[Event "Cambridge op 2nd"]
[Site "Cambridge"]
[Date "2024.02.23"]
[Round "8"]
[White "Crocker, Philip J"]
[Black "Jefremov, Aivar"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "2137"]
[BlackElo "1645"]
[PlyCount "75"]
[EventDate "2024.02.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "CB09_2024"]
[SourceDate "2024.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2024.02.28"]
[SourceQuality "1"]

1. c4 e6 2. g3 Nf6 3. Bg2 d5 4. Nf3 dxc4 5. Qa4+ Nbd7 6. Qxc4 c5 7. d3 Nb6 8. Qb3 Qc7 9. Nc3 Bd7 10. 0-0 Bd6 11. Nb5 Bxb5 12. Qxb5+ Qd7 13. Qa5 0-0 14. b3 Qc7 15. Ba3 Nbd7 16. Qxc7 Bxc7 17. Rac1 b6 18. d4 Bd6 19. Ne5 Rac8 20. Nc6 Rc7 21. dxc5 Bxc5 22. b4 Nd5 23. Bxd5 exd5 24. Ne7+ Bxe7 25. Rxc7 Rd8 26. Rxa7 Bf6 27. Rc1 Ne5 28. Bb2 Nf3+ 29. exf3 Bxb2 30. Rd7 Re8 31. Rb1 Bf6 32. Rxd5 Re2 33. Rbd1 h6 34. R5d2 Re7 35. Rc2 Ra7 36. Rd6 b5 37. Rb6 Ra3 38. Kg2 1-0

[Event "Cambridge op 2nd"]
[Site "Cambridge"]
[Date "2024.02.23"]
[Round "7"]
[White "Jefremov, Aivar"]
[Black "Mocic, Ivano"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "1645"]
[BlackElo "2008"]
[PlyCount "80"]
[EventDate "2024.02.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "CB09_2024"]
[SourceDate "2024.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2024.02.28"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bf4 d5 4. e3 c5 5. c3 Qb6 6. Qb3 c4 7. Qc2 Bd6 8. Bg3 Nbd7 9. Nbd2 0-0 10. Be2 Qc7 11. e4 dxe4 12. Bxd6 Qxd6 13. Nxe4 Nxe4 14. Qxe4 Nf6 15. Qe5 Qb6 16. Rb1 Qc6 17. 0-0 b5 18. Nd2 Bb7 19. Bf3 Qd7 20. Bxb7 Qxb7 21. f3 Qd5 22. Rfe1 Rfe8 23. Ne4 Qxe5 24. dxe5 Nxe4 25. Rxe4 Red8 26. Rd4 Rxd4 27. cxd4 Kf8 28. Kf2 Ke7 29. b3 c3 30. b4 a5 31. bxa5 Rxa5 32. a3 c2 33. Rc1 Rxa3 34. Rxc2 b4 35. Rb2 b3 36. Ke3 Ra2 37. Rxb3 g5 38. g4 Rxh2 39. Rb7+ Ke8 40. Rb8+ Ke7 1/2-1/2

[Event "Cambridge op 2nd"]
[Site "Cambridge"]
[Date "2024.02.22"]
[Round "6"]
[White "Bharat Kumar, Balahari"]
[Black "Jefremov, Aivar"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "2060"]
[BlackElo "1645"]
[PlyCount "160"]
[EventDate "2024.02.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "CB09_2024"]
[SourceDate "2024.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2024.02.28"]
[SourceQuality "1"]

