf3 Rxe4 42. Kxe4 Nf2+ 43. Kf3 Nxh1 44. Kg2 Kf6 45. Kxh1 Kf5 46. Kg1 Kf4 47. Kf2 b6 48. a3 a6 49. Kg2 Kg4 50. b4 Kf4 51. bxc5 bxc5 52. Kh3 Kf3 53. Kh2 g4 54. Kg1 Kg3 55. a4 a5 56. Kh1 Kf2 0-1

[Event "Chigorin Memorial 28th"]
[Site "St Petersburg"]
[Date "2021.10.29"]
[Round "7"]
[White "Lauda, Alexandr"]
[Black "Deruchenko, Ivan"]
[Result "1/2-1/2"]
[ECO "D23"]
[WhiteElo "1895"]
[BlackElo "1497"]
[PlyCount "88"]
[EventDate "2021.10.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "RUS"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. g3 c5 5. Bg2 Nc6 6. 0-0 cxd4 7. Qa4 e5 8. Nxe5 Bd7 9. Nxd7 Qxd7 10. Qxc4 Be7 11. Rd1 0-0 12. Bxc6 Qxc6 13. Qxc6 bxc6 14. Rxd4 Rfd8 15. Rxd8+ Rxd8 16. Nc3 Bb4 17. Be3 Bxc3 18. bxc3 Nd5 19. Rd1 Re8 20. c4 Nxe3 21. fxe3 g6 22. Kf2 Re5 23. Rd3 Ra5 24. a3 Kf8 25. e4 Ra4 26. Rc3 Ke7 27. Ke3 Kd6 28. Kd4 c5+ 29. Kd3 Ke5 30. Ke3 g5 31. h4 h6 32. Rd3 Rxc4 33. Rd5+ Kf6 34. Kd3 Ra4 35. hxg5+ hxg5 36. e5+ Ke6 37. Rxc5 Rxa3+ 38. Ke4 Ra4+ 39. Kf3 g4+ 40. Ke3 Kf5 41. Rc7 Ke6 42. Rb7 f5 43. exf6 Kxf6 44. Rb5 Kg6 1/2-1/2

[Event "Chigorin Memorial 28th"]
[Site "St Petersburg"]
[Date "2021.10.28"]
[Round "6"]
[White "Dudarev, Vyacheslav"]
[Black "Deruchenko, Ivan"]
[Result "1-0"]
[ECO "D20"]
[WhiteElo "1817"]
[BlackElo "1497"]
[PlyCount "81"]
[EventDate "2021.10.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "RUS"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e4 Nf6 4. e5 Nd5 5. Bxc4 e6 6. Nf3 Be7 7. 0-0 0-0 8. Nc3 Nb6 9. Bd3 h6 10. Qe2 Nd5 11. Bxh6 gxh6 12. Qe4 f5 13. exf6 Nxf6 14. Qg6+ Kh8 15. Qxh6+ Kg8 16. Qg5+ Kh8 17. Ne5 Qxd4 18. Rae1 Nc6 19. Re3 Qxe3 20. Ng6+ Kg7 21. fxe3 Ne4 22. Qh5 Rxf1+ 23. Kxf1 Nxc3 24. bxc3 Bd7 25. Nxe7 Nxe7 26. Qe5+ Kf7 27. Qxc7 Bc6 28. Qf4+ Ke8 29. Be4 Kd7 30. Bxc6+ bxc6 31. Ke2 Rg8 32. g3 Nd5 33. Qd4 c5 34. Qxc5 Rc8 35. Qxa7+ Rc7 36. Qd4 Rxc3 37. e4 Rc2+ 38. Kf3 Rc3+ 39. Ke2 Rc2+ 40. Ke1 Rc1+ 41. Kd2 1-0

