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#16480 by Juha Hirvonen

12:54, November 07, 2015 by Juha Hirvonen

[Event "?"] [Site "?"] [Date "2015.11.07"] [Round "1"] [White "Yevgeny Levanov"] [Black "Ronen Mash"] [Result "1/2-1/2"] [ECO "C06"] [PlyCount "119"] [SourceDate "2015.11.07"] 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 f6 9. exf6 Nxf6 10. O-O Bd6 11. Nf3 {the very main line of the Tarrasch.} O-O 12. Bf4 {Bg5 is an alternative.} Nxd4 $6 {never seen it in this line. not a good move due to Bxh7+, badly weakening the king.} 13. Bxh7+ $1 (13. Nfxd4 e5 14. Bg3 exd4 15. Nxd4 {equal.}) 13... Kxh7 14. Qxd4 Ne4 15. Bxd6 Qxd6 {white is just long term better. he will blockade on the dark squares and have an easy attack on the king, without facing any counter play.} 16. Ng3 Nf6 {tough choice - many good moves.} 17. Rfe1 {always a good move in the Tarrasch.} (17. Ng5+ Kg8 18. Qd3) (17. Qd3+ Kg8 18. Ng5) (17. Qh4+ $6 Kg8) (17. Ne5) 17... Bd7 18. Qh4+ $6 {not the right way.} Kg8 19. Ne5 (19. Re5) (19. Ng5) (19. Nh5) 19... Be8 20. Rad1 {Rac1!} Rc8 {almost equal already.} 21. Qg5 Nh7 {Rc2 was better.} 22. Qe3 a6 23. h4 Nf6 24. Nf3 Bd7 25. h5 Ng4 $1 26. Qg5 e5 $2 {bad, but creates a total mess.} 27. Nxe5 Qc5 (27... Nxe5 28. Rxe5) 28. Nd3 $6 {just had to play Nxg4, but was in panic.} (28. Nxg4 Bxg4 29. Qxg4 Qxf2+ 30. Kh2 { and that's it.}) (28. Nxd7 $4 Qxf2+ 29. Kh1 Qxg3) 28... Qd4 29. Ne2 {Re7!} Qc4 30. b3 (30. Nef4) 30... Qc7 31. Qxd5+ {not the best here, as the bishop would come to c6.} (31. Nef4 $1) 31... Kh8 32. Ng3 {white is winning, but not so easy.} Bc6 33. Qg5 Qd7 34. Ne5 (34. Nf4) 34... Rxf2 {total shock in time trouble.} 35. Nf3 $4 (35. Nxd7 $4) (35. Rxd7 $4) (35. Ng6+ Kg8 36. Nh4 $1) (35. Nxc6 Qxc6 36. Ne4 $1) 35... Bxf3 36. gxf3 Rxf3 37. Rxd7 $4 (37. Ne4) 37... Rxg3+ 38. Kf1 Nh2+ 39. Kf2 Rxg5 40. Rxb7 Rc2+ $2 (40... Rf8+ $1) 41. Ke3 Rxa2 42. Kf4 Rc5 $4 43. Re8+ Kh7 44. Rbb8 Rf2+ 45. Kg3 Rf3+ 46. Kxh2 Rxh5+ 47. Kg2 Rf6 48. Rh8+ Kg6 49. Rxh5 Kxh5 {theoretical draw.} 50. Rb4 g5 51. Rd4 Rb6 52. Rd3 Rc6 53. Kg3 Re6 54. Rc3 Rd6 55. Re3 Rd5 56. Rc3 a5 57. Re3 Rd4 58. Rc3 Rg4+ 59. Kh3 Rd4 60. Kg3 {draw agreed.} 1/2-1/2