1. d4 e6 2. c4 Nf6 3. Nf3 Bb4+ 4. Bd2 Bxd2+ 5. Nbxd2 0-0 6. e4 d5 7. Bd3 dxe4 8. Nxe4 Nxe4 9. Bxe4 Nd7 10. 0-0 Nf6 11. Bc2 b6 12. Qd3 Bb7 13. Rad1 Be4 14. Qe2 Bxc2 15. Qxc2 Qd6 16. Rfe1 c6 17. Qa4 Rfb8 18. Ne5 b5 19. Qa6 bxc4 20. Nxc4 Qb4 21. b3 Qb5 22. Qa3 a5 23. Nb2 Nd5 24. Na4 Nb4 25. Rd2 Qf5 26. Red1 Rd8 27. Qc1 Rd6 28. Qc5 Rd5 29. Qc4 Rd6 30. Qc5 Rd5 31. Qc4 Rd6 32. Nc5 e5 33. a3 Nd5 34. dxe5 Qxe5 35. g3 h6 36. Nd3 Qg5 37. Nf4 Rad8 38. h4 Qe5 39. Nxd5 Rxd5 40. Rxd5 cxd5 41. Qc5 Qe2 42. Rd4 Qe5 43. b4 axb4 44. axb4 Ra8 45. Rxd5 Ra1+ 46. Kh2 Qe4 47. Qc8+ Kh7 48. Qf5+ Qxf5 49. Rxf5 Kg6 50. Rf4 Rb1 51. Kg2 f6 52. Kf3 Kf7 53. h5 Ke6 54. g4 f5 55. gxf5+ Ke5 56. Rg4 Kxf5 57. Rxg7 Rxb4 58. Rg6 Rb3+ 59. Kg2 Rb5 60. Rxh6 Kg4 61. Rh8 Rb6 62. h6 Kg5 63. Kg3 Rb3+ 64. f3 Ra3 65. h7 Kg6 66. Rg8+ Kxh7 67. Rg4 Rb3 68. Kf4 Rb4+ 69. Kf5 Rb5+ 70. Kf6 Rb6+ 71. Kg5 Kg7 72. Kf5+ Kf7 73. Ra4 Rb5+ 74. Kg4 Kf6 75. Ra6+ Kf7 76. f4 Rc5 77. f5 Rc1 78. Ra4 Rg1+ 79. Kf4 Rf1+ 80. Kg5 Rg1+ 1/2-1/2

[Event "Cambridge op 2nd"]
[Site "Cambridge"]
[Date "2024.02.21"]
[Round "5"]
[White "Jefremov, Aivar"]
[Black "Underwood, Jon"]
[Result "1/2-1/2"]
[ECO "A80"]
[WhiteElo "1645"]
[BlackElo "1993"]
[PlyCount "58"]
[EventDate "2024.02.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "CB09_2024"]
[SourceDate "2024.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2024.02.28"]
[SourceQuality "1"]

1. d4 f5 2. Nc3 Nf6 3. Bg5 d5 4. Bxf6 exf6 5. e3 Be6 6. Bd3 Nc6 7. Qf3 Qd7 8. h3 Nb4 9. Nge2 c6 10. Nf4 Nxd3+ 11. Nxd3 Bd6 12. Ne2 0-0-0 13. Nef4 Bf7 14. g4 fxg4 15. Qxg4 Qxg4 16. hxg4 Rde8 17. Kd2 h6 18. Nh5 Rhg8 19. b4 b6 20. Nhf4 Kb7 21. a4 Ra8 22. a5 Kc7 23. Ra3 Rgc8 24. Rha1 Kb7 25. c3 Re8 26. Nh5 Bf8 27. Ng3 g6 28. Rh1 Rac8 29. Rha1 Ra8 1/2-1/2

[Event "Cambridge op 2nd"]
[Site "Cambridge"]
[Date "2024.02.21"]
[Round "4"]
[White "Volovich, Julia"]
[Black "Jefremov, Aivar"]
[Result "1/2-1/2"]
[ECO "E32"]
[WhiteElo "1983"]
[BlackElo "1645"]
[PlyCount "63"]
[EventDate "2024.02.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "CB09_2024"]
[SourceDate "2024.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2024.02.28"]
[SourceQuality "1"]

1. d4 e6 2. c4 Nf6 3. Nc3 Bb4 4. Qc2 0-0 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Bb7 8. f3 h6 9. Bh4 c5 10. dxc5 bxc5 11. Rd1 Ne4 12. Qxg7+ Kxg7 13. Bxd8 Rxd8 14. fxe4 Bxe4 15. Nf3 Nc6 16. e3 Rab8 17. Bd3 Bxd3 18. Rxd3 Rxb2 19. 0-0 Rc2 20. Rfd1 Rxc4 21. Rxd7 Rxd7 22. Rxd7 Kf6 23. Rc7 Na5 24. Rxa7 Ra4 25. Nd2 Rxa3 26. Ne4+ Kg6 27. Nxc5 Nc4 28. Rxa3 Nxa3 29. Kf2 Nc4 30. Kf3 Nd6 31. Kf4 Nc4 32. Ke4 1/2-1/2

