[Event "Oswestry A v Telepost A"]
[Site "Oswestry"]
[Date "2024.09.19"]
[Round "Board 1"]
[White "Ferrington, Nigel M"]
[Black "Van Kemenade, R."]
[Result "0-1"]
[ECO "A27"]
[WhiteElo "2126"]
[BlackElo "1883"]
[Annotator "kemen"]
[PlyCount "134"]
[GameId "2091678051930143"]
[EventDate "2024.?Board ??"]

{[%evp 0,9,25,-11,-17,-58,-51,-30,-11,-2,67,12]} 1. c4 e5 2. g3 Nc6 3. Nc3 f5 (3... Nf6 4. Bg2 g6 5. e4 Bg7 6. Nge2 d6 7. O-O O-O 8. d3 Nh5 9. Be3 f5 10. exf5 gxf5 11. f4 {Ferrington-Ireland, Shropshire op 2019, 1-0}) 4. Nf3 (4. Bg2 Nf6 5. d3 (5. e3 {main lines})) 4... d6 (4... Nf6 5. d4 e4 6. Nh4 {main} (6. Ng5 {2nd}) 6... d5 $6 7. Bg5 dxc4 8. e3 Na5 $2 9. Bxf6 Qxf6 10. Qa4+ Nc6 11. d5 $18 {C Morris-Van Kemenade,West Wales Open 2022,1-0}) 5. d4 (5. d3 {also played}) 5... e4 6. Nh4 (6. d5 Ne5) (6. Ng5 Be7 {main lines}) 6... Be7 {47% for Wh} (6... Nf6 {transposes to many more games,63% for Wh}) 7. Ng2 Bf6 (7... Nf6 {50% 28 games}) 8. e3 (8. Be3 g6 {2-0} (8... Nge7 {0-1})) 8... Nge7 9. Nf4 O-O 10. Be2 (10. h4 {expected by Bl} Ng6 11. Nxg6 hxg6 12. Nd5 Ne7 13. Nf4 c5 14. d5 $11 {Stone-Biemans, Gent Taminco op, 2012, draw agreed}) 10... g5 $5 {Bl wanted an unbalanced game , rather than be ground down by a higher rated player} (10... Nb4 11. a3 Na6 12. b4 c6 13. O-O $14 {SF17}) (10... Qe8 11. Qb3 Kh8 12. Bd2 a5 13. a3 a4 14. Qc2 Bd7 {Sidhant-Saptorshi, IND ch U19,2016,1/2-1/2}) 11. Nh5 (11. Nfd5 Nxd5 12. Nxd5 Bg7 13. h4 h6 14. hxg5 hxg5 15. Qb3 Ne7 16. Nxe7+ Qxe7 17. Bd2 $16) 11... Ng6 (11... Bh8) 12. g4 (12. Nxf6+ Qxf6 (12... Rxf6 13. b3 Nce7 14. Bb2 a6 15. Qd2 Rb8 16. O-O-O $18 {SF17}) 13. Nd5 Qg7 14. h4 $18 {SF17, though the N has moved 6 times and the B only twice. Why both players were not too interested in the trade}) 12... Bh8 (12... f4 {was considered better by Bl during the later stages as this would have taken away some wWh control over d5.} 13. Nxe4 Bh8 14. f3 Qe7 15. O-O Bd7 16. Kh1 $16 {SF17}) (12... Nh4 {considered, but looked unclear. SF17 even gives Bl a slight advantage in some lines} 13. Qb3 (13. Ng3 fxg4 14. Bxg4 Bg7 (14... Ng2+ 15. Kf1 Nh4 16. Ngxe4 Bg7 17. Rg1 h6 $11) 15. Ngxe4 Qe8 16. Bh5 Ng2+ 17. Kf1 Bh3 18. Bxe8 Nxe3+ 19. Ke1 Nxd1 20. Bxc6 Nxc3 21. Nxg5 bxc6 22. Nxh3 Rae8+ 23. Be3 Bxd4 24. Rg1+ Kh8 25. bxc3 Bxe3 