D16 Slav Defence: 5.a4: Lines with 5...Bg4 and 5...Na6 (1.d4 d5 2.c4 Nf6 3.Nc3 c6 4.Nf3 dxc4 5.a4)

This was played in a team match called Open Challenge ✮HIGH POWER✮. It was a match played on 12 boards between ✮HIGH POWER✮ and DORU-66 & HIS BEST FRIENDS. I played on board 3 in this match for DORU-66 6 HIS BEST FRIENDS and I ended up winning both of my games on time. The match ended 6,5 - 17,5 in favor of DORU-66 & HIS BEST FRIENDS. Even if my opponent had not lost on time, I think I could have won this regardless. There were positions in this game that were quite difficult for me to play and I thought that one mistake could cost me the win. I had to be very careful not to let that happen. This was certainly more hard fought game than my other game with honnyqueen because there she lost on time during the opening phase of the game. I have added one mate in two, three mate in threes and one tactic puzzle. Until tomorrow, my fellow chess enthusiasts!

This post was previously named D16 Slav Defense: Alapin Variation and it was changed to its current name on August 16th, 2019.

[Event "Open Challenge ✮HIGH POWER✮ - Board"] [Site "Chess.com"] [Date "2015.01.21"] [Round "?"] [White "Vierjoki, Timo"] [Black "honnyqueen"] [Result "1-0"] [ECO "D16"] [WhiteElo "1928"] [BlackElo "1815"] [Annotator "Tactical Analysis 2.10 (5s), TV"] [PlyCount "105"] [EventDate "2015.??.??"] 1. d4 (1. Nf3 d5 2. d4 Nf6 3. c4 {1/2-1/2 (44) Winkelsett,C (1600)-Hartmann,V (1652) Germany 2018}) 1... d5 2. c4 Nf6 (2... c6 3. Nf3 Nf6 {1-0 (43) Van den Berg,D (2028)-Braggaar,P (1987) Leiden 2013}) (2... dxc4 3. Nf3 Nf6 4. Nc3 { 1-0 (26) Le Roch,D (1948)-Brochet,P (2388) Cannes 2005}) 3. Nc3 c6 4. Nf3 dxc4 5. a4 {D16 Slav Defence: 5.a4: Lines with 5...Bg4 and 5...Na6 D16 Slav Defense: Alapin Variation} h6 {0.98/18} (5... Bf5 $11 {0.08/23 keeps the balance.}) 6. e4 $16 (6. e3 Be6 7. Be2 a6 8. O-O Nbd7 9. h3 b5 10. axb5 cxb5 11. e4 Nb6 12. d5 Bd7 13. e5 Nh7 14. Be3 Qb8 15. Bc5 e6 16. Qd4 Bxc5 17. Qxc5 Nxd5 18. Nxd5 exd5 19. Qxd5 Qc8 20. Rfd1 Qc6 {Winkelsett,C (1600)-Hartmann,V (1652) Germany 2018 1/2-1/2 (44)}) 6... e6 $146 {1.40/18} (6... Bg4 $142 {0.91/22} 7. Bxc4 e6 8. Qb3 (8. Be3 Qa5 9. O-O