Game Viewer

Oswestry Chess Club

[Event "Darwinian Knights B - Oswestry B"]
[Site "Shrewsbury"]
[Date "2025.03.11"]
[Round "Bd 4"]
[White "Bonner, Dennis"]
[Black "Slegg, Gary"]
[Result "1/2-1/2"]
[Annotator "Slegg,Gary"]
[ECO "A43"]
[WhiteElo "1491"]
[BlackElo "1536"]
[PlyCount "51"]
[GameId "2154546722787433"]
[EventDate "2025.??.??"]

{[%evp 0,51,17,34,32,8,12,10,18,-7,24,-33,24,28,49,52,44,59,55,47,49,45,53,55,54,119,51,0,75,64,100,80,136,85,103,113,118,-37,-83,-29,-122,-36,-23,-11,-2,-8,3,-19,-6,-24,-177,-45,-176,-70] A43: Schmid Benoni} 1. d4 c5 2. e3 cxd4 3. exd4 Nf6 4. Bf4 (4. Bd3 g6 5. c3 Bg7 6. Bf4 O-O 7. Qd2 d6 8. Bh6 Nc6 9. Bxg7 Kxg7 10. Nf3 Bg4 11. Be2 e5 12. O-O Re8 13. Na3 Ne4 14. Qc2 exd4 15. h3 Bf5 16. Bd3 dxc3 17. bxc3 Qf6 18. Nc4 Qxc3 {Bortnyk,O (2607)-Naroditsky,D (2619) chess.com INT 2023 0-1 (84)}) (4. f4 d6 5. Nf3 g6 6. Bd3 Bg7 7. O-O O-O 8. Qe1 Nc6 9. c3 Re8 10. Bb5 Bd7 11. Qh4 a6 12. Ba4 Nxd4 13. Bxd7 Nxf3+ 14. Rxf3 Qxd7 15. h3 b5 16. f5 Rac8 17. Nd2 Rc5 18. fxg6 hxg6 {Harriott,T (1924)-Noy,E (2216) chess.com INT 2024 ½-½ (58)}) 4... b6 $146 {[6 games still in database, played eg by Pranav twice & also Goryachina. Then by further transposition, there are still precedents till move 13.-vk]} (4... g6 5. Nc3 (5. Nf3 Bg7 6. Nc3 d6 7. Qd2 O-O 8. O-O-O Nbd7 9. Bh6 b6 10. h4 Bxh6 11. Qxh6 Ng4 12. Qd2 h5 13. Ng5 Ndf6 14. f3 Nh6 15. Bd3 Bf5 16. Nce4 Nxe4 17. fxe4 Bg4 18. Rdf1 Qc7 19. Kb1 Rac8 {Qiao,C (1736)-Blanco Gramajo,C (2065) Chess.com INT 2020 1-0}) 5... Bg7 6. Qd2 O-O 7. O-O-O Re8 8. Bh6 Bh8 9. h4 d5 10. h5 Nc6 11. hxg6 fxg6 12. f3 Be6 13. g4 Bf7 14. Bg5 e5 15. Qh2 h5 16. gxh5 gxh5 17. Nge2 exd4 18. Nxd4 Nxd4 19. Rxd4 {Qiao,C (1785)-Grinev,V (2418) chess.com INT 2023 1-0}) 5. c3 Bb7 6. Nd2 d5 {[%eval 79,21] [the purpose of b6 was to put the B onto a nice clear diagonal. This move obstructs it for no clear reason(eg like stopping e4 might have been)} (6... Na6 $11 {[%eval 26,20] remains equal.}) (6... g6 $11 {added by vk} 7. Ngf3 Bg7 8. Bc4 (8. Be2 O-O 9. h3 d6 10. O-O Nbd7 11. Bh2 Nd5 12. Re1 Bh6 13. Bf1 a6 14. c4 Nc7 15. d5 Bg7 16. Rb1 b5 17. b3 Nc5 18. Bf4 e6 19. dxe6 N7xe6 20. Be3 b4 21. Qc2 f5 22. Bd3 Qf6 23. a4 Qc3 24. Qxc3 bxc3 25. Bc2 cxd2 26. Bxd2 a5 27. b4 axb4 28. Bxb4 Be4 29. Bxe4 fxe4 30. Nd2 Rxa4 31. Nxe4 Bd4 32. Nxc5 Nxc5 33. Re7 Rb8 34. Rd1 Bf6 {0-1 Ribeiro,J-Nilsson,Z Olympiad-13 Preliminaries D Munich 1958 (8)}) 8... O-O 9. O-O d6 10. Re1 h6 11. h3 Nh5 12. Bh2 Nc6 13. Qc2 Nf6 14. Rad1 Rc8 15. Qd3 Rc7 16. Qxg6 Na5 17. Bxf7+ Rxf7 18. Bf4 Ne8 19. Qg3 Rf6 20. Nh2 Kf7 21. Ng4 Rg6 22. Nf3 h5 23. Nh4 hxg4 24. Nxg6 Kxg6 25. Qxg4+ Kh7 26. Rd3 Qd7 27. Qh4+ Kg8 28. Rg3 e6 29. Rg6 Bd5 30. Re3 Qe7 31. Bg5 Qf7 32. Qh5 Nc4 33. Re2 Nxb2 34. Rxb2 Be4 35. Rxg7+ Nxg7 36. Qh4 Bd5 37. Bd2 Qg6 38. Qd8+ Ne8 39. Bg5 Rxc3 40. h4 Bb7 41. Re2 Qb1+ 42. Kh2 Rh3+ 43. Kxh3 Qh1+ 44. Kg4 Qxg2+ 45. Kh5 Qf3+ {0-1 Michna,M (2376)-Majdan,J (2361) BL 1718 (Women) Germany 2017 (5.1)}) (6... d6 {t(aking away the e5 square from W ( control of which is the main idea behind the initial London System setup- looks far better; = ,though 1 Wh win, 1 draw-vk]}) 7. Ngf3 $16 {[#] Strongly threatening Bxb8.