26. fxe3 Rxe3+ 27. Kd2 Rxh3 28. Rg2 $11 {SF17- a typical engine mess}) 13... a5 14. Bd2 Bxd4 (14... a4 15. Nxa4 fxg4 16. O-O-O Nf3 17. Be1 Bf5 $11) 15. c5+ Kh8 16. exd4 Nxd4 17. Qd5 Nhf3+ 18. Bxf3 Nxf3+ 19. Kd1 dxc5 20. Kc2 $11 {SF17}) 13. Ng3 (13. gxf5 Bxf5 14. Ng3 Nh4 15. Nxf5 Rxf5 16. Nxe4 Qe7 17. Ng3 Ng2+ 18. Kf1 Nxe3+ 19. Bxe3 Qxe3 20. Nxf5 Qh3+ 21. Kg1 Qxf5 22. Bg4 $16 {SF17}) 13... f4 14. Ngxe4 Nh4 15. Rg1 Re8 {aiming at the K in the middle- SF17 does it more effectively} (15... Qe7 16. Bd2 b6 17. Qb1 Re8 $11 {SF17}) (15... a5 16. Bd2 Bd7 17. c5 d5 18. Nxd5 fxe3 19. Bxe3 Be6 20. Ndc3 Bxd4 $11 {SF17}) 16. Qb3 {SF17} (16. Bd2 a5 17. a3 Qe7 18. Qc2 Bd7 19. O-O-O $16 {when} Nb4 $1 20. Qb1 $1 (20. axb4 axb4 21. Kb1 $11) 20... c5 21. d5 Be5 22. exf4 gxf4 23. f3 $16 {SF17}) 16... Na5 (16... a5 17. Bd2 a4 18. Qa3 Bxd4 19. O-O-O Bxc3 20. Nxc3 f3 21. Bf1 b6 22. Nd5 Ne5 $14 {SF17}) 17. Qb5 {Wh tries to breakthrough quickly, but now Bl gets cahances bagainst Wh's K} (17. Qc2 {SF17}) 17... c5 $11 18. Nxd6 {best} (18. dxc5 Bxc3+ 19. Nxc3 Bd7 20. Qb4 Nc6 21. Qxb7 Rb8 22. Qa6 dxc5 $17 {SF17}) 18... cxd4 {SF17 second line} (18... Re6 19. Nce4 b6 20. Bd2 Bd7 21. Qa6 Bc8 $11) 19. Qxe8+ (19. Nxe8 dxc3 20. Nd6 Qxd6 21. Qxg5+ Ng6 22. Qxa5 cxb2 23. Bxb2 Bxb2 24. Rd1 Qb6 25. Qxb6 axb6 26. h4 fxe3 27. fxe3 Kg7 (27... Nxh4 28. Rd8+ Kg7 29. g5 $11) 28. Kf2 Nxh4 29. a4 Be5 $15 {SF17}) 19... Qxe8 20. Nxe8 dxc3 21. bxc3 Bxc3+ (21... f3 22. Bd3 Be5 {SF17 was Bl original idea, hoping to pick up the N, but then saw that Wh had Ba3 available} 23. c5 b6 24. Kd2 bxc5 25. Ba3 Bd7 26. Bxc5 Bxe8 27. h3 $11 {SF17}) 22. Bd2 Bxa1 23. Nc7 (23. Bxa5 fxe3 24. fxe3 Be5 25. Bc7 Bc3+ 26. Kd1 Bd7 27. Nd6 Be5 28. h3 Rf8 29. Rf1 $11 {SF17}) 23... Rb8 (23... fxe3 24. fxe3 (24. Bxa5 exf2+ 25. Kxf2 Bd4+ 26. Kg3 Rb8 27. Rb1 Bd7 $17 {SF17}) 24... Rb8 25. Bxa5 Be5 26. Nd5 Bxh2 27. Rh1 Be5 28. Ne7+ Kg7 29. Nxc8 Rxc8 30. Kd2 $11 {Sf17}) 24. Bxa5 b6 {this could have cost Bl the game- part of the idea was to get the B to b7.} (24... fxe3) 25. Bb4 Be5 26. Nd5 f3 27. Bd3 Bxh2 28. Rh1 Be5 29. Ne7+ Kg7 30. Nf5+ (30. Nc6 $18 {missed by both players}) 30... Bxf5 31. Bxf5 Nxf5 32. gxf5 Rc8 $19 {targetting the back rank} (32... Rd8 $1 {SF17 is even stronger as Wh will be running out of .