[Event "Chigorin Memorial 28th"]
[Site "St Petersburg"]
[Date "2021.10.27"]
[Round "5"]
[White "Deruchenko, Ivan"]
[Black "Piatrenka, Ivan"]
[Result "1/2-1/2"]
[ECO "E83"]
[WhiteElo "1497"]
[BlackElo "1837"]
[PlyCount "151"]
[EventDate "2021.10.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "RUS"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 Nc6 7. Qd2 e5 8. d5 Nd4 9. Nge2 c5 10. dxc6 bxc6 11. Nxd4 exd4 12. Bxd4 Re8 13. Be2 Qa5 14. Rd1 Be6 15. 0-0 Rab8 16. f4 c5 17. Bxf6 Bxf6 18. f5 Bc8 19. fxg6 Bd4+ 20. Kh1 hxg6 21. Qf4 Be6 22. Nd5 Bxd5 23. cxd5 Qc7 24. b3 Re5 25. Rf3 Rbe8 26. Bd3 Rh5 27. Rh3 Ree5 28. Rxh5 Rxh5 29. h3 Be5 30. Qg4 Qe7 31. Rf1 Kg7 32. Qc8 Rh4 33. Be2 Rf4 34. Rxf4 Bxf4 35. Qg4 Qxe4 36. Qf3 Qd4 37. g3 Be5 38. a4 Qa1+ 39. Kg2 Qb2 40. Kh1 Bc3 41. Bc4 Qd2 42. Qe2 Qc1+ 43. Kg2 Be5 44. Qf1 Qe3 45. Qf3 Qd2+ 46. Qe2 Qg5 47. Qf3 f5 48. h4 Qd2+ 49. Qe2 Qd4 50. Qd3 Qb2+ 51. Qe2 Qc3 52. Qf3 Qe1 53. Qf2 Qc1 54. Qf1 Qh6 55. Qf2 Qh5 56. Be2 Qh8 57. Bc4 Qf8 58. Qf3 Qf6 59. Bd3 Bd4 60. Kh3 Qe5 61. Qe2 Be3 62. Bc4 Kf6 63. Qf3 Qd4 64. g4 Ke5 65. gxf5 gxf5 66. Qg3+ Ke4 67. Qg2+ Ke5 68. Qg3+ Ke4 69. Qg2+ Ke5 70. Qg7+ Ke4 71. Qg2+ Kf4 72. Qg3+ Ke4 73. Qg2+ Ke5 74. Qg7+ Ke4 75. Qg2+ Kf4 76. Qg3+ 1/2-1/2

[Event "Chigorin Memorial 28th"]
[Site "St Petersburg"]
[Date "2021.10.26"]
[Round "4"]
[White "Deruchenko, Ivan"]
[Black "Yakovlev, Yuri S"]
[Result "1/2-1/2"]
[ECO "A44"]
[WhiteElo "1497"]
[BlackElo "1847"]
[PlyCount "145"]
[EventDate "2021.10.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "RUS"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 c5 2. d5 e5 3. c4 d6 4. Nc3 f5 5. e4 Be7 6. exf5 Bxf5 7. Bd3 Bxd3 8. Qxd3 Nf6 9. Bd2 0-0 10. f3 Nbd7 11. 0-0-0 a6 12. g4 e4 13. Nxe4 Ne5 14. Qe2 Nxe4 15. Qxe4 b5 16. b3 bxc4 17. bxc4 Kh8 18. Re1 Bg5 19. Re2 Bxd2+ 20. Rxd2 Qa5 21. f4 Qa3+ 22. Kd1 Nxg4 23. Qf3 Qa4+ 24. Rc2 Nf6 25. Ne2 Rae8 26. Qb3 Qd7 27. Rf1 Rb8 28. Qd3 Rfe8 29. Ng3 Ng4 30. Re2 Rxe2 31. Nxe2 Qa4+ 32. Ke1 Qxa2 33. Nc3 Qa1+ 34. Nd1 Qa5+ 35. Qc3 Re8+ 36. Kd2 Qd8 37. h3 Nf6 38. Nf2 Qe7 39. Qd3 a5 40. Ng4 a4 41. Nxf6 Qxf6 42. Kc2 Rb8 43. Rb1 Rf8 44. Rf1 g6 45. Qe4 Qf5 46. Qxf5 Rxf5 47. Kd3 g5 48. Ra1 Rxf4 49. Rxa4 Kg7 50. Ra6 Rf6 51. Ke3 Kg6 52. Ra8 Kf5 53. Rg8 h6 54. Kf3 Ke5+ 55. Ke3 Kf5 56. Kf3 h5 57. Rg7 Rf8 58. Rd7 Ke5+ 59. Ke3 g4 60. hxg4 hxg4 61. Re7+ Kf5 62. Re6 Rf6 63. Rxf6+ Kxf6 64. Kf4 g3 65. Kxg3 Ke5 66. Kg4 Kd4 67. Kf5 Kxc4 68. Ke6 Kb4 69. Kxd6 c4 70. Ke7 c3 71. d6 c2 72. d7 c1Q 73. d8Q 1/2-1/2

