Author: Miguel A. Ballicora
Date: 09:20:18 05/24/01
Go up one level in this thread
On May 24, 2001 at 06:49:09, Ferdinand S. Mosca wrote:
>On May 24, 2001 at 05:14:07, Miguel A. Ballicora wrote:
>
>>On May 24, 2001 at 05:06:48, Miguel A. Ballicora wrote:
>>
>>>epd record is
>>>5rk1/1pp3p1/p1p5/7p/6P1/4b3/PPP2RPP/5RK1 b - - bm h4;
>>>
>>>[D]5rk1/1pp3p1/p1p5/7p/6P1/4b3/PPP2RPP/5RK1 b - -
>>>It is a modified version of a position from real tournament play that
>>>I saw in www.inforchess.com. I modified so a program won't find the solution
>>>for the wrong reasons. I tested crafty and could not find the solution
>>>even after 17 plies. I did not continue further.
>>>Is there any program that find the solution in a reasonable time?
>>>This is very easy for humans, I find the solution myself instantanously
>>>and took me few seconds to verify it. The original position is without the
>>>white pawn in g4.
>
>>>
>>>Regards,
>>>Miguel
>>
>>Of course, the solution is h4 and white is paralyzed.
>>
>>Miguel
>
>
>Very difficult indeed, Yace and Chezzz like 1...hxg4 and could not see 1...h4!!
>if then 2. g3 h3!, could this be a good test for pin and king mobility perhaps.
>Black has to see that a pawn on h3 is paralyzing for white.
This position also involved a long term zugswang. Once white is paralyzed
it should move the pawns in the q side until it runs up of moves or black
captures them all.
I have an idea about making the test even more difficult for computers, where
there is paralysis but no zugswang. But firs, there should be a program
able to solve this "easy" problem...
Regards,
Miguel
>Kasparov in one of his own game analysis told that a pawn on h3 by black with
>white on g3/h2 is generally advantageous.
>
>
>//Yace
>108345275 8:49.2 0.65 16t 1...hxg4 2.g3 b5 3.Kg2 Bxf2 4.Rxf2 Rd8 5.c3 Kh7
> 6.Rf7 {HT} {80}
>
>
>//Chezzz
>221.70 15/24 +0.89 0... hxg4 1. g3 Rf6 2. Kg2 Bxf2 3. Rxf2 Kf7
> 4. Re2 g6 5. c3 g5 6. c4 Rd6
> 7. Kf2 Kf6 (28322 kN)
>
>//Dinan
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