} 33. Rg1 h6 34. Rg4 Rd3 35. Rg1 a5 36. Bd2 Ra3 37. Bc1 Rxa2) 33. Be7 (33. Kd2 Rxc4 34. Be7 h6 35. Kd3 Ra4 36. a3 g4 37. e4 {and Wh is still fighting, though Bl does have a breakthrough} Kf7 38. Rxh6 g3 $1 {seen as a possibility in some lines by Bl during the game} 39. fxg3 f2 40. Ke2 Rxe4+ 41. Kxf2 Bd4+ 42. Kf3 Re3+ 43. Kf4 Rxe7 $19 {Sf17}) 33... Rxc4 (33... Rc7 34. Ba3 Rd7 35. Bb4 Rd3 {SF17- reverting to its preferred plan}) 34. f6+ Bxf6 35. Bxf6+ Kxf6 36. Rxh7 Ra4 (36... Kf5 37. Rxa7 Rc1+ 38. Kd2 Rf1 {SF17- but the R & P ending as played leaves Wh with no chances, just a long holding exercise}) 37. Rh8 g4 {safeguards the Bl pawns} (37... Kf5 {to infiltrate with the K may well be quickest} 38. Rh3 Ke4 39. Kf1 Rxa2 40. Kg1 Ra1+ 41. Kh2 Rf1) 38. Rg8 Kf5 39. Rf8+ Ke5 40. Rg8 Kd5 (40... Rxa2 41. Rxg4 a5 42. Rf4 b5 43. Rxf3 b4 {leaves the K in a better position, and Wh's pawns are far to slow and his K is still cut off}) 41. Rg5+ Kc6 42. Rg6+ Kb5 43. Rg5+ Ka6 44. Rg6 Ka5 45. Kd1 Rxa2 46. Rxg4 Rxf2 47. Rf4 b5 48. e4 b4 49. e5 b3 50. Kc1 Re2 {Bl thought there might have been a chance to finish the game quicker here, though SF17 prefers the move played} (50... Rc2+ 51. Kd1 (51. Kb1 f2 52. Rf3 Re2 {is certainly over}) 51... Rf2 52. Kc1 Re2 {just transposes}) 51. Rxf3 Kb4 52. Rf6 Rxe5 53. Ra6 Ra5 54. Rh6 Rc5+ 55. Kb2 Rc2+ {it seems that other moves draw-tablebases} 56. Kb1 a5 57. Rb6+ Ka3 58. Rh6 Rg2 59. Rh1 a4 60. Rf1 Rg3 61. Rh1 Kb4 (61... b2 62. Kc2 Ka2 {is another way}) 62. Rh4+ Kc3 63. Rh1 a3 64. Rf1 Re3 (64... a2+ 65. Ka1 Kb4 66. Rf4+ Ka3 {also}) 65. Rc1+ Kd2 66. Ka1 b2+ (66... Re1 {also}) 67. Ka2 bxc1=N+ (67... Re1 {also}) 0-1

[Event "Oswestry A v Telepost A"]
[Site "Oswestry"]
[Date "2024.09.19"]
[Round "Board 2"]
[White "Bailey, Adrian"]
[Black "Zabrocki, Philip"]
[Result "0-1"]
[ECO "E94"]
[WhiteElo "1779"]
[BlackElo "1975"]
[Annotator "kemen"]
[PlyCount "70"]
[GameId "2091901314734285"]
[EventDate "2024.09.20"]