[Event "Chigorin Memorial 28th"]
[Site "St Petersburg"]
[Date "2021.10.25"]
[Round "3"]
[White "Nagaeva, Aliia"]
[Black "Deruchenko, Ivan"]
[Result "1/2-1/2"]
[ECO "B45"]
[WhiteElo "1870"]
[BlackElo "1497"]
[PlyCount "88"]
[EventDate "2021.10.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "RUS"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 d4 11. Qe2+ Be6 12. Ne4 Nxe4 13. Qxe4 Qd5 14. 0-0 Qxe4 15. Bxe4 0-0-0 16. Bf4 Rhe8 17. Rfe1 h6 18. h4 Ne7 19. Rad1 Bf5 20. Bd3 Bxd3 21. cxd3 Nc6 22. b4 a6 23. Kf1 Kd7 24. Rc1 Re6 25. Rc5 b6 26. Rc4 Rxe1+ 27. Kxe1 Rc8 28. Kd2 Ke6 29. Bg3 Kd5 30. f3 Na7 31. Rxc8 Nxc8 32. Bc7 b5 33. Kc2 Ne7 34. Kd2 Nf5 35. g3 Kc6 36. Bb8 Kb7 37. Bf4 Kc6 38. Ke2 Kd5 39. h5 Ke6 40. g4 Ne7 41. Bc1 Nd5 42. f4 Nc3+ 43. Kf3 f6 44. Bb2 Kd5 1/2-1/2

[Event "Chigorin Memorial 28th"]
[Site "St Petersburg"]
[Date "2021.10.24"]
[Round "2"]
[White "Deruchenko, Ivan"]
[Black "Valiyev, Shahin"]
[Result "0-1"]
[ECO "D37"]
[WhiteElo "1497"]
[BlackElo "1944"]
[PlyCount "100"]
[EventDate "2021.10.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "RUS"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bf4 c6 6. e3 Nbd7 7. Be2 0-0 8. 0-0 dxc4 9. Bxc4 b5 10. Bd3 Bb7 11. Rc1 a6 12. Ne4 Qb6 13. Bd6 Bxd6 14. Nxd6 c5 15. Nxb7 cxd4 16. Nxd4 Qxb7 17. Qe2 Ne5 18. Rfd1 Rac8 19. Nf3 Nxf3+ 20. Qxf3 Qxf3 21. gxf3 Rxc1 22. Rxc1 Rd8 23. Be4 g5 24. Bb7 Rd6 25. b3 Rb6 26. Be4 Kg7 27. Rc8 h6 28. b4 Nxe4 29. fxe4 Rd6 30. Ra8 Kf6 31. Kg2 Ke5 32. Kf3 h5 33. h3 f6 34. Ra7 Rc6 35. a3 g4+ 36. hxg4 hxg4+ 37. Kxg4 Kxe4 38. Re7 f5+ 39. Kg5 e5 40. f3+ Kxf3 41. Kxf5 e4 42. Rh7 Kxe3 43. Rh3+ Kd4 44. Rh4 Kc3 45. Rxe4 Kb2 46. Re3 Rc3 47. Re4 Kxa3 48. Re6 Kxb4 49. Rxa6 Re3 50. Kf4 Re8 0-1

[Event "Chigorin Memorial 28th"]
[Site "St Petersburg"]
[Date "2021.10.23"]
[Round "1"]
[White "Lisin, Egor"]
[Black "Deruchenko, Ivan"]
[Result "1-0"]
[ECO "A08"]
[WhiteElo "2100"]
[BlackElo "1497"]
[PlyCount "115"]
[EventDate "2021.10.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "RUS"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. 0-0 0-0 5. d3 d5 6. Nbd2 c5 7. e4 Nc6 8. Re1 dxe4 9. dxe4 Ng4 10. h3 Nge5 11. Nxe5 Nxe5 12. f4 Nc6 13. e5 f6 14. exf6 exf6 15. Ne4 f5 16. Ng5 Bd4+ 17. Kh2 h6 18. Nf3 Bf6 19. Qxd8 Rxd8 20. c3 Rb8 21. h4 b5 22. Ne5 Nxe5 23. fxe5 Be7 24. Bxh6 Bb7 25. Rad1 Bxg2 26. Kxg2 b4 27. c4 b3 28. axb3 Rxb3 29. Rxd8+ Bxd8 30. Rd1 Rxb2+ 31. Kf3 Rb8 32. Rd7 a5 33. e6 Bf6 34. h5 gxh5 35. Kf4 a4 36. Kxf5 Bb2 37. Ra7 a3 38. Kg6 Re8 39. e7 Rb8 40. Bg5 Rc8 41. Ra6 Bg7 42. Rxa3 Rc6+ 43. Kxh5 Kf7 44. Rf3+ Ke8 45. Rd3 Kf7 46. Rd8 Re6 47. Kg4 Re4+ 48. Kf5 Re5+ 49. Kf4 Re6 50. e8Q+ Rxe8 51. Rxe8 Kxe8 52. Ke4 Kd7 53. Kd5 Bd4 54. g4 Ke8 55. Bf4 Kf7 56. Bd6 Kg8 57. Bxc5 Bc3 58. Be3 1-0

