[Event "Guwahati Sakatam op 1st"]
[Site "Guwahati"]
[Date "2024.03.24"]
[Round "3"]
[White "Singh, Y Dhanabir"]
[Black "Koshin, Das"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "1996"]
[BlackElo "1672"]
[PlyCount "111"]
[EventDate "2024.03.23"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "IND"]
[SourceTitle "CB15_2024"]
[SourceDate "2024.04.10"]
[SourceVersion "1"]
[SourceVersionDate "2024.04.10"]
[SourceQuality "1"]

1. e4 c5 2. f4 Nc6 3. Nf3 d6 4. Bb5 Bd7 5. 0-0 Nf6 6. d3 e6 7. Bxc6 Bxc6 8. c4 Be7 9. Nc3 0-0 10. b3 d5 11. cxd5 exd5 12. e5 Ng4 13. f5 Qc7 14. Qe2 d4 15. Nxd4 Qxe5 16. Qxe5 Nxe5 17. Nxc6 Nxc6 18. Ne4 Ne5 19. f6 Bxf6 20. Nxf6+ gxf6 21. Rxf6 Rfe8 22. Bb2 Nxd3 23. Bc3 Rad8 24. Raf1 Rd7 25. R6f5 Re6 26. Bf6 Kf8 27. h4 b5 28. h5 h6 29. Bc3 b4 30. Bf6 Re2 31. Ba1 Ne1 32. R1f2 Rxf2 33. Kxf2 Nc2 34. Bf6 Rd6 35. g4 Nd4 36. Bxd4 cxd4 37. Ke2 d3+ 38. Kd2 Rd4 39. g5 hxg5 40. Rxg5 f6 41. Ra5 Rd7 42. Rb5 Kg7 43. Rxb4 f5 44. Rh4 Kh6 45. Rh3 Rd4 46. a3 a5 47. Rxd3 Rxd3+ 48. Kxd3 Kxh5 49. b4 axb4 50. axb4 Kg4 51. b5 f4 52. b6 Kf3 53. b7 Kg2 54. b8Q f3 55. Qb7 Kf2 56. Qb2+ 1-0

[Event "Agartala Dutta Memorial 3rd"]
[Site "Agartala"]
[Date "2023.11.02"]
[Round "2"]
[White "Koshin, Das"]
[Black "Pradeep, Tiwari"]
[Result "1/2-1/2"]
[ECO "E16"]
[WhiteElo "1275"]
[BlackElo "1854"]
[PlyCount "157"]
[EventDate "2023.11.01"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "IND"]
[SourceTitle "CB46_2023"]
[SourceDate "2023.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Be7 7. 0-0 d6 8. Nc3 Nbd7 9. Qc2 a6 10. e4 e5 11. d5 0-0 12. Ne1 Nh5 13. Nd3 Bg5 14. f4 exf4 15. Nxf4 Nxf4 16. Bxf4 Bf6 17. Qd2 Ne5 18. b3 Bc8 19. Rae1 Bd7 20. Ne2 Qe7 21. Nd4 g6 22. Nf3 Nxf3+ 23. Bxf3 Bg7 24. Bh6 Rae8 25. Bxg7 Kxg7 26. Bg2 Qe5 27. Qf4 Re7 28. Qxe5+ Rxe5 29. Re2 Rfe8 30. Rfe1 R8e7 31. Kf1 a5 32. a3 Re8 33. Kf2 h6 34. Re3 Rb8 35. Rc1 Rbe8 36. Rce1 f6 37. Bf3 h5 38. h4 Rh8 39. Rc1 Re7 40. Rcc3 Ra8 41. Bd1 Kh6 42. b4 axb4 43. axb4 Ra1 44. Re1 Rb1 45. b5 f5 46. exf5 Rxe1 47. Kxe1 Bxf5 48. Kd2 Ra1 49. Bc2 Ra2 50. Kd1 Bxc2+ 51. Rxc2 Ra3 52. Re2 Rxg3 53. Re7 Rg4 54. Rxc7 Rxh4 55. Ke2 Rf4 56. Rc6 h4 57. Rxd6 h3 58. Rd8 Kg5 59. Rh8 Kg4 60. c5 bxc5 61. b6 Rf7 62. d6 Kg3 63. Rg8 Rh7 64. Rxg6+ Kf4 65. d7 Re7+ 66. Kf2 Rxd7 67. Rc6 Rd2+ 68. Kg1 Kg3 69. Rg6+ Kf3 70. Rc6 Kg3 71. Rg6+ Kf4 72. Rc6 h2+ 73. Kh1 Kg3 74. Rg6+ Kh3 75. Rh6+ Kg4 76. Rc6 Kh3 77. Rh6+ Kg4 78. Rc6 Kg3 79. Rg6+ 1/2-1/2

[Event "Agartala Tripura Dutta Memorial 2nd"]
[Site "Agartala Tripura"]
[Date "2022.08.14"]
[Round "2"]
[White "Koshin, Das"]
[Black "Rios, Cristhian Camilo"]
[Result "0-1"]
[ECO "B14"]
[WhiteElo "1318"]
[BlackElo "2431"]
[PlyCount "90"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "IND"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. Nf3 0-0 6. Bd3 c5 7. a3 cxd4 8. exd4 Bxc3+ 9. bxc3 Qc7 10. Qb3 dxc4 11. Qxc4 Qxc4 12. Bxc4 b6 13. Bg5 Ne4 14. Bd2 Ba6 15. Be2 Rc8 16. Rc1 Bxe2 17. Kxe2 Nd6 18. Rc2 Nc4 19. Ra1 Nc6 20. Kd3 N6a5 21. a4 Rd8 22. Bf4 Rac8 23. Re1 Nc6 24. Nd2 Rxd4+ 25. cxd4 Nb4+ 26. Ke2 Nxc2 27. Nxc4 Rxc4 28. Kd3 Rxd4+ 29. Kxc2 Rxf4 30. f3 Rxa4 31. Rd1 g5 32. Kb3 Ra5 33. Rd7 Rd5 34. Rxa7 Rd2 35. Ra2 Rxa2 36. Kxa2 f5 37. Kb3 e5 38. Kc4 Kf7 39. Kd5 Kf6 40. g3 h5 41. h3 g4 42. hxg4 hxg4 43. fxg4 f4 44. Ke4 fxg3 45. Kf3 b5 0-1