{[%evp 0,70,25,25,11,-10,44,32,40,40,41,41,30,38,28,45,44,16,25,15,18,-108,-96,-111,-107,-101,-100,-178,-175,-175,-185,-225,-219,-303,-248,-236,-253,-250,-220,-246,-262,-391,-437,-492,-505,-503,-513,-521,-528,-663,-663,-670,-318,-443,-302,-310,-311,-316,-310,-302,-299,-352,-361,-1465,-1556,-29993,-2092,-2869,-260,-29995,-29996,-29999,-29999]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 (6. Bd3 Bg4 7. h3 Bxf3 8. Qxf3 Nc6 9. Be3 Nd7 10. d5 Nd4 11. Qd1 c5 {Walker-Zabrocki,Southend op 2001,0-1}) 6... Nbd7 (6... e5 7. O-O Nc6 8. d5 Ne7 9. Qc2 Ne8 10. Bg5 h6 11. Bxe7 Qxe7 12. b4 f5 {Bailey-Van Kemenade, Lichess Summer 2024,1-0}) 7. O-O e5 8. d5 Nc5 9. Qc2 a5 10. Rb1 $2 (10. Be3 Nfd7 11. Qd2 f5 12. Bh6 fxe4 13. Bxg7 Kxg7 14. Ng5 Nf6 {Bailey-White, 4NCL Online 2022,0-1}) (10. Bg5 {main}) 10... Nfxe4 11. Nxe4 Nxe4 12. Be3 f5 $19 {Bl is a pawn up with a strong centre and will soon be attacking Wh's K; 1-2-8} 13. b4 $146 (13. Nd2 {best try- Cloud Engines.}) 13... axb4 14. Rxb4 f4 15. Bc1 (15. Bd3 Nf6 16. Bd2 Nd7 $19 {SF17}) 15... Nc5 16. Rd1 Bf5 (16... e4 17. Nd4 f3 $19 {SF17} 18. Bf1 fxg2 19. Bxg2 Nd3 $19) 17. Qd2 b6 18. a3 g5 19. h3 h5 20. Bb2 g4 21. hxg4 hxg4 22. Nh2 Qh4 23. Qe1 Rf6 24. g3 Qh5 25. f3 Qh3 (25... Rh6 26. Qf2 gxf3 27. Bxf3 fxg3 28. Qxg3 Rg6 29. Bxh5 Rxg3+ 30. Kf2 Rh3 $19 {SF17}) (25... fxg3 26. Qxg3 gxf3 27. Bxf3 Rg6 {SF17}) 26. Bf1 Qxg3+ (26... Qh5 {SF17}) 27. Qxg3 fxg3 28. Nxg4 Bxg4 29. fxg4 Bh6 (29... Rf2 {SF17}) 30. Kg2 Ne4 (30... Rf2+ 31. Kxg3 Ne4+ 32. Kh3 Kf7 {mating, SF17}) 31. Bd3 Rf2+ 32. Kg1 Be3 (32... Ng5 $1 {SF17- mate in 3}) 33. Bxe4 Raf8 (33... Rh2+ 34. Kf1 Rf8+ 35. Ke1 Rff2 {SF17}) 34. Bf5 (34. Rd3 Bc5 $19 {still winning, but there is no immediate mate}) 34... Rd2+ 35. Kh1 (35. Kf1 g2+ 36. Ke1 g1=Q#) 35... Rh2# 0-1

[Event "Oswestry A v Telepost A"]
[Site "Oswestry"]
[Date "2024.09.19"]
[Round "Board 3"]
[White "Bench, Fred"]
[Black "Fisher, Peter S"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "1792"]
[BlackElo "1670"]
[Annotator "kemen"]
[PlyCount "65"]
[GameId "2091921082639410"]
[EventDate "2024.09.20"]

{[%evp 0,20,25,25,47,17,17,11,20,5,31,20,33,11,26,16,42,-5,7,7,0,20,20]} 1. e4 c5 2. d4 cxd4 (2... Nc6 3. dxc5 Qa5+ 4. Nc3 Qxc5 5. Be3 Qa5 6. Bc4 {Bench-Slegg, Shropshire League 2022,1-0}) 3. c3 {the Morra Gambit} dxc3 4. Nxc3 d6 (4... Nc6 {main- as it happens this N never gets out and dies on its starting point on move 31.}) 5. Nf3 e6 (5... Nc6) 6. Bc4 a6 7. O-O {a comment here is that up to now Bl's response to Wh's gambit has been to move a pawn 3 times, each time allowing Wh to develop a piece. And yet , when Bl does bring a pice out, the main continuation ist o move yet another pawn, which gives Wh only 45%.