Author: Christophe Theron
Date: 11:04:29 05/25/98
Go up one level in this thread
On May 25, 1998 at 05:56:08, Moritz Berger wrote:
>Here's an interesting 'positional' test position:
>
>1k1r4/pp1bb1p1/1qn1p3/3pPr1p/1P6/P4NPP/4BPK1/R1BQ3R w - - 0 19
>
>The (positional) key move is 19.Bb2!! which leads to a clear advantage
>for white (e.g. 19.Bb2 Rc8 20.Nd4 Nxd4 21.Bxd4). 19.b5 only ensures
>equality, 19.Bf4 (actually played by one program) lets black play
>another beautiful key move: 19...h4!
>
>1k1r4/pp1bb1p1/1qn1p3/3pPr1p/1P3B2/P4NPP/4BPK1/R2Q3R b - - 0 19
>
>
>How long do your programs need to play 19.Bb2 and 19...h4 (after
>19.Bf4)? 19...h4 is of course much easier than 19.Bb2.
>
>
>Please try to let them run a little bit longer on the 19.Bb2 move since
>e.g. Fritz also first choses it after 19" but discards it after 47" in
>favour of another move.
>
>Here are results for Fritz from my P233MMX:
>
>
>19.Bb2
>Fritz 5.01 (98304KB HT): 441" (12 ply)
>
>19...h4
>Fritz 5.01 (98304KB HT): 2"
>
>
>Moritz
Chess Tiger 11.4 does NOT find 19. Bb2 in 2000s (33 min) on my K5-100,
16Mb hash. It would play Be3 instead.
Tiger also prefers 19...g5.
But I'm not sure this position is really a positional test. I don't
really see why 19.Bb2 is such a great move, and 19...g5 seems good too.
Comments welcome...
Christophe
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