Author: James T. Walker
Date: 04:21:06 12/30/00
Go up one level in this thread
On December 30, 2000 at 02:01:49, Uri Blass wrote:
>On December 29, 2000 at 20:50:10, Alexander Kure wrote:
>
>>On December 29, 2000 at 20:28:06, Uri Blass wrote:
>>
>>>On December 29, 2000 at 18:19:58, Alexander Kure wrote:
>>>
>>>>Hi everybody,
>>>>
>>>>In the currently running Wels (Austria) tournament held by Mr. Wiesenecker in
>>>>the game Nimzo 8 vs. SOS an interesting position showed up.
>>>>
>>>>[D]8/8/5kp1/7p/7K/4BP2/8/8 w - - 0 72
>>>>
>>>>In this position Nimzo 8 played 73.f4?? and despite a +10.00 evaluation at moves
>>>>75 and 76 the score immediately dropped to 0 in the following moves!
>>>>
>>>>The following idea would have won easily:
>>>>73.Bb6 Kf5 74.Bc7 Kf6 75.f4 {only now!} Kf5
>>>>76.Be5 {controlling f6} Ke6
>>>>{76...Ke4 77.Kg5 Kf3 78.Kxg6 h4 79.f5 game over}
>>>>77.Kg5 Kf7 78.Bd4 {winning}
>>>
>>>What about 73.f4 Kf5 74.Kg3
>>>
>>>Crafty with part of the 5 piece tablebases(not including the KBP vs KP) failed
>>>high on 74.Kg3 after a few minutes and the score get up every iteration(the
>>>score is +5.96 at the end of iteration 27.
>>>
>>>The idea is 74...Ke4 75.Bb6 Kf5 76.Bd8 Ke4 77.Bc7 Kf5 78.Kh4 Kf6 79.Bb8 Kf5
>>>80.Be5 when black is in zunzwang.
>>>
>>>Uri
>>
>>Hi Uri,
>>
>>This is exactly the winning method i described above, but with a few more moves
>>involved.
>>So Crafty should have avoided 73.f4?
>
>Yes
>Crafty can avoid the move 73.f4 after a few minutes on my pIII450 and see
>another move as +10(Bf4 if I remember correctly).
>
>>74.Kg3 seems to save the game, so maybe 75.Kg5 as played in the game was the
>>decisive mistake?
>
>Probably but it is better if someone with all the 5 piece tablebases will
>analyze it.
>
>Uri
Hello,
On my Athlon 900 Shredder with most 5 piece tablebases finds Bb6 after 4 seconds
with a score of +3.28. Shredder Announces Mt in 23 at ply 24.01 and 24 seconds.
PV: Bb6 Kf5 Bc7 Kf6 f4 Kf5 Be5 Ke4 Kg5 h4 Kxh4 Kf5 Kg3
Jim
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.