} Nf6 {in retrospect it is difficult to find an individual move to establish where Bl goes wrong in this game. But one reason is a neglect of control over e5. Hence theory suggests that Bl needs to play Ne7-g6.} (7... b5 8. Bb3 Ra7 $1 {42% for Wh}) 8. Qe2 Qc7 {a standard place for the Q in the Sician, but then there is normally a pawn on c2. Here the open file will create problems later on} 9. Rd1 Be7 10. Bf4 {the N goes offside and loose. Bl is virtually forced to occupy e5 now before Wh does} Nh5 {The N goes offside & loose. It will be forced to retreat and in the meantime the B is driven back to a square it is quite happy on. Bl is here virtually forced to occupy e5 before Wh gets there instead} (10... e5 11. Bg5 Nbd7 12. Rac1 Qb8 {1-0-4}) 11. Be3 O-O (11... Nc6 12. Rac1 O-O 13. Bb3 Nf6 {40% for Wh in 20 games} 14. Nd5 exd5 15. exd5 {2-2-4}) 12. Bb3 (12. Rac1 {2-0}) 12... b5 $2 (12... Bd7 13. Rac1 Bc6 (13... Nc6 $11 14. Nd5 exd5 15. exd5 Nf6 16. dxc6 bxc6 $11 {0-2}) 14. Nd4 Nf6 15. f4 Nbd7 16. g4 (16. f5 $16) 16... Nc5 $11 {Anchondo-Garamendi, San Francisco Universe op 1997,0-1}) (12... Nc6 $11 {SF17}) 13. Rac1 $18 {Cloud Engines} Qb7 (13... Nc6 14. Nd5 $18) 14. Nd5 $1 {the first of a number of wh square invasions that Bl can scarcely accept} (14. e5 dxe5 15. Nd5 Bd8 16. Nxe5 $18 {SF17}) 14... Bd8 15. Nd4 (15. e5 $1 dxe5 16. Nxe5 Nf6 17. Nxf6+ Bxf6 18. Bd4 $18 {SF17}) 15... Nf6 16. Nxf6+ Bxf6 17. Nf5 $1 Be7 (17... exf5 18. Bd5 Qe7 19. Bxa8 Nd7 20. exf5 $18 {SF17, may be Bl's best bet}) 18. Nxe7+ (18. Bd4 $1 exf5 19. Bd5 Qd7 20. Bxa8 $18 {SF17}) (18. e5 Nc6 19. Nxe7+ Nxe7 20. exd6 Nc6 21. Bg5 Bd7 22. Rc3 $18 {SF17}) 18... Qxe7 19. e5 Rd8 (19... d5 {still loses an exchange but keeps a pawn}) 20. exd6 Qb7 21. Bg5 $1 Re8 22. Bd5 {a third wh square entry} Qd7 23. Bxa8 f6 24. Rc7 (24. Bxf6 $1 {Sf17} gxf6 25. Rc7 Rf8 26. Qh5 $18) 24... Qd8 25. Rdc1 (25. Qh5 $1) (25. Be4 $1 {both Sf17}) 25... Bd7 26. Be3 a5 27. Bb7 Kf8 28. Qh5 Kg8 29. Ba7 {an intriguing position} g6 30. Qh6 Rf8 31. Bxb8 Rf7 32. Rc8 Bxc8 33. Rxc8 1-0

[Event "Oswestry A v Telepost A"]
[Site "Oswestry"]
[Date "2024.09.19"]
[Round "Board 4"]
[White "Van Kemenade, J."]