Be7 10. h3 Bxf3 11. Qxf3 O-O 12. e5 Nh7 13. Qg4 Kh8 14. Ne4 Qd8 15. Rad1 Nd7 16. Bd3 Rg8 17. Qh5 Qe8 18. Qg4 Ndf8 19. f4 f5 20. exf6 Nxf6 21. Nxf6 Bxf6 22. Rf3 Rd8 {Kebe,M (1792)-Ulaga,K (1775) Okroglo 2004 1/2-1/2}) 8... Qb6 9. Ne5 Qxb3 10. Bxb3 Bh5 11. f3 Nfd7 12. Nd3 Be7 13. Nf4 Bg6 14. Nxg6 fxg6 15. Bxe6 Na6 16. Bf4 Nf6 17. h3 Nb4 18. O-O g5 19. Bh2 Nh5 20. Rad1 Nf4 21. Bc4 Rd8 {Van den Berg,D (2028)-Braggaar,P (1987) Leiden 2013 1-0 (43)}) (6... Be6 7. Be2 Na6 8. O-O Qa5 9. Bf4 Rd8 10. Qd2 g5 11. Be5 Bg7 12. Rfd1 g4 13. Nh4 Nc5 14. Qc2 Ncd7 15. Bf4 Nb6 16. Nf5 Bxf5 17. exf5 O-O 18. Be5 h5 19. Qd2 Nbd7 20. Qf4 Nd5 21. Nxd5 {Le Roch,D (1948)-Brochet,P (2388) Cannes 2005 1-0}) 7. Bxc4 Bb4 {1.85/18} (7... Na6 $16 {1.31/21}) 8. Qe2 {1.20/22} (8. O-O $18 {1.85/18}) 8... Qa5 {1.85/16} (8... c5 $16 {1.20/22}) 9. Bd2 {1.22/22} ({Better is} 9. O-O $18 {1.85/16}) 9... Nbd7 10. O-O O-O {2.06/18} (10... e5 $16 {1.25/24 keeps fighting.}) 11. Rfd1 $2 {0.06/20 [#]} (11. e5 $18 {2.06/18}) 11... Nb6 $2 {2.78/18} (11... e5 $1 $11 {0.06/20}) 12. Bb3 Bd7 {3.08/18} (12... Qa6 {2.16/21 was called for.} 13. a5 Qxe2 14. Nxe2 Bxd2) 13. Qd3 {1.73/23} (13. Ne5 $142 {3.08/18}) 13... Qh5 $2 {4.09/19} (13... Be8 {1.73/23} 14. e5 Nfd5) 14. Bc2 $18 Rfd8 15. e5 Ng4 16. h3 f5 17. hxg4 Qxg4 18. Ne2 Nd5 19. Bb3 Be7 { 7.24/20} (19... Qe4 $142 {4.28/23} 20. Qxe4 fxe4 21. Bxd5 cxd5 22. Bxb4 exf3 23. gxf3 Rdc8) 20. Bxd5 cxd5 21. Rdc1 Rac8 {5.58/22} (21... Qe4 $142 {3.79/23} 22. Ne1 Rdc8) 22. b3 h5 $2 {7.12/21} (22... Qg6 {3.62/24} 23. Ba5 Rxc1+ 24. Rxc1 Rc8 25. Rxc8+ Bxc8) 23. Qe3 h4 24. Qf4 Qh5 25. Rxc8 Rxc8 26. Rc1 Bc6 27. b4 a6 28. b5 axb5 29. axb5 Bd7 30. Rxc8+ Bxc8 31. Qe3 Qe8 32. Qb3 b6 33. Bg5 Bxg5 34. Nxg5 Qh5 35. Nf3 h3 36. Nf4 Qh6 37. Nxh3 Bd7 38. Nhg5 Qg6 39. Qa4 Qe8 40. Qa6 Qb8 41. Nd2 Kf8 42. Nb1 Qc7 43. Qa8+ Ke7 44. Qa3+ Ke8 45. Nc3 Qc4 46. Nf3 g5 47. Nxg5 Qxd4 48. Nh7 {15.50/28} (48. Qa8+ $142 {#17/27} Ke7 49. Nh7 Bc8 50. Qxc8 Qxe5 51. Qf8+ Kd7 52. Nf6+ Qxf6 53. Qxf6) 48... Kd8 49. Qa8+ Bc8 50. Qc6 {[#] White threatens Qd6+ and mate.} Qxe5 51. Qxb6+ Ke8 {15.96/22} (51... Qc7 $142 {4.75/24} 52. Na4 Qxb6 53. Nxb6 Bb7) 52. Qc5 Qg7 53. Qxc8+ {Accuracy: White = 53%, Black = 19%.} 1-0