[Event "Cambridge op 2nd"]
[Site "Cambridge"]
[Date "2024.02.20"]
[Round "3"]
[White "Jefremov, Aivar"]
[Black "Cole, James"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "1645"]
[BlackElo "1940"]
[PlyCount "72"]
[EventDate "2024.02.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ENG"]
[SourceTitle "CB09_2024"]
[SourceDate "2024.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2024.02.28"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6 5. Be2 Nh5 6. Bg5 h6 7. Bh4 g5 8. Bg3 Nxg3 9. hxg3 c5 10. c3 Bf5 11. Nbd2 0-0 12. g4 Bg6 13. Qb3 Qb6 14. Qxb6 axb6 15. Bb5 Nc6 16. Nf1 Ra5 17. Be2 b5 18. Ng3 e6 19. Nd2 Rfa8 20. a3 b4 21. Nc4 bxa3 22. Rxa3 Rxa3 23. Nxa3 cxd4 24. exd4 d5 25. Kd2 Bf8 26. Nc2 Na5 27. Bd3 Nb3+ 28. Ke3 Ra2 29. Bxg6 fxg6 30. Rb1 Bd6 31. Ne2 Na5 32. Kd3 Nb3 33. f3 Kf7 34. Ne3 Na5 35. Nc2 Nc4 36. b3 Na3 1/2-1/2

[Event "London Central Major"]
[Site "London"]
[Date "2022.11.06"]
[Round "5"]
[White "Cooper, Malcolm H"]
[Black "Jefremov, Aivar"]
[Result "1/2-1/2"]
[ECO "E47"]
[WhiteElo "1783"]
[BlackElo "1636"]
[PlyCount "103"]
[EventDate "2022.11.04"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "ENG"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 e6 2. c4 Nf6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 b6 6. Nge2 Bb7 7. 0-0 c5 8. a3 Ba5 9. Rb1 Bxc3 10. Nxc3 d5 11. Re1 Nc6 12. cxd5 exd5 13. dxc5 bxc5 14. b3 Ne5 15. Bf1 Nfg4 16. f3 Qh4 17. fxg4 Nxg4 18. h3 Qf2+ 19. Kh1 f5 20. hxg4 Qh4+ 21. Kg1 fxg4 22. Ne2 Qf2+ 23. Kh2 Rf3 24. Ng1 Qg3+ 25. Kh1 Rf5 26. e4 Rh5+ 27. Nh3 Rf8 28. Re3 Qf2 29. Qxg4 Qxf1+ 30. Kh2 d4 31. Rg3 Qf7 32. Rf3 Qe8 33. Rxf8+ Kxf8 34. Bd2 Qe5+ 35. Bf4 Qxe4 36. Bd6+ Kg8 37. Qxe4 Bxe4 38. Re1 Bc2 39. Re8+ Kf7 40. Rc8 d3 41. Rxc5 Rxh3+ 42. gxh3 d2 43. Rd5 d1Q 44. Rxd1 Bxd1 45. b4 Ba4 46. Kg3 g5 47. h4 Kg6 48. hxg5 Kxg5 49. Bb8 a6 50. Bc7 Bc6 51. Bd6 h5 52. Be7+ 1/2-1/2

[Event "London Central Major"]
[Site "London"]
[Date "2022.11.06"]
[Round "4"]
[White "Jefremov, Aivar"]
[Black "Jezierski, Colum"]
[Result "0-1"]
[ECO "D32"]
[WhiteElo "1636"]
[BlackElo "1908"]
[PlyCount "44"]
[EventDate "2022.11.04"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "ENG"]
[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 c5 4. Nf3 d5 5. cxd5 exd5 6. Bg5 Be7 7. dxc5 Nc6 8. e3 Be6 9. Nd4 Bxc5 10. Nxe6 fxe6 11. Bd3 0-0 12. Qc2 Nb4 13. Qb1 Nxd3+ 14. Qxd3 Bd6 15. 0-0 Bxh2+ 16. Kh1 Bd6 17. Rad1 Qe8 18. e4 Ng4 19. f4 Qh5+ 20. Qh3 Qxh3+ 21. gxh3 Ne3 22. e5 Bxe5 0-1

[Event "London Central Major"]
[Site "London"]
[Date "2022.11.05"]
[Round "3"]
[White "Hall, Antony C"]
[Black "Jefremov, Aivar"]
[Result "1/2-1/2"]
[ECO "C10"]
[WhiteElo "1794"]
[BlackElo "1636"]
[PlyCount "23"]
[EventDate "2022.11.04"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "ENG"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. c3 Ngf6 6. Bd3 Nxe4 7. Bxe4 Nf6 8. Bc2 c5 9. Nf3 cxd4 10. Qxd4 Qxd4 11. Nxd4 Bd7 12. 0-0 1/2-1/2