[Black "Parker, Ethan"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1625"]
[BlackElo "1706"]
[Annotator "kemen"]
[PlyCount "60"]
[GameId "2091884523504269"]
[EventDate "2024.09.20"]

{[%evp 0,9,25,17,31,36,49,13,35,-59,-56,-66]} 1. e4 c5 2. Nc3 e6 3. d3 (3. g3) (3. f4 {main lines}) 3... d5 4. Qe2 d4 5. Nd1 {3-2-2} (5. Nb1 {0-4}) 5... Nc6 6. f4 Nf6 (6... e5 {transposes to 21 games}) 7. Nf3 (7. g4 {2-0}) 7... Be7 8. g3 O-O 9. Bg2 Qc7 10. O-O e5 (10... b6 $14 {1-1}) 11. f5 $16 {SF17 Wh has better chances on the K side than Bl's more longrange ones on the Q side} b5 12. Nf2 Ba6 13. g4 $18 c4 14. Bg5 (14. g5 {seen as preferable by both in pm} Nh5 (14... Ne8 15. Ng4 Bd8 16. Kh1 Qd6 17. Bd2 Rc8 18. f6 $18) 15. Nxe5 (15. f6 gxf6 16. Ng4 {also}) 15... Nxe5 16. Qxh5 f6 17. g6 h6 18. Ng4 Nxg4 19. Qxg4 Bb7 20. Bf4 Qd7 21. Rae1 $18 {SF17}) 14... h6 15. Bxf6 (15. Bc1 {avoids a c3 reply if B goes to d2 SF17 & Rudy} Rab8 16. h4 $16) 15... Bxf6 $15 16. h4 Qe7 17. Nh3 (17. g5 hxg5 18. Ng4 gxh4 19. Nxf6+ Qxf6 20. Bh3 Rac8 $17 {SF17}) 17... Bxh4 $17 18. g5 Bxg5 19. Nfxg5 hxg5 20. f6 $5 (20. Qh5 f6 21. Kf2 Qf7 22. Qe2 Rfc8 $19 {SF17}) 20... gxf6 21. Rf5 Bc8 22. Raf1 Bxf5 23. Rxf5 (23. exf5 {worth trying} e4 $1 (23... Rac8 $2 24. Nxg5 $1 $18 {SF17} Kg7 (24... fxg5 25. f6 $18 Qe6 26. Qh5 Rfd8 27. Qh6 $18 (27. Be4 $18))) 24. Bxe4 cxd3 25. cxd3 Kg7 26. Qf3 Rh8 $1 27. Bxc6 Rac8 28. Be4 (28. Kg2 Rh4 29. Nxg5 Qd6 $19) 28... Qe5 29. Qg2 Kf8 30. a3 Rh4 $17 {Sf17}) 23... c3 (23... Kg7 $19 24. Qg4 Rh8 25. Nf2 Rh4 26. Qf3 Rf4 27. Qg3 Rh8 28. Nh3 Rxf5 29. exf5 Nb4) 24. b3 (24. Qg4 $1 $11 Kh8 (24... cxb2 25. Nxg5 b1=Q+ 26. Kh2 fxg5 27. Rxg5+ Qxg5 28. Qxg5+ {perpetual}) 25. Nxg5 Rg8 26. Qh4+ Kg7 27. Qg4 (27. Nh7 cxb2 28. Rf3 b1=Q+ 29. Kh2 Qe1 $1 30. Qxe1 Qe6 31. Bh3 f5 32. Rg3+ Kh8 33. Bxf5 Rxg3 34. Bxe6 Rg6 35. Bh3 Kxh7 36. Bf5 Rh8 37. Bxg6+ Kxg6+ 38. Kg3 b4 $11 {SF17}) 27... Kh8 28. Qh5+ {repetition}) 24... Kg7 25. Qg4 Rh8 26. Nf2 Rh4 27. Qf3 Rf4 28. Qg3 Rh8 29. Nh3 Rxf5 30. exf5 Nb4 $19 0-1

[Event "Oswestry A v Telepost A"]
[Site "Oswestry"]
[Date "2024.09.19"]
[Round "Board 5"]
[White "Pileggi, Cesar"]
[Black "Slegg, Gary"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "1451"]
[BlackElo "1575"]
[Annotator "Slegg,Gary"]
[PlyCount "80"]
[GameId "2091998211944438"]
[EventDate "2024.?Board ??"]

