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Australia672 Posts
sure thing buddy
+ Show Spoiler +a) the a5 knight cannot hang in any tactical lines
b) we don't have an isolani on the a-file
c) we can limit the activity of his rook (it cannot activate itself along the b-file for counterplay)
d) after the moves 17...dxc5 18. dxc5 Qxc5 19. Qxc5 Rxc5 we can now bring a rook to the d-file - which is superior to doubling currently - and start to penetrate rooks into white's position. This is the overriding reason for ...dxc5 over ...bxc5.
hope this helps
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On November 17 2009 19:16 unknown.sam wrote:17...bxc5 + Show Spoiler +
can anyone please tell me why dxc5 and not bxc5?? i'm just following conventional wisdom that says you should capture towards the center when using pawns.
+ Show Spoiler +
B file is currently occuiped with a white rook giving white control of that file, blacks knight is currently gaurded with the B pawn so it would be undefended with bxc. Also it would isolate the a pawn. In a lot of lines, the black night on F7 can go on manuevars to pressuare whites a pawn to death giving black connected passed pawns which would just win the game. Enough reasons?
Those are general guidelines which are good; you can't be blinded by them.
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yeah, i'd have said dxc5 too if I were in this, just because of the rook.
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On November 17 2009 19:48 aseq wrote:
yeah, i'd have said dxc5 too if I were in this, just because of the rook.
Id say the rook is a fairly nominal reason. The biggest reason is having the knight guarded. It can't hang in tactical shots. No reason to throw away won game.
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oh ok now i get it. i did have a hunch it had something to do with his rook but i never thought about the isolated pawn.
thanks for the analysis guys 
time to change my vote haha
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Sanya12364 Posts
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pretty much what everyone else has said:
+ Show Spoiler +
17.......dxc5
18 dxc5 Qxc5
or
18 dxc5 Nd7
19 Ba3 ..whatever
either way black has advantage. let me emphasize about where are we: black's advantage is decent, meaning white playing with no mistakes from here and on and let's say coming up with some weird unexpected !!! can push for a draw at most, but winning for white here is definatly almost impossible. if white makes another blunder, it should be gg in a matter of 4 or 5 moves
so:
absolute must perfect play from white + decent play from black = draw
another blunder from white + decent play from black = 0-1
if black blunders = white can reduce the advantage and increase their drawing chances.
black blunder horribly = white reduces advantage, increase drawing and perhaps winning chances
and for those wondering about other moves.......
from here and on, any other move is only downhill for white . IE:
17....dxc5
18 e5? Nd5
with huge advantage for black
17 .... dxc5
18 d5? exd5
another huge advantage for black
17......dxc5
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the game he lost and accused his opponent of cheating...did he apologize after ragequitting from the tournament?
+ Show Spoiler +
but i was just saying vekzel should start up a new game since he's down material and no real way of generating counterplay. Why keep playing a lost position
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Australia672 Posts
No he didnt. Invititations to events since have been limited for him accordingly.
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motbob
United States12546 Posts
Qxc6
edit: yeah commit suicide, queen!
I meant Qxc5
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Australia672 Posts
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Australia672 Posts
Fun game I played today against my brother. I was black. I out rate him by quite a bit, but still, interesting game, using some nice home prep!
1. d4 d5 2. c4 c6
The Queen's Gambit declined, Slav Variation.
3. Nf3 Nf6 4. Bg5 e6 5. Nc3 h6 6. Bh4 dxc4 7. e4 g5 8. Bg3 b5
The Moscow Variation of the Slav, the alternative was the Botvinnik with an earlier ...g5, but this is slightly less crazy
9. Be2 Bb7 10. h4 g4
The Old Mainline
11. Ne5 h5 12. f3 Nbd7 13. fxg4 hxg4 14. O-O Nxe5? 15. Bxe5 Nd7!!
The Dreev Novelty, and yes, Black will be down a whole Rook
16. Bxh8 Qxh4 17. Bxg4 Qxh8
White returns a piece, leaving black with a pawn and the bishop pair as compensation for the Rook. This was chosen as an alternative to 17. Be5 Nxe5! when white has no defence
18. e5 O-O-O 19. Rxf7 Nxe5 20. Bxe6+ Kb8 21. Rf5 Nd3 22. Qg4 Bg7 23. Ne2 Nxb2 24. Rf7 Bxd4+ 25. Nxd4 Qxd4+
Though down material, Black can trade queens due to the strength of the out posted knight, worth at least a Rook
26. Qxd4 Rxd4 27. Re1 Nd3 28. Re3 a6 29. Bf5 Rd8 30. g4 Bc8 31. Rfe7 Bxf5 32. gxf5 c3 33. Re8 Rxe8 34. Rxe8+ Kc7 35. Re2 Nf4 36. Re1 Nd5
The Knight is very strong now, Blacks pawn majority on the Queenside will be decisive
37. Kf2 Kd6 38. Kf3 Kc5 39. Ke4 Kc4 40. Rf1 c2 41. f6 Nxf6+ 42. Rxf6 c5 43. Rf1 Kc3 44. Kd5 c4 45. Rg1 Kb2 46. a4 c1=Q 47. Rxc1 Kxc1 48. axb5 axb5 49. Kc5 c3 50. Kxb5 c2
51. Resigns 0-1
Let me know what you think
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Sanya12364 Posts
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On November 18 2009 18:24 jfazz wrote:Fun game I played today against my brother. I was black. I out rate him by quite a bit, but still, interesting game, using some nice home prep! 1. d4 d5 2. c4 c6 The Queen's Gambit declined, Slav Variation.3. Nf3 Nf6 4. Bg5 e6 5. Nc3 h6 6. Bh4 dxc4 7. e4 g5 8. Bg3 b5 The Moscow Variation of the Slav, the alternative was the Botvinnik with an earlier ...g5, but this is slightly less crazy9. Be2 Bb7 10. h4 g4 The Old Mainline 11. Ne5 h5 12. f3 Nbd7 13. fxg4 hxg4 14. O-O Nxe5? 15. Bxe5 Nd7!! The Dreev Novelty, and yes, Black will be down a whole Rook 16. Bxh8 Qxh4 17. Bxg4 Qxh8 White returns a piece, leaving black with a pawn and the bishop pair as compensation for the Rook. This was chosen as an alternative to 17. Be5 Nxe5! when white has no defence18. e5 O-O-O 19. Rxf7 Nxe5 20. Bxe6+ Kb8 21. Rf5 Nd3 22. Qg4 Bg7 23. Ne2 Nxb2 24. Rf7 Bxd4+ 25. Nxd4 Qxd4+ T hough down material, Black can trade queens due to the strength of the out posted knight, worth at least a Rook26. Qxd4 Rxd4 27. Re1 Nd3 28. Re3 a6 29. Bf5 Rd8 30. g4 Bc8 31. Rfe7 Bxf5 32. gxf5 c3 33. Re8 Rxe8 34. Rxe8+ Kc7 35. Re2 Nf4 36. Re1 Nd5 The Knight is very strong now, Blacks pawn majority on the Queenside will be decisive37. Kf2 Kd6 38. Kf3 Kc5 39. Ke4 Kc4 40. Rf1 c2 41. f6 Nxf6+ 42. Rxf6 c5 43. Rf1 Kc3 44. Kd5 c4 45. Rg1 Kb2 46. a4 c1=Q 47. Rxc1 Kxc1 48. axb5 axb5 49. Kc5 c3 50. Kxb5 c2 51. Resigns 0-1 Let me know what you think
maybe with 30. Ree7 White can get a Draw?
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EPT
