[Event "New York"]
[Site "New York USA"]
[Date "2001.??.??"]
[Round "1"]
[White "Nakamura, Hikaru"]
[Black "Yudasin, Leonid"]
[Result "0-1"]
[Annotator "Hathaway, Mark"]
[BlackElo "2568"]
[ECO "A45"]
[WhiteElo "2428"]

1. d4 Nf6 2. Bg5 e6 { This move is more popular than avoiding the pin by ...Nf6-e4. } 3. e4 { The obvious way to exploit the pin on Nf6, though other development moves should also be fine. } 3... c5 ( 3... h6 4. Bxf6 Qxf6 { is perhaps the most common way this is played: Black "forces" White to give his bishop for the knight in order to maintain his central pawns. } ) 4. e5 ( 4. c3 cxd4 5. cxd4 Qa5+ 6. Bd2 ) 4... h6 5. Bc1 Nd5 { The pin is broken, but White's pawns remain. Can Black play around them or force them to be exchanged off? } 6. c4 Nb4 { Black threatens ...c5xd4 when the "natural" response Qd1xd4 fails to Nb4-c2+. } ( 6... Nb6 7. d5 { would be very similar to a variation of Alekhine's Defense. } ) 7. d5 d6 { Black meets White's pawns and forces exchanges before White can bring other pieces up to support them. } 8. a3 N4a6 9. exd6 Bxd6 10. Nc3 O-O 11. Bd3 Nc7 12. Nge2 exd5 13. cxd5 Nd7 14. O-O Nf6 { White has developed quietly, while holding his central pawn. Black got rid of a couple of those White pawns to make it easier for his own pieces to develop. White's advantage is small. } 15. Bc4 b6 16. Ng3 Be5 { Black threatens simply Bxc3 and then to capture Pd5. } 17. Nh5 Bb7 ( 17... Bxc3 18. bxc3 Ncxd5 19. Bxh6 gxh6 20. Bxd5 Nxd5 21. Qxd5 Qxd5 22. Nf6+ Kg7 23. Nxd5 Bb7 ) 18. Bf4 Bxf4 19. Nxf4 Qd6 20. Qf3 { Play centers around the isolated Pd5 as in the Tregubov-Sutovsky game. In this case White's pieces are well placed and Kg1 is perfectly safe. Black's pieces are well developed, but squares e4 and b5 are securely in White's hands, so it's more difficult for Black to counter-attack. } 20... Ne6 { a nifty move regardless of it's efficacy. Black probably planned to plant the knight on d4, but since it threatens Nf4 an exchange is imminent. } 21. Nxe6 fxe6 { This weakens Kg8 a bit, but opens the f-file where Rf8 is aligned with Qf3. Who'd have imagined that alignment could be significant when previously there was a pawn between them? Black also has a threat to capture/win Pd5 with either Pe6 or Nf6. } 22. Rad1 Nxd5 { Already there's a crisis and White must be very careful to avoid immediate loss. } 23. Nxd5 ( 23. Qg4 Rf4 ( 23... Rad8 ) 24. Nxd5 exd5 25. Bxd5+ Bxd5 26. Rxd5 ) 23... Rxf3 24. Nf6+ Rxf6 25. Rxd6 Re8 { Black secures the pawn, but it's awkward. Can White use his better positioned pieces (for aggression) or will Black consolidate his advantage and go on to win? Rf6 is awkward, but seems secure. Re8 is safer at e7, so Rd6-e7 might be a critical test. } 26. Re1 Kf7 27. b4 cxb4 28. axb4 Re7 29. f3 ( 29. b5 Bd5 30. Bxd5 exd5 31. Rxe7+ Kxe7 32. Rxd5 Ke6 33. Rd1 Rf5 34. Rb1 Kd6 $15 35. f3 Kc5 ) 29... Bc8 30. Rc1 Bd7 31. Ra1 Rf4 32. Rxa7 ( 32. Rc1 b5 ) 32... Bc8 { Black's position is solid and White has over-extended trying to poke a hole in the defense, thus leaving his Bc4 & Pb4 indefensible. } ( 32... Rxc4 33. Rdxd7 Rxd7 34. Rxd7+ Kf6 $17 ) 33. Bxe6+ Bxe6 34. Rxe7+ Kxe7 35. Rxb6 { The sparks fly and then there is quiet. Black has the bishop for two pawns. This might be difficult to win. White's Pb4 is weak and must be defended, else White can begin to focus just on the king-side. } 35... Rc4 36. h3 Rc2 37. Ra6 Rb2 38. Rb6 { Here Black must decide on a plan, and it's not so easy to think far ahead. There are several ways White might play his pawns, including just leaving them where they are (to block the Black bishop) . Pb4 is safe for now, so how can Black advance his king (ideally to g3 - probably) ? } 38... Bc4 39. h4 $6 Kf7 40. h5 { This is probably a mistake. It's unlikely White would want to advance g2-g4, so Ph5 appears to be over-extended. } 40... Bd5 41. Rd6 Bc4 42. Rb6 Kg8 43. Rb8+ Kh7 44. Rb6 ( 44. Rb7 ) 44... Bf7 $1 { This forces some kind of concession. } 45. Rb5 Be8 46. Re5 Bc6 47. Rc5 ( 47. Re6 ) 47... Ba4 48. Rc4 Be8 49. Rh4 Kg8 50. Kf1 Rd2 { Black threatens simply Rd2-d5, Be8xh5, so g2-g4 has to be played after all. In this case it's bad for White because g2-g4 will entomb Rh4. } 51. g4 Rb2 52. Rh1 Kf7 53. Rh3 Kf6 54. f4 Rxb4 55. Rf3 Bd7 56. g5+ hxg5 ( 56... Kf5 { is also good because a rook trade leads to a won bishop & pawn ending. Black's bishop can control h1, so that even if he only has a rook pawn he can chase White's king out of the corner. } ) 57. fxg5+ Kxg5 58. Rg3+ Bg4 { Yudasin doesn't even allow the rook trade, ensuring there will be no difficulties of any kind. } 0-1