{[%evp 0,80,25,-10,-14,-36,-29,-26,-20,-17,-19,-17,-15,-13,-11,-15,20,14,11,4,4,0,19,3,6,3,-8,-18,-5,-26,-29,-89,-88,-96,-99,-227,-50,-60,-60,-79,-71,-61,-56,-62,-56,-67,-72,-157,-170,-166,-59,-98,-65,-102,-79,-83,-78,-150,-148,-179,-188,-193,-192,-190,-197,-197,-163,-256,-347,-347,-391,-740,-258,-476,-309,-612,-926,-1001,-1014,-1119,-1006,-1298,-1391] A29: English Opening: Four Knights Variation with 4 g3} 1. c4 e5 2. g3 Bc5 3. Bg2 Nf6 4. Nc3 O-O 5. Nf3 d6 6. O-O Nc6 7. e3 Bf5 (7... Bg4 {main; holdsup d4-vk}) 8. d4 (8. b3 Qd7 9. d4 exd4 10. Nxd4 Bh3 11. Bb2 Bxd4 12. exd4 Rae8 13. Qd3 h5 14. Rfe1 Bxg2 15. Kxg2 h4 16. Ne4 h3+ 17. Kf1 Nxe4 18. Rxe4 Nb4 19. Qe2 Rxe4 20. Qxe4 Re8 21. Qf3 d5 22. Bc3 Nc6 {Tari,A (2584)-Wojtaszek,R (2749) Doha 2016 0-1 (36)}) 8... exd4 {[%eval 61,22]} (8... Bb6 $1 $11 {[%eval 11,21]}) (8... Bb4 9. Bd2 e4 10. Nh4 Bg4 11. Qb3 Qe7 12. d5 Bxc3 13. Bxc3 Ne5 14. h3 Bh5 15. Bxe5 Qxe5 16. Qc2 Rfe8 17. Bh1 b5 18. Rfc1 Qe7 19. cxb5 Rac8 20. a4 Qd7 21. Kh2 Nxd5 22. Bxe4 Nf6 23. Bc6 {Franco Perez,W (1597)-Sepulveda,J Ocana 2019 0-1 (32)}) 9. exd4 $14 Bb6 {White is slightly better.} 10. Bg5 $146 {[%eval 22,23]} (10. a3 $14 {[%eval 65,20]}) (10. d5 Ne7 11. Bg5 Ng6 12. Nd4 Bxd4 13. Qxd4 Ne5 14. Rfe1 h6 15. f4 Ned7 16. Bh4 Re8 17. h3 Rxe1+ 18. Rxe1 Qf8 19. g4 Bh7 20. g5 hxg5 21. fxg5 Ne8 22. Bg3 Nb6 23. b3 Bf5 24. Qf4 g6 {Koivumaki,M (1807)-Lehmann,N (1467) Bad Homburg 2017 ½-½}) (10. Re1 Re8 11. Rxe8+ Qxe8 12. Bf4 Rb8 13. Rc1 Bg4 14. Nb5 Ne7 15. h3 Bd7 16. a4 a6 17. c5 dxc5 18. Nxc7 Bxc7 19. Bxc7 Rc8 20. Rxc5 Bxa4 21. Qe1 Bc6 22. Bd6 Ned5 23. Qxe8+ Rxe8 24. Ne5 Rd8 {Nicolau,D-Carvalho,J Americana 1991 0-1 (60)}) (10. Be3 Nb4 11. a3 Nc2 12. Rc1 Nxe3 13. fxe3 c5 14. b4 cxd4 15. Nxd4 Bg4 16. Qb3 Nh5 17. Ne4 g6 18. c5 Bc7 19. Rc2 d5 20. Nc3 Qg5 21. Nxd5 Rad8 22. Nxc7 Qf6 23. Rxf6 Nxf6 24. Bh3 Bxh3 {Mueller,D (841)-Saar,C Saarlouis Steinrausch 2005 1-0 (51)}) 10... h6 $11 11. Bxf6 Qxf6 12. Nd5 Qd8 13. b4 {[%eval -1,21]} (13. Re1 $14 {[%eval 34,23]}) 13... Be4 14. Nxb6 axb6 15. Qd2 {[%eval -118,21] [#]} (15. b5 $11 {[%eval -7,22]} Na5 16. Rc1) 15... Qf6 $1 $17 16. Qe3 Rfe8 {Black is much more active. The white rooks are badly placed.} 17. Rfd1 $2 {[%eval -330,23]} (17. a3 $17 {[%eval -102,24] is a better defense.}) 17... Bxf3 $2 {[%eval -95,23]} (17... Nxb4 $19 {[%eval -330,23] aiming for ...Nc2.} 18. Qc3 Nc2) 18. Qxf3 Qxf3 ({Weaker is} 18... Nxb4 19. Qxf6 gxf6 20. Bxb7 Rxa2 21. Rxa2 Nxa2 22. Kf1 $11) 19. Bxf3 Nxb4 20. Bxb7 {White is now going downhill.