} e6 8. Bd3 {White is better.[3-0-1 vk]} Bd6 9. Bg3 (9. Bxd6 Qxd6 10. O-O $16 {[Cloud Engines-vk]}) 9... O-O 10. Ne5 Nc6 {[%eval 55,20]} (10... Ba6 $11 {[%eval 20,19] deserves consideration.}) 11. O-O $14 {[8 games, 56% for Wh-vk]} (11. Qe2 {[23 games 63% for Wh- vk]}) (11. f4 {25 games, 74% for Wh-vk]}) 11... Qc7 {[%cal Rc6e5]} 12. f4 {[%eval 21,19]} (12. Re1 $14 {[%eval 63,19] should be considered.[3-0, sF17 then gives 12..g6 as best-vk]}) 12... Nd7 {[%eval 69,20]} (12... Ne7 $11 {[%eval 21,19]} 13. Qe2 Nf5 {[Cloud Engines, 1 Wh win, two draws-vk]}) 13. Qh5 {[%csl Gd3][%cal Rh5h7]} Nf6 (13... f5 {added by vk} 14. Ndf3 (14. Nxd7 Qxd7 15. Rae1 $16 {SF17}) 14... Nf6 15. Qh3 Rae8 16. Be1 Bxe5 17. fxe5 Ne4 18. Nd2 Qf7 19. Nxe4 dxe4 20. Bxe4 Qd7 21. Bc2 Na5 22. b4 Nc4 23. Rf4 g5 24. Qg3 Qg7 25. Rf2 f4 26. Qd3 Ne3 27. Bb3 Qh6 28. h3 g4 29. Bd2 gxh3 30. g3 fxg3 {0-1 Gonzalez Curbelo,P (1614)-Gil Ojeda,L (1502) Tenerife-chT Primera 1819 2018 (14.4)}) 14. Qh3 {White is much more active. The black rooks are badly placed.[looks like Wh is close to winning as there are few Bl defenders-vk} a5 {[%eval 127,21]} (14... Ne7 $1 $14 {[%eval 63,19] [essential- more defenders & unblocks b7 B, so Ne4 no longer loses a pawn-vk]}) 15. Bh4 $16 {White threatens Bxf6 and mate.} (15. Ng4 $1 $18 {SF17} Ne4 16. Bxe4 dxe4 17. Nf6+ $1 gxf6 18. Nxe4 Be7 (18... Kg7 19. Bh4 $18 (19. Nxf6 $18)) 19. f5 e5 20. d5 Rfd8 (20... Na7 21. d6 $18) 21. Qh6 Rd6 22. Bh4 Bf8 23. Qh5 Bg7 24. Nxd6 Qxd6 25. dxc6 $18 {SF17- not easy sequences to find for a human, after the first move, but they do have a logic-vk}) 15... Ne4 16. Nxe4 dxe4 17. Bxe4 {[%cal Oh4f6] White wants to mate with Bf6!} f5 18. Bc2 {[%eval -50,23]} ({Better is} 18. Bd3 $16 {[%eval 145,19] [when Wh is a clear pawn up and still keeps attacking chances-vk}) 18... Nxd4 $1 $15 {[%mdl 64] [#] Pin} 19. Bd3 {[%eval -70,24]} (19. Bd1 $1 $11 {[%eval -20,21]} Nc6 20. Nd3) 19... Nc6 20. Nxc6 Qxc6 {[%eval -11,20] I couldn't decide whether it was best to recapture with the Queen or Bishop} (20... Bxc6 $15 {[%eval -67,21]} 21. Qg3 h6) 21. Be2 Bc5+ {[%eval -1,23]} (21... Qc7 $15 {[%eval -36,21]}) 22. Kh1 $11 Qc7 23. Bf3 Rae8 24. Bxb7 Qxb7 25. Qf3 {[%eval -63,20]} (25. Rfe1 $11 {[%eval -13,20]}) 25... Qxf3 $15 26. Rxf3 {Weighted Error Value: White=0.30/Black=0.18 (very precise) [SF17 gives weighted error of 32 vs 30, = centipawn 26 & 24-reasonable performance for the grades-vk]} (26. Rxf3 e5 {as intended by Bl if play had carried on, best , though the position is level overall -vk}) 1/2-1/2

Annotated by