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Oswestry Chess Club
[Event "Darwinian Kts v Oswestry A"] [Site "Shrewsbury"] [Date "2024.10.08"] [Round "Brd 5"] [White "Van Kemenade, J."] [Black "Jeukens, Nathan"] [Result "1-0"] [ECO "B50"] [WhiteElo "1618"] [BlackElo "1610"] [Annotator "Rudy van Kemenade"] [PlyCount "115"] [GameId "2098782329877295"] [EventDate "2024.10.09"] [SourceVersionDate "2024.09.14"] {[%evp 0,16,29,37,43,60,61,54,61,74,69,39,45,52,44,25,37,11,18]} 1. e4 c5 2. Nc3 d6 3. Bc4 (3. f4) (3. g3 {main lines}) 3... e6 4. Nf3 Nf6 5. O-O a6 (5... Be7 6. d4 {main} (6. d3)) 6. a4 (6. d4 {alternative}) 6... Qc7 {24 games} (6... Be7 {143 games}) (6... Nc6 {49 games}) 7. d3 Nc6 8. Ne2 (8. d4 $11 {Cloud Engines- not yet played}) (8. Bg5 $11 {2-2-2}) (8. h3 $11 {3-1-2}) 8... d5 (8... h6 9. Re1 Be7 10. h3 Bd7 11. c3 g5 12. Nh2 Ne5 13. Ba2 Ng6 14. f3 b5 $11 {Barmin-Elfert, RUS ch Seniors 2009,0-1} (14... d5 $17)) 9. exd5 exd5 10. Ba2 (10. Bb3 Bd6 11. h3 O-O (11... h6 12. c3 g5 $15 {SF17}) 12. c3 h6 13. Be3 Bf5 14. Bc2 Rae8 $17 {Brooks-Olsen, BCCA/BL2 2021,0-1}) 10... Bd6 11. Ng3 (11. d4 c4 12. c3 Be6 13. Bb1 O-O-O 14. Ng3 $11 {SF17}) 11... Be6 12. Re1 O-O-O 13. Bd2 (13. c3 Rde8 14. Bg5 h5 15. h3 h4 (15... Bxg3 16. fxg3 Qxg3 17. Qd2 Bxh3 18. Bf4 Qg4 19. Bh2 Rh6 20. Qf2 Bxg2 21. Qxg2 Rg6 22. Qxg4+ Rxg4+ 23. Kf1 Rxa4 24. Bb3 Rxa1 25. Rxa1 Kd7 $11 {SF17}) 16. Nf1 Kb8 $15) 13... h5 14. Bg5 (14. Nf1 Bg4 15. h3 Nd4 16. hxg4 hxg4 17. Nxd4 Bh2+ 18. Kh1 cxd4 19. g3 Bxg3+ 20. Kg2 Bd6 21. Bg5 Rdg8 $15 {SF17}) 14... Rde8 (14... Bg4 $19 15. Nf1 (15. c3 h4 16. Nf1 h3 17. g3 d4 18. N1d2 Rd7 19. Bc4 Nh7 $19) 15... Nd4 16. Bxf6 gxf6 17. Bxd5 Bxh2+ 18. N1xh2 Rxd5 19. Re3 Rg8 20. Kh1 Nxf3 21. Nxf3 h4 $19 {SF17}) 15. h3 Bxg3 {after some thought} (15... Bxh3 $1 {SF17} 16. gxh3 Bxg3 17. Qd2 (17. fxg3 Qxg3+ 18. Kh1 (18. Kf1 Qxh3+ 19. Kg1 Qg3+ 20. Kf1 Ng4 $19) 18... Rxe1+ 19. Nxe1 Ng4 $19 {SF17})) 16. fxg3 Qxg3 17. Bh4 (17. Qd2 Bxh3 18. Bf4 Qg4 19. Bh2 h4 20. Kh1 g5 21. Rxe8+ Rxe8 22. Rg1 Nh5 23. Bxd5 $11 {SF17- here the equals sign definitely does not mean theposition is level- it means that both sides have chances}) 17... Qg6 (17... Qd6 18. c3 Ng4 $1 19. Qd2 $1 (19. b4 $5) 19... f6 20. b4 g5 21. bxc5 Qxc5+ 22. d4 Qd6 23. hxg4 gxh4 24. g5 fxg5 25. Nxg5 Nd8 26. Re5 $11 {SF17- again unbalanced position}) 18. Kf2 $6 (18. Ne5 Nxe5 19. Rxe5 Nd7 (19... Bxh3 20. Rg5 $18) 20. Re2 Bxh3 21. Bxd5 $11 {SF17}) (18. Kh1 {is a more usual human response to the threat against h3} Bg4 19. Rxe8+ Rxe8 20. Bxf6 Qxf6 21. hxg4 hxg4 22. Nh2 Kb8 23. Qxg4 Qxb2 24. Qf4+ Ka8 25. Qc1 Qd4 $11 {SF17- the Wh pieces lack coordination}) 18... Ng4+ (18... Bg4 $1 $19 {SF17} 19. Bxf6 Rxe1 20. Kxe1 Qxf6 21. Bxd5 Re8+ 22. Kf1 Nd4 23. c3 Nxf3 24. Bxf3 Re3 25. hxg4 hxg4 26. Kf2 Qf4 $19 {SF17}) 19. Kf1 Nh6 (19... d4 $1 20. Bxe6+ Rxe6 21. Rxe6 Qxe6 22. Qe2 Qxe2+ 23. Kxe2 Ne3 $19 {SF17}) 20. Qd2 (20. c3) 20... Nf5 (20... d4) 21. Bf2 Ng3+ (21... d4 22. Bxe6+ Rxe6 23. Rxe6 Qxe6 24. Re1 Qh6 25. Qe2 Qf4 26. Qe4 Qxe4 27. dxe4 Nd6 28. c3 Re8 $17 {SF17}) 22. Bxg3 (22. Kg1 h4 23. Qf4 $14 {SF17}) 22... Qxg3 23. Qf2 Qxf2+ 24. Kxf2 Nb4 $19 25. Bb1 Bd7 (25... Bf5 {leaves the Wh pieces struggling to enter the game}) 26. c3 Rxe1 27. Kxe1 Re8+ 28. Kf2 Nc6 $19 29. d4 cxd4 30. cxd4 f6 {Bl is still a pawn up after the turmoil} (30... Kc7) 31. Bg6 Re7 (31... Rh8 $19) 32. Bxh5 Bf5 33. Nh4 (33. Rd1) 33... Nxd4 (33... Be4 $17) 34. Rd1 $11 Re4 35. Rxd4 (35. Nxf5 Nxf5 36. Rxd5 Rf4+ 37. Bf3 $11 {SF17}) 35... Rxd4 36. Nxf5 Rf4+ (36... Rxa4 $11) (36... Rd2+ 37. Kf3 Rxb2 38. Nxg7 $11 {both SF17- the looks active, but the can come back for any dangerous pawns, while Wh's h paw is an assett- another unbalanced position}) 37. Ke3 {both sides have been traps, but Wh wins out in the end} Rxf5 (37... g5 38. Nd4 $18) (37... Rxa4 38. h4 g5 39. g3 Rb4 40. Bf7 $11 {SF17}) 38. Bg4 g6 39. Bxf5+ gxf5 {Bl has saved the material ,is even a pawn up. but the pawn structure remaining is awful.} 40. Kd4 {a very natural human move, but the engine has a fascinating refinement. Essentially Bl has a lost postion, the doubled f pawns are useless and Wh has a distant passed h pawn} (40. a5 Kd7 41. h4 {and when Bl goes to stop the h pawn, Wh wins o n the Q side}) 40... b5 41. axb5 axb5 42. Kxd5 Kd7 {Wh has more than one winning sequence} 43. h4 (43. b4 {Zugzwang; Wh gets runners on both sides and in the meantime the h pawn remains as a protected pawn}) 43... Ke7 44. Kc5 Kf7 45. Kxb5 Kg6 46. Kc4 Kh5 47. b4 (47. g3 Kg4 48. h5 {also appear to be winning, the text is more logical in following on}) 47... Kxh4 48. b5 Kg3 49. b6 Kxg2 50. b7 f4 51. b8=Q f3 {it needs to have reached f2 and be a single pawn for Bl to hope to draw this kind of position by hiding on h1} 52. Qb7 (52. Qg8+ Kf2 53. Kd3 f5 54. Qg5 {seems the quickest- forcing the Bl K in front of the pawn allows the Wh K to approach nearer}) 52... Kg3 53. Qg7+ (53. Kd3 {also}) 53... Kf2 54. Qxf6 Kg2 55. Qg5+ Kh2 56. Qh4+ Kg2 57. Qg4+ (57. Kd3 {appears to be quickest- endgame tablebases, but the text is easier to handle in terms of calculation needed}) 57... Kf2 58. Kd3 (58. Kd3 Kf1 59. Ke3 (59. Qxf3+ {automatic response which requires minimal calculation}) 59... f2 60. Kd3 (60. Qg6 Ke1 61. Qb1#) 60... Ke1 61. Qe2#) 1-0
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Annotated by