[Event "Paris"] [Site "Paris FRA"] [Date "1864.??.??"] [Round "?"] [White "Philipp Hirschfeld"] [Black "Ignatz von Kolisch"] [Result "1-0"] [ECO "C59"] [Annotator "sTOCKFISH 17"] [PlyCount "85"] [EventDate "1864.??.??"] {C59: Two Knights Defense} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 {First recorded in the late 16th century, this defense was extensively analyzed in the 19th century. Black allows white to attack f7 when the game quickly takes on a complicated tactical character: The theory was explored extensively in a correspondence game between Yakov Estrin and Hans Berliner.} 4. Ng5 d5 5. exd5 Na5 {This is the Polerio Defense and is still the main line today.} (5... b5 {was played in the famous Yakov Estrin-Hans Berliner ICCF 1965} 6. Bf1 Nd4 7. c3 Nxd5 8. Ne4 Qh4 {Risky play.} 9. Ng3 Bg4 10. f3 e4 11. cxd4 Bd6 12. Bxb5+ Kd8 {White is considerably better, but Berliner went on to win.}) 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nf3 e4 10. Ne5 Qd4 11. f4 Bc5 12. Rf1 Qd6 {This is going to cause black some difficulty in a few moves.} 13. c3 Nb7 (13... Bb6 14. Qa4 Bd7 15. b4 Nb7 16. Na3 O-O 17. Nac4 Qc7 {us equal. Rodriguez Vila,A (2523)-Slipak,S (2489) Villa Martelli 2005}) 14. Qa4 {The opening has been played in a fashion that is acceptable to noth mofern players and engines, but black's next move is too passive. Simply 14...O-O would have been better.} (14. d4 {is equally good.} exd3 15. Qxd3 Qc7 16. Nd2 O-O 17. Ndc4 {equals. Schuetze,N (2317)-Pajeken,W (2351) Bad Woerishofen 2008}) 14... Nd8 15. b4 {[%mdl 32]} Bb6 16. Na3 Be6 17. Nac4 {Better would have been 17.b5!} Bxc4 18. Bxc4 O-O 19. Ba3 {[%mdl 2048] Black is under strong pressure and must now deal with the threat of 10.b5} Nd5 {But this is not the way to do it. `9...Nd7 was correct.} 20. b5 c5 21. g3 Kh7 22. O-O-O f5 23. Qb3 Nf6 24. d4 {[%mdl 32] White has a decisive advantage.} Qc7 {After this complications arise and both sides make some inaccurate moves.} 25. Be6 {This is a mistake that should have allowed black to equalize. Capturing on c5 with either the P or thge B maintains a decisive advantage,} g6 {Black misses his chance, Removing the B with 25...Nxd6 would have equalized.} 26. g4 {Better was 26.dxc5} Nxe6 27. Qxe6 fxg4 {[%mdl 8192] Both sides are unaware that the game should be decided on the Q-side and so are missing the fact that white's winning plan begins with dxc5} 28. f5 g5 {After this white finally hots on the winning move. After 28...Rae8 black would hjave had a fighting chance.} 29. dxc5 {Finally! Now there is no stopping white's onslaught.} Rac8 30. Rd7+ Nxd7 {Now it's mate in 6.} 31. Qg6+ Kh8 32. Qxh6+ Kg8 33. Qxg5+ Kh8 34. Qh5+ Kg7 35. Qxg4+ Kf6 36. Qg6+ {Shorter was 36.Qh4+} Kxe5 37. Qg7+ Rf6 38. Qg3+ Kd5 39. c4+ $1 Kxc4 40. Qb3+ Kd4 41. Rd1+ Ke5 42. Rd5+ Kf4 43. Qg3# 1-0