#16477 by JeremyX

07:51, November 07, 2015 by JeremyX

[Site "?"] [Date "2015.11.07"] [Round "-"] [White "JeremyX 1810"] [Black "Wheelermaster 1432"] [Result "1-0"] [WhiteELO "?"] [BlackELO "?"] 1. e2-e4 d7-d6 {Generally a defensive first move, reinforcing the pawn structure but not counterattacking effectively} 2. d2-d4 g7-g6 {This signals black's intention to move his bishop to the long diagonal a1-h8} 3. Ng1-f3 {Protecting the pawn, which is already important because it keeps black's bishop fairly contained after it moves to g7} 3... Bf8-g7 {Bishop to g7 as discussed. Even if the diagonal is blocked, it's a waste to make a space on g7 and not use it.} 4. Bc1-e3 {Reinforcing d4 even more (the pawn on d6 places it under threat, as it will support another pawn's attack)} 4... Bc8-g4 {Following a fairly standard pattern, but...} 5. h2-h3 {If the bishop takes the night I'd gladly capture back with the queen. Black's kingside pawn structure is weak and I want the queen attacking it. Usually, black can retreat with the bishop to h5 and then eventually come around to g6 to get into play, but this is difficult in this case as black has blocked g6} 5... Bg4-d7 {This was the best spot to move the bishop to.} 6. Bf1-d3 {Since I'm castling on the kingside, I didn't want to put my bishop in front of my queenside pawns, since they're going to be free to advance (particularly with black's pawn structure on the kingside). Added bonus of protecting e4, and obviously the point in the first place was to move the bishop to a longer diagonal while making room for the king to castle.} 6... a7-a6 {Slightly restricts my bishop's movement, but also restricts black's knight's movement, so signals an intention to move the knight soon.} 7. O-O {Generally a good idea to castle as soon as possible; otherwise the rook's trapped in the corner} 7... c7-c5 {An attack on d4, as I expected earlier. If I caught c5, black's bishop would be free to move all the way over to b2, capturing a pawn and leaving no escape for the rook.} 8. c2-c3 {This maintains the block on the diagonal, and if black captures d4 another pawn can just replace it and obtain the protections of the bishop and knight. Also makes room for the queen.} 8... f7-f5 {Ruins the pawn structure on the kingside, effectively leaving no safe place for black's king even if it castles once white's pieces have broken through. Also trades a pawn that could attack my king for a useless centre pawn (couldn't advance), and makes room for both light-square bishops, not just the black one it was probably intended for.} 9. e4xf5 {Obviously, I captured it.} 9... Qd8-b6 {Threatening to revisit the 'capture b2 and then the rook can't escape' plan while I'm distracted. It's also reinforcing the attack on d4, but the attack is still not strong enough to win and this move wastes time, allowing me to protect the pawn waiting to be taken on f5} 10. Qd1-c2 {I defended against the immediate threat to b2 while defending the f5 pawn and reinforcing by bishop. With this reinforcement, it is now equal for black to capture my pawn, but if I capture black's pawn on g6 instead I get two in exchange, so black is on the defense here.} 10... e7-e5 {Now potentially giving up the pawn right in front of the king; opens it up to attack, but the idea is to finally win the attack on d4 once I've captured the pawn on g6, so they'd have my pawn by capturing back and the important d4 space under control, as well as a 2nd pawn in return; materially equal and better positionally. It also forces me to not just leave the pawn on f5, which was keeping black's light-square bishop trapped.} 11. f5xe6 {I can't allow that, so I capture e6 en passant instead. This retains control of d4, and there's a checkmate threat to be had (see 12)} 11... Bd7xe6 {The obvious move.} 12. Nf3-g5 {I wanted to capture g6 with my bishop, checking the king and starting a checkmate attack, but it didn't look strong enough, and the queen would have had to leave b2 unprotected to join the attack - if it was unsuccessful, it would mean losing b2 and the rook. (If I'd had a chance to move the knight from b1, the rooks would be protecting each other and I'd only lose the pawn; this is one reason the knights are usually the first pieces to be moved other than pawns). I still want to attack, so I've moved the knight to provide support.} 12... Be6-c4 {Black knows my attack plan, and wants to either stop it (by getting my bishop to capture theirs instead) or take advantage if it fails (because the d3 bishop will move, leaving the f1 rook open to capture).} 13. Bd3xg6+ {The king is checked. The pawn can capture the bishop, but then the queen captures back on g6 and puts the king in check, continuing a strong attack (which at the very least can win back the lost bishop while checking the king, allowing the f1 rook time to escape the c4 bishop and join in the attack)} 13... Ke8-f8 {An interesting choice; this position is easier to block off, but removes the king's ability to 'escape'. This is about keeping a position the opponent can win from if he escapes checkmate, not about escaping checkmate.} 14. Qc2-f5+ {The queen joins in the attack, abandoning the b2 pawn and the rook. I've planned everything out from here, although I made a mistake (see 17)} 14... Ng8-f6 {The direct path to the king is blocked. If I attack with the knight on e6, that means I can't join in with the queen.} 15. b2-b3 {I want more freedom to move pieces on the a2-g8 diagonal without black having the option of trading pieces. Because this is a checkmate attack, I don't have to worry about losing the rook.} 15... Bc4xf1 {Black has no better place to move the bishop.} 16. Qf5-e6 {I'm trying to get the queen to f7, where there are two pieces to help it checkmate the king.} 16... Qb6-c7 {This is the only defense available to black; now he can trade queens if I move my queen to f7.} 17. d4xc5 {Instead of this, I should have moved my bishop to f4. This move had the same idea, but imagined that I had to attack the queen directly, and it allows for...} 17... d6xc5 {The move black should have made: queen to d7. Then I would have used my pawn to capture d6, queens swapped, knight checks king, king moves to g8, and I can either capture the bishop or save my bishop, giving theirs time to get away. Either way, I'd be losing. But black went along with my plan and captured c5 instead.} 18. Be3-f4 {This was the main idea.} 18... Qc7-c6 {The queen could have moved to d7 or e7, but if I move the bishop to d6, there's no avoiding checkmate anyway.} 19. Qe6-f7+ {Checkmate.} 1-0