Author: Drexel,Michael
Date: 12:55:42 08/22/03
Go up one level in this thread
On August 22, 2003 at 15:52:37, Drexel,Michael wrote:
>On August 22, 2003 at 14:59:13, Mike Byrne wrote:
>
>>On August 22, 2003 at 14:50:09, Mike Byrne wrote:
>>
>>>On August 22, 2003 at 14:39:35, José de Jesús García Ruvalcaba wrote:
>>>
>>>>On August 22, 2003 at 09:55:42, Mike Byrne wrote:
>>>>
>>>>>On August 22, 2003 at 09:42:38, Alastair Scott wrote:
>>>>>
>>>>>>[D]8/p2k2p1/1p6/5P1p/P5P1/5K1P/8/8 w - - 0 48
>>>>>>
>>>>>>How long does your engine take to see that gxh5 loses?
>>>>>>
>>>>>>(A surprisingly long time in some cases - for example, 12 seconds for Ruffian
>>>>>>1.0.1, Athlon XP 2600+, 512MB RAM, 32MB hash).
>>>>>>
>>>>>>Alastair
>>>>>
>>>>>show me the win after gh5 , I can't find it ....and neither can crafty or
>>>>>shredder
>>>>
>>>>It is very easy, black puts his king of f6, then creates a passed pawn with a6
>>>>and b5, and the captures all white pawns on the kingside. The only thing white
>>>>can try is to left black with an h-pawn, but that still loses. A posible
>>>>variation
>>>>1. gxh5? Ke7 2. h4 Kf6 3. Ke4 a6 4. h6 gxh6 5. h5 b5 6. axb5 axb5 7. Kd5 Kxf5 8.
>>>>Kc5 Kg5 9. Kxb5 Kg4 10. Kc4 Ke3 and black wins
>>>>White can also try leaving the pawn in h3 or h4, or moving the king first to f4
>>>>instead of e4, but after 1. gxh5? black wins.
>>>>José.
>>>
>>>nice try,but it doesn't work
>>>
>>>
>>>1. gxh5? Ke7 2. Ke4! {h4? does lose} Kf6 3. Kd5 ! and after the pawns on the
>>>Q-side cpme off, it is a draw - Black cannot force a win on the K-side.
>>
>>for example after 3. Kd5 Kxf5? 4.Kc6! wins for white - so black must play 3.
>>...a6! any other move loses for black ...4.Kc6 ensures no outside passer
>>survives and resulting position is a dead draw.
>>
>>[d] 8/6p1/5k2/1K3P1P/8/7P/8/8 b - - 0 6
>>
>>this is a book draw, if black plays Kxf5 - the simplest way to draw is h6!.
>
>Very good explanation.
>
[D] 8/4k1p1/pp6/5P1p/P5P1/5K1P/8/8 w - - 0 1
>
>This position requires even more skills.
>Can white play 1.gxh5 and still draw this position?
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