Posthuma, Joshua vs Sam, Gabriel
35th Annual Chicago Open · Round 6 · 2026.05.24 · 1/2-1/2 · E00 Catalan Opening
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PGN
[Event "35th Annual Chicago Open"]
[Site "Lichess"]
[Date "2026.05.24"]
[Round "6"]
[White "Posthuma, Joshua"]
[Black "Sam, Gabriel"]
[Result "1/2-1/2"]
[PlyCount "158"]
[WhiteElo "2378"]
[WhiteFideId "2096889"]
[WhiteTitle "IM"]
[BlackElo "2214"]
[BlackFideId "75000776"]
[BlackTitle "FM"]
[ECO "E00"]
[Source "LichessBroadcast"]
[SourceQuality "2"]
[ImportDate "2026-06-04"]
1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Nd2 c5 5. a3 Bxd2+ 6. Qxd2 cxd4 7. Nf3 b6 8.
Bg2 Bb7 9. Qxd4 O-O 10. b4 Nc6 11. Qb2 Rc8 12. Bf4 Ne7 13. Rc1 Be4 $6
{ Inaccuracy. d6 was best. } 14. O-O d5 15. Rfd1 Ng6 16. Be3 Qe7 17. c5 Ng4
18. Bd2 bxc5 19. bxc5 Bxf3 20. exf3 N4e5 21. Bc3 Nc4 22. Qa1 Rfe8 $6
{ Inaccuracy. f5 was best. } 23. f4 $6 { Inaccuracy. Bxg7 was best. } 23... f5
$2 { Mistake. Qf8 was best. } 24. Rxd5 exd5 25. Bxd5+ Kh8 26. Bxc4 Nf8 $6
{ Inaccuracy. h6 was best. } 27. Re1 Qb7 28. Rxe8 Rxe8 29. c6 Qe7 30. Qb1 Qxa3
31. Be5 Ng6 32. Bf7 $6 { Inaccuracy. c7 was best. } 32... Rc8 33. Bxg6 $2
{ Mistake. Bd5 was best. } 33... hxg6 34. c7 Qe7 35. Qb7 Qd7 36. Qxa7 Qd1+ 37.
Kg2 Qd5+ 38. Kh3 Kg8 $4 { Blunder. Qc4 was best. } 39. Qb8 $4
{ Blunder. Qa6 was best. } 39... Qe6 40. Qb7 Kf7 41. Kg2 Kg8 42. Kf3 Kh7 43.
Ke3 Qd7 44. h3 Kg8 45. Qb6 Kh7 $6 { Inaccuracy. Kf7 was best. } 46. Qd6 Qe8
47. g4 Ra8 48. Kf3 fxg4+ $6 { Inaccuracy. Rc8 was best. } 49. hxg4 Kg8 $6
{ Inaccuracy. Ra2 was best. } 50. Kg3 Kh7 51. Kh4 Kg8 $6
{ Inaccuracy. Ra2 was best. } 52. Kg5 Rc8 53. Qxg6 Qe7+ 54. Kf5 $2
{ Mistake. Kh5 was best. } 54... Rxc7 55. Bxc7 Qxc7 56. Qe6+ Kh7 57. Kg5 Qd8+
58. Kh5 Qd2 $6 { Inaccuracy. Qd4 was best. } 59. Qe4+ { [%clk 0:00:00] } 59...
Kg8 { [%clk 0:06:17] } 60. g5 { [%clk 0:00:00] } 60... Qd1+ { [%clk 0:06:19] }
61. Kg6 { [%clk 0:00:00] } 61... Qd6+ { [%clk 0:06:19] } 62. Kh5 Qd1+
{ [%clk 0:06:34] } 63. Kg6 { [%clk 0:00:00] } 63... Qd6+ 64. Kf5
{ [%clk 0:00:00] } 64... Qc5+ $2 { Mistake. g6+ was best.[%clk 0:06:57] } 65.
Qe5 $6 { Inaccuracy. Kg4 was best. } 65... Qc2+ { [%clk 0:07:18] } 66. Qe4 $6
{ Inaccuracy. Kg4 was best.[%clk 0:00:00] } 66... Qc5+ $4
{ Blunder. g6+ was best.[%clk 0:07:21] } 67. Kg4 { [%clk 0:00:00] } 67... Qxf2
68. Qe8+ { [%clk 0:00:00] } 68... Kh7 { [%clk 0:07:51] } 69. Qe4+ Kg8
{ [%clk 0:08:06] } 70. Qd5+ { [%clk 0:00:00] } 70... Kh8 71. Qa8+
{ [%clk 0:00:00] } 71... Kh7 { [%clk 0:08:36] } 72. Qe4+ $4
{ Blunder. Qh1+ was best.[%clk 0:00:00] } 72... Kg8 73. f5 $4
{ Blunder. Qe6+ was best. } 73... Qg1+ 74. Kh5 { [%clk 0:00:00] } 74... Qh2+
{ [%clk 0:09:12] } 75. Kg4 Qg1+ 76. Kh5 Qh2+ { [%clk 0:10:02] } 77. Qh4
{ [%clk 0:00:00] } 77... Qe2+ 78. Qg4 { [%clk 0:00:00] } 78... Qh2+
{ [%clk 0:10:03] } 79. Qh4 { [%clk 0:00:00] } 79... Qe2+ { [%clk 0:09:36] }
1/2-1/2