[Event "London Central Major"]
[Site "London"]
[Date "2022.11.05"]
[Round "2"]
[White "Jefremov, Aivar"]
[Black "McKerracher, Douglas"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "1636"]
[BlackElo "1784"]
[PlyCount "91"]
[EventDate "2022.11.04"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "ENG"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 f5 2. Nc3 Nf6 3. Bg5 d5 4. Bxf6 exf6 5. e3 Be6 6. Bd3 Qd7 7. Qf3 c6 8. h3 Na6 9. a3 Nc7 10. Nge2 g6 11. Nf4 Bf7 12. g4 fxg4 13. hxg4 Bg7 14. 0-0-0 0-0-0 15. Na4 Ne6 16. Be2 Nxf4 17. Qxf4 Qd6 18. Qf3 g5 19. Rxh7 Rxh7 20. Qf5+ Be6 21. Qxh7 Qe7 22. Nc5 Rh8 23. Qd3 Rh4 24. Nxe6 Qxe6 25. Qg6 Qe7 26. Bd3 Kc7 27. Qf5 Qd7 28. Qxd7+ Kxd7 29. Kd2 Bf8 30. Rc1 Bd6 31. Rf1 Rh2 32. Kc3 Rh3 33. b4 Ke7 34. a4 b6 35. Kb3 c5 36. bxc5 bxc5 37. Kc3 cxd4+ 38. Kxd4 Be5+ 39. Kxd5 Rh8 40. Rb1 Rd8+ 41. Ke4 Rd7 42. a5 Bc7 43. a6 Bb6 44. Rh1 Kf8 45. Kf5 Kg7 46. Ke6 1-0

[Event "London Central Major"]
[Site "London"]
[Date "2022.11.04"]
[Round "1"]
[White "Jefremov, Aivar"]
[Black "Moss, Louis"]
[Result "1-0"]
[ECO "E04"]
[WhiteElo "1636"]
[PlyCount "109"]
[EventDate "2022.11.04"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "ENG"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. g3 Nf6 4. Bg2 e6 5. Nf3 Nbd7 6. 0-0 dxc4 7. Qc2 Bd6 8. e4 e5 9. Bg5 h6 10. Be3 0-0 11. Nbd2 Ng4 12. Nxc4 Nxe3 13. Nxe3 exd4 14. Nxd4 Qb6 15. Rad1 Ne5 16. Nxc6 Qxc6 17. Qxc6 Nxc6 18. Rxd6 Be6 19. a3 Rfd8 20. Rfd1 Rxd6 21. Rxd6 Rc8 22. Nd5 Kf8 23. f4 Bxd5 24. Rxd5 Ke7 25. Bh3 Rc7 26. e5 Nd8 27. Rd2 Ne6 28. f5 Ng5 29. Bg2 b6 30. h4 Nh7 31. Kf2 Rc5 32. Re2 f6 33. exf6+ Kxf6 34. g4 Kf7 35. Kg3 Nf6 36. g5 hxg5 37. hxg5 Nd7 38. Kf4 Rc4+ 39. Be4 Ke7 40. b3 Rc5 41. Bc6+ Kd6 42. Bxd7 Kxd7 43. f6 gxf6 44. gxf6 Rc6 45. Kg5 Rc1 46. Re7+ Kd8 47. Re5 Rf1 48. Kg6 Rg1+ 49. Kh7 Rf1 50. Kg7 Rg1+ 51. Kf8 Rf1 52. f7 Rg1 53. Rd5+ Kc7 54. Ke7 Re1+ 55. Kf6 1-0

[Event "Riga op"]
[Site "Riga"]
[Date "2020.08.25"]
[Round "3"]
[White "Jefremov, Aivar"]
[Black "Tokranovs, Dmitrijs"]
[Result "0-1"]
[ECO "A31"]
[WhiteElo "1062"]
[BlackElo "2212"]
[PlyCount "62"]
[EventDate "2020.08.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "LAT"]
[SourceTitle "CBM 198 Extra"]
[Source "ChessBase"]
[SourceDate "2020.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. Nf3 g6 4. Nc3 Bg7 5. Bf4 cxd4 6. Nxd4 d6 7. Nb3 0-0 8. h3 Be6 9. e4 Na6 10. Bd3 Rc8 11. Qe2 Nb4 12. Nd5 Nxd3+ 13. Qxd3 Nd7 14. Bg5 Bxd5 15. exd5 Ne5 16. Qe2 h6 17. f4 hxg5 18. fxe5 Bxe5 19. 0-0 Kg7 20. Rab1 Rh8 21. Rf3 Rh4 22. Rbf1 f6 23. Nd2 g4 24. Rb3 Qd7 25. Qf2 Rch8 26. Qxa7 gxh3 27. Nf3 hxg2 28. Kxg2 Rh2+ 29. Nxh2 Rxh2+ 30. Kf3 Qh3+ 31. Ke4 f5+ 0-1

