Author: Vincent Lejeune
Date: 11:34:14 04/22/00
Go up one level in this thread
On April 22, 2000 at 14:00:03, Robert Hyatt wrote:
>On April 22, 2000 at 13:39:23, Vincent Lejeune wrote:
>
>>Crafty in fritz interface have a probl with this position :
>>
>>
>>5k2/5n1R/5N1P/p7/8/6K1/r4PP1/8 b - - 0 1
>>
>>Analysis by Crafty 17.10:
>>
>>1. # (#0): 37...Rd2
>>2. -+ (-#1): 37...Ra3+
>>
>>
>>the 2 best moves have a completely wrong evaluation
>
>the 'normal' version has no problem. after a minute on my notebook,
>the eval is -2.52 after 13 plies...
I'm not able to reproduce the error too :/
The error occured 2 times when I was browsing this game (after 36.h7
subvariation) :
[Event "IC FEFB"]
[Site "xxx"]
[Date "2000.04.16"]
[Round "?"]
[White "Thomas, W."]
[Black "Lejeune, V."]
[Result "1-0"]
[ECO "E41"]
[WhiteElo "2012"]
[BlackElo "1860"]
[Annotator "Hiarcs 7.32 (480s)"]
[PlyCount "107"]
[EventDate "2000.04.16"]
1. d4 {E41: Nimzo-Indian: Rubinstein: 4...c5 5 Bd3, including Huebner Variation
} 1... Nf6 2. Nf3 e6 3. c4 Bb4+ 4. Nc3 c5 5. e3 Ne4 6. Qc2 d5 7. Bd3 {
last book move} 7... Qa5 8. Bd2 Nxd2 9. Qxd2 (9. Nxd2 cxd4 10. exd4 Nc6 $14)
9... cxd4 $11 10. exd4 Nc6 11. O-O dxc4 12. Bxc4 Bxc3 (12... O-O 13. a3 Bd6 14.
b4 $14) 13. bxc3 $14 Ne7 (13... O-O 14. Rfe1 $14) 14. Rab1 a6 15. Ne5 f6 16.
Nd3 Nd5 {Exerts pressure on the backward pawn} 17. Rfe1 Qxc3 18. Qxc3 Nxc3 19.
Rb3 (19. Rbc1 $5 Nb5 20. d5 $16) 19... Nb5 $11 20. Bxe6 Bxe6 21. Rxe6+ Kf7 22.
Rb6 Rhd8 23. Rxb7+ Kg8 24. Nf4 Nxd4 25. Rb1 Rd6 26. h4 (26. Nh5 Ne6 $14) 26...
Rad8 $11 27. Ra7 Nb5 28. Re7 Rd1+ 29. Rxd1 Rxd1+ 30. Kh2 Rd4 (30... Nd4) 31.
Kg3 Ra4 $4 {gives the opponent counterplay} (31... g6 $142 $11 {
would keep Black in the game}) 32. Nh5 $18 Rxa2 (32... h6 33. Rxg7+ Kf8 34. Rg6
$18) 33. Rxg7+ Kf8 34. Rxh7 {
The passed pawn on h4 will quickly become a dangerous weapon} 34... Nd6 35.
Nxf6 a5 (35... Nf5+ 36. Kf3 Nd4+ 37. Ke4 Rxf2 38. Nd5 $18) 36. h5 (36. Kf3 {
might be the shorter path} 36... Ra3+ 37. Kf4 Ra2 $18) 36... a4 $2 (36... Nf7
37. h6 a4 38. Nd7+ Ke8 39. f4 Rc2 40. Ne5 Nxe5 41. fxe5) 37. h6 Nf7 38. Nd7+
Ke8 39. Nc5 (39. f4 $142 {and the result of the game is clear: White will win}
39... Re2 40. Ne5 Nxe5 41. fxe5 $18) 39... a3 $16 40. Rg7 Rc2 (40... Nxh6 41.
Ra7 $16) 41. Rg8+ (41. h7 a2 42. Rg8+ Ke7 43. Ra8 Rxc5 44. Rxa2 (44. Ra7+ Kd6
45. Rxa2 Rh5) 44... Rh5 45. Ra7+ Kf6 46. Kg4 Rxh7) 41... Ke7 42. Ne4 a2 43. Ra8
Nxh6 44. Kf4 Nf7 45. Ra6 (45. g4 $5 $16) 45... Nd8 $14 46. g4 (46. f3 $14)
46... Ne6+ (46... Nc6 $142 {and Black hangs on} 47. Nc3 (47. g5 Nb4 48. Ra7+
Kf8 49. g6 Rc6 50. Kg5 Na6 51. Ra8+ Kg7 52. Ra7+) 47... Nb4 48. Ra7+ Kf6 49.
Nxa2 Rxf2+ 50. Ke4 Rxa2 51. Rxa2 Nxa2 52. g5+ Kg6 $11) 47. Ke5 $16 Nd8 48. Ra7+
Kf8 49. Kf6 Re2 $2 (49... Rc6+ $142 50. Kg5 Rc2 $18) 50. f3 $18 Re3 (50... Rb2
51. Ra8 Ke8 52. g5 $18) 51. Ng5 (51. Nd2 $5 {seems even better} 51... Re6+ 52.
Kf5 Re5+ 53. Kf4 Re2 54. Rxa2 Ne6+ 55. Kg3 Nd4 $18) 51... Re2 52. f4 (52. Ra8
$142 Ke8 53. Ne4 $18) 52... Rb2 $4 {
sad, but how else could Black save the game?} (52... Ke8 $142 $18) 53. Ne6+ Kg8
54. Nxd8 (54. Nxd8 Rb6+ 55. Ne6 $18) 1-0
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.