Author: Mark Young
Date: 17:04:44 05/29/98
Go up one level in this thread
On May 29, 1998 at 05:01:53, Dennis Breuker wrote:
>In http://www.chesscenter.com/twic/michael53.html Michael Greengard
>gives some interesting analysis for the third game in the
>Kramnik-Shirov match.
>
>This is the game in PGN:
>
>[Event "WCC Cand final"]
>[Site "Cazorla ESP"]
>[Date "1998.05.27"]
>[Round "03"]
>[White "Kramnik,V"]
>[Black "Shirov,A"]
>[Result "1/2-1/2"]
>[ECO "D88"]
>[WhiteElo "2790"]
>[BlackElo "2710"]
>
>1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4
>O-O 8. Ne2 c5 9. O-O Nc6 10. Be3 Bg4 11. f3 Na5 12. Bxf7+ Rxf7 13. fxg4
>Rxf1+ 14. Kxf1 cxd4 15. cxd4 e5 16. d5 Nc4 17. Qd3 Nxe3+ 18. Qxe3 Qh4
>19. h3 Bh6 20. Qd3 Rf8+ 21. Kg1 Qf2+ 22. Kh1 Qe3 23. Qxe3 Bxe3 24. Rd1
>Rf2 25. Ng1 Kf7 26. Rd3 Bb6 27. Rf3+ Ke7 28. Rxf2 Bxf2 29. Nf3 Kd6 30.
>g3 Bxg3 31. Kg2 Bf4 32. Kf2 Kc5 33. Ke2 b5 34. Kd3 1/2-1/2
>
>Here I quote the relevant part of what Michael Greengard wrote:
>
>
>------------- <begin quote>
>30.g3 looks like a blunder, tossing a pawn and allowing the bishop to
>protect the weak e-pawn, but upon deeper inspection White has nothing
>else. 30.Ng5 is the obvious move, winning a pawn and, coincidentally,
>almost losing the game! You computer analysis addicts out there should
>toss your Pentium 400 MHz and ChesSpank 6000 out the window on this one
>as I'm sure they just LOVE 30.Ng5! I'm still looking at side lines, but
>it's very hard for White to save the game as the queenside pawns are
>very fast if the knight wanders that far away. (Good thing to remember
>in your own games. Pawns are slow in the middlegame, but are devilishly
>fast in endgames vs. knights!)
>
>While Black is in trouble if he tries to defend (Black loses after
>30.Ng5? 30...h6 or 30...b5 and just barely draws (?) after 30...Ke7), he
>can go on the offensive with 30...Kc5! and it takes some serious
>acrobatics for White to even draw this position.
>
>[ANALYSIS LINE: 30.Ng5?]
>
>30...Kc5! 31.Nxh7 b5 32.g3 a5
>
>(32...Bxg3? Slowing down the queenside pawns by a crucial tempo and
>allowing the white king to gain several important tempi hitting the
>bishop. 33.Nf8 a5 34.Kg2 Be1 35.Nxg6 Kd6 36.Kf1! Bc3 37.h4 b4 38.Ke2
>winning)
>
>33.Kg2 Bd4 34.Ng5
>
>(This crazy line which appears to save White is probably better! Lots of
>analysis needed here: 34.h4 b4 35.h5 gxh5
Fritz 5 found another interesting line here. It agreed with the above
excecpt for 34.-- b4 which I forced. As it seemed best. From a computers
point of view I can see nothing wrong with playing 30 Ng5. It is at
least as easy a draw for a computer as g3 is for a human. With the add
effect of 30. Ng5 may have winning chances. I could not find any danger
for white after playing this line.
36. g5 {1.09/15 99} 36... a4 {
1.19/15 76} 37. g6 {1.13/15 112} 37... b3 {1.19/14 90} 38. axb3 {1.25/14
145}
38... axb3 {1.34/14 76} 39. g7 {1.28/14 153} 39... b2 {1.28/13 108} 40.
g8=Q {
1.28/12 110} 40... b1=Q {1.44/11 24} 41. Qf8+ {1.53/12 96} 41... Kc4 {
1.53/13 126} 42. Qf3 {1.59/12 113} 42... Qg1+ {1.66/12 134} 43. Kh3
{1.06/1 0}
43... Bf2 {1.72/12 80} 44. Ng5 {1.56/12 130} 44... Kb5 {1.69/12 152} 45.
Qg2 {
1.94/12 142} 45... Qd1 {1.94/13 90} 46. Nf3 {1.97/13 131} 46... Bd4 {
2.25/13 166} 47. Kh4 {2.28/13 210} 47... Kc4 {2.31/12 154} 48. Kxh5 {
2.16/13 226} *
>36.gxh5 a4 37.Nf6 Be3 38.d6
>Bg5 39.Ng4 b3 40.axb3 a3 41.Ne3 Bxe3 42.d7 Bg5 43.h6 a2 44.h7 a1Q 45.h8Q
>Qd4 46.Qf8+ Kb6 47.Qb8+ Kc6 48.Qc8+ Kb5 49.Qb7+ Kc5 50.Qc7+ Kb4 51.Qc4+
>Qxc4 (51...Ka3!? 52.Qd5! = (?)) 52.bxc4 Kxc4 = 53.Kf3 Bd8 54.Kg4 Kc5
>55.Kf5 Kd6 56.g4 Bc7 57.Kf6 Kxd7 58.g5 Ke8 59.Kg7 Bd8 60.g6 Bh4 61.Kh7
>Bf6 62.g7 Bxg7 63.Kxg7 Ke7 64.Kg6 Ke6 65.Kg5 Ke7 66.Kf5 Kf7 67.Kxe5 Ke7
>68.Kf5 Kf7 69.e5 Ke7 70.e6 Ke8 71.Kf6 Kf8 72.e7+ Ke8 73.Ke6 stalemate)
>
>34...b4 35.h4 a4 36.h5 gxh5 37.gxh5 b3 38.axb3 axb3 39.Nf3?!
>
>(39.h6! b2 40.h7 b1Q 42.h8Q Black wins the knight, but White may have a
>perpetual check in here. Qg1+ 43.Kf3 Qd1+ 43.Kg2 Qd2+ 44.Kf3 Qxg5 and
>the checking begins. Can White draw?)
>
>39...Be3 40.Ne1 (40.Nxe5 Kd4 41.d6 Kxe5 42.d7 Bb6 Black wins) 40...Kc4
>41.h6 Bxh6 42.d6 Bg5 43.Nf3 b2 44.d7 b1Q 45.d8Q Qc2+ 46.Nd2+ Qxd2+
>47.Qxd2 Bxd2 48.Kf2 Kd3 49.Kf3 Be3 Black wins.
>
>Whew! This is just one night's reflection, a lot of work still needs to
>be done in some lines. But it's enough to see that Kramnik's 30.g3 was
>the best choice! After 30...Bxg3 it’s a clear draw. (31.Ng5 now doesn't
>work: 31...h6 32.Nf7+ Ke7 33.Nxh6 Bf4!)
>
>So it's Shirov to serve again, let's hope for an ace.
>------------- <end quote>
>
>
>Since he is convinced that no computer will see that 30. Ng5 is wrong
>(is it?), I am very curious what computers will play in the position
>after Black's 29th move. And maybe some computers can check his
>analysis?
>
>Dennis.
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