C48 Four Knights: 4.Bb5, replies other than 4...Bb4 (1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 d6 5.h3 Bd7)

This is from the first round of the 2014 August Banded Quartets I 1700-1800. This tournament was held at Red Hot Pawn. I won my group on round one with a seven point difference to the player who finished second. As only the group winners advanced to the second round, round two was somewhat tougher and I finished fourth in the five player group. In the second round there was only one group, so the winner of that also won the tournament and it was a player called chessicle. I had one good chance to get a winning position in this game, starting on move 31 but instead I made a really bad move. Luckily that move did not lose the game but after that the win was not possible anymore. I have added one mate in one, two mate in twos, one mate in three and one mate in four.

[Event "Banded Quartets"] [Site "http://www.redhotpawn.com"] [Date "2014.08.16"] [Round "1"] [White "VanemGrenberg"] [Black "Vierjoki, Timo"] [Result "1/2-1/2"] [ECO "C48"] [WhiteElo "1518"] [BlackElo "1885"] [Annotator "Tactical Analysis 2.10 (5s), TV"] [PlyCount "80"] [EventDate "2014.??.??"] 1. e4 e5 2. Nf3 Nc6 (2... Nf6 3. Nc3 {1/2-1/2 (59) Budde,R (1598)-Thielemann,J (2073) Doerentrup 2002}) 3. Nc3 (3. Bb5 d6 4. h3 Nf6 {1-0 (45) Van de Meerakker,N-Leber,J Waalwijk 2006}) 3... Nf6 4. Bb5 {C48 Four Knights Game: Spanish Variation} d6 5. h3 Bd7 {0.58/18 C48 Four Knights: 4.Bb5, replies other than 4...Bb4} (5... a6 $11 {0.00/23} 6. Bxc6+ bxc6) 6. O-O {0.13/22} (6. d4 $14 {0.58/18 deserves consideration.}) 6... Be7 {0.78/22} (6... a6 $11 { 0.13/22 keeps the balance.} 7. Bxc6 Bxc6) 7. d3 {-0.13/20} ({Better is} 7. d4 $16 {0.78/22}) 7... O-O {0.64/19} (7... a6 $11 {-0.13/20} 8. Bxc6 Bxc6) (7... h6 8. Re1 O-O 9. Bd2 a6 10. Ba4 b5 11. Bb3 Na5 12. Nd5 Nxb3 13. Nxf6+ Bxf6 14. axb3 c5 15. Ba5 Qc8 16. b4 Re8 17. c3 Bc6 18. bxc5 dxc5 19. Bb6 Bb7 20. Rc1 Re6 21. Ba5 Bd8 22. Bxd8 {Mak,C-Mahadevan,A (1336) Hong Kong 2018 0-1 (48)}) 8. Bg5 {-0.25/24} (8. a3 $14 {0.64/19}) 8... a6 $11 (8... h6 9. Be3 a6 10. Bxc6 Bxc6 11. d4 exd4 12. Nxd4 Bxe4 13. Nxe4 Nxe4 14. Re1 c5 15. Nf5 Nf6 16. Bxh6 gxh6 17. Nxe7+ Kh8 18. Qf3 Nh7 19. Nf5 Qf6 20. Qd5 Rad8 21. Ng3 b5 22. Qc6 Ra8 23. Ne4 {Van de Meerakker,N-Leber,J Waalwijk 2006 1-0 (45)}) 9. Bxc6 $146 {-0.26/21 } (9. Bc4 $14 {0.34/21}) (9. Ba4 b5 10. Bb3 Rb8 11. a3 Qc8 12. Kh2 Be6 13. Bxe6 Qxe6 14. b4 h6 15. Bxf6 Bxf6 16. Nd5 Bd8 17. c3 f5 18. Qe2 Rf7 19. Rad1 Ne7 20. Nxe7+ Bxe7 21. Nd2 d5 22. exd5 Qxd5 23. c4 Qe6 {Budde,R (1598)-Thielemann,J (2073) Doerentrup 2002 1/2-1/2 (59)}) 9... Bxc6 {0.26/22} (9... bxc6 $142 { -0.26/21} 10. d4 exd4 11. Qxd4 h6) 10. Nh2 {-0.51/20} (10. a4 $11 {0.26/22}) 10... Nd7 11. Bxe7 Qxe7 12. f4 {-0.72/21} (12. Qg4 $11 {-0.12/21}) 12... exf4 13. Rxf4 {-1.03/17} (13. Qg4 $15 {-0.55/24}) 13... Ne5 {0.17/20} (13... f5 $1 $17 {-1.03/17} 14. Qe2 (14. exf5 Qe3+) 14... fxe4 15. Rxf8+ Rxf8 16. dxe4 Re8) 14. Qd2 {-0.36/22} (14. Rf2 $11 {0.17/20}) 14... Ng6 {0.43/18} (14... Qg5 $15 { -0.36/22}) 15. Rf2 {-0.13/22} (15. Rf5 $14 {0.43/18}) 15... Qe5 {0.37/19} ( 15... Qd7 $11 {-0.13/22}) 16. Ng4 Qd4 {0.67/19} ({Black should try} 16... Qa5 $11 {0.05/22}) 17. Raf1 {0.16/24} (17. Ne3 $14 {0.67/19}) 17... f5 18. exf5 Rxf5 19. Kh1 Rxf2 20. Qxf2 (20. Rxf2 {is interesting.} b5 21. Qe3 Qxe3 22. Nxe3 a5 23. a3) 20... Qxf2 21. Rxf2 Re8 {[#] And now ...Re1+ would win.} 22. Re2 Rxe2 (22... Rf8 {with more complications.} 23. Kh2 b5 24. a3 Nf4 25. Rf2 h5) 23. Nxe2 $15 {Endgame KBN-KNN} Nh4 24. Ne3 Kf7 25. Kh2 Ng6 26. Kg3 Kf6 27. Nd4 Bd7 28. c3 Ne5 29. Nd5+ Kf7 30. Nxc7 Nxd3 31. b4 Nc1 32. a3 $1 Nd3 33. Nd5 Ne5 34. Nb6 Be6 {0.65/22} (34... g5 $11 {0.00/26}) 35. Nxe6 {0.10/24} ({White should play} 35. Kf4 $14 {0.65/22}) 35... Kxe6 $14 {KN-KN} 36. Kf4 d5 37. g4 Nc6 38. c4 (38. Na4 $5) 38... dxc4 {The position is equal.} 39. Nxc4 Kd5 40. Ne3+ Ke6 {Accuracy: White = 15%, Black = 30%.} 1/2-1/2