} (20. c5 $1 bxc5 21. dxc5 dxc5 22. Bxb7 Rxa2 23. Rxa2 Nxa2 24. Rd7 Nb4 25. Rxc7 Re1+ 26. Kg2 Rc1 $11 {SF17- is far more active- Wh's R is behind the advavancedpawn, and Bl must keep an eye on stopping the B getting to d5- vk}) 20... Rxa2 21. Rxa2 Nxa2 $19 {[%mdl 4096] Endgame KRB-KRN} 22. Ra1 Nb4 23. Ra8 $2 {[%eval -335,24] when behind in material one should swap pawns as in the note above , not pieces as here- vk} (23. Kf1 $17 {[%eval -116,24] might work better.}) 23... Rxa8 24. Bxa8 {KB-KN} c6 {[%eval -142,25]} (24... Nc2 $19 {[%eval -336,26] has better winning chances.} 25. f4 Nxd4) 25. Bb7 {[%eval -292,28]} (25. Kf1 $17 {[%eval -142,25] keeps fighting.- Kings need to be used actively in all endgames-vk}) 25... g6 {And now ...Kf8 would win.} 26. d5 $2 {[%eval -403,28] this puts another pawn on the same colour as the B, depriving it of mobility. It also allow Bl to obtain a passed, either immediately , or in the longer run-vk} (26. Kf1 {[%eval -196,27]}) 26... c5 {[%eval -180,27]} (26... cxd5 $142 {[%eval -403,28]} 27. cxd5 Na2) 27. Bc6 Nc2 28. Kf1 $2 {[%eval -515,25]} (28. Bb7 {[%eval -184,24] is more resistant.}) 28... Na3 29. Bb5 {[%eval -938,24]} (29. Ke2 $142 {[%eval -495,23]} Nxc4 30. Kd3 Ne5+ 31. Ke2) 29... Nxb5 30. cxb5 {with a protected passed pawn Bl's taskis straigtforward- infiltrate on the K side, sacrifice the outside pawn to draw the K away, then win with pushing a pawn through- vk} Kg7 31. Ke2 Kf6 32. f4 g5 33. Ke3 Kf5 34. fxg5 (34. Kf3 gxf4 35. gxf4 h5 {and Wh will run out of pawn moves, thus forcing the K to reteat-vk}) 34... hxg5 35. h3 Ke5 36. Kf3 Kxd5 {[%eval -1843,25] this is the simplest human move that requires far less calculation than what may be the quickest route as indicated in the Engine line that follows} (36... g4+ $142 {[%eval -32727,26]} 37. hxg4 (37. Kxg4 {requires far more calculation} Ke4 $1 (37... c4 38. Kf3 f5 39. h4 Kd4 40. Ke2 Kxd5 41. h5 Ke6 {also works}) 38. h4 c4 39. h5 c3 40. h6 c2 41. h7 c1=Q 42. h8=Q f5+ 43. Kh5 Qh1+ 44. Kg5 Qxh8 $19 {SF17 -vk}) 37... Kxd5 38. g5 Kd4 39. Ke2 c4 40. Kd2 c3+ 41. Ke2 Ke4 42. g4 Kd4 43. Ke1 Ke3 44. Kd1 Kd3 45. g6 c2+ 46. Kc1 fxg6 47. g5 d5 48. Kb2 Kd2 49. Kb3 c1=Q 50. Ka2 Qc4+ 51. Ka3 Qxb5 52. Ka2 Kc3 53. Ka3 Qb3#) 37. h4 gxh4 38. gxh4 Ke5 {[#] (  ...d5)} 39. Kg4 Kf6 {[%eval -1491,26]} (39... c4 $142 {[%eval -32729,28]} 40. Kf3 f5 41. Kf2 c3 42. Ke2 f4 43. h5 f3+ 44. Ke3 f2 45. Kxf2 c2 46. h6 c1=Q 47. h7 Qc2+ 48. Kf3 Qxh7 49. Kg3 Qe4 50. Kf2 Kf4 51. Kg1 Qe2 52. Kh1 Kf3 53. Kg1 Qg2#) 40. Kh5 c4 {Weighted Error Value: White=1.68/Black=0.91} 0-1

