Author: Uri Blass
Date: 05:09:54 01/30/05
Go up one level in this thread
On January 30, 2005 at 07:21:15, Duncan Roberts wrote:
>On January 30, 2005 at 06:06:06, Dieter Buerssner wrote:
>
>>On January 28, 2005 at 08:36:45, Duncan Roberts wrote:
>>
>>>rnbqkbnr/pppppppp/8/8/2BPPB2/2NRRN2/PPP2PPP/3Q2K1 w kq - 0 1
>>>
>>>
>>>yace (material only) values the above at about 1.5 and suggests that one can
>>>grab a pawn by move 6 in the above position, although fritz suggest that there
>>>are better moves to be made and values it at about 2.5.
>>
>>Yace shows 1.6, which means exactly 2 pawns (Uri gave the material values to
>>you, where pawn is 80).
>>
>>>is it agreed that black cannot avoid losing a pawn by move 6, and is there
>>>anyway white can get a pawn before move 6 ?
>>
>>Yace material only, does not claim in any way, that "only" at move 6 a pawn can
>>be won. The time, when the 2 pawns are won, do not matter at all for it, as long
>>as they are won inside the search horizont. Possibly one could save material for
>>longer, but will lose more later (all inside the search horizont). To answer the
>>question: "How long can black keep his material together", one would need
>>different algorithms (and a good definition what is "losing a pawn").
>>
>>Regards,
>>Dieter
>
>
>
>
>thanks for the correction.
>
>
>why in a different position, does it say depth = 16 and then show 26 plies
>
>
>depth=16 1/49(Bxf7+) +0.80 . 1.Bxf7+ Kxf7 2.Ne5+ Ke8 3.Qh5+ g6 4.Nxg6 Nf6 5.Qh4
>hxg6 6.Qxh8 Kf7 7.Bg5 Ng8 8.Re3 Nc6 9.Qh7+ Bg7 10.Rf3+ Nf6 11.e5 Nxd4 12.Rxf6+
>exf6 13.exf6 Nxc2 {-270}
>
>
>duncan
extensions(probably check extensions) and qsearch.
If you like no extensions and no qsearch then the result will not be very
intersting(at least with no qsearch).
In the following position it can show +1 at depth 1 with no qsearch because
white can capture a pawn.
r1bqkbnr/pppp1ppp/2n5/4p2Q/4P3/8/PPPP1PPP/RNB1KBNR w KQkq - 0 3
I believe that white will have one pawn advantage in the opening position if you
do no qsearch and search 5,7,9,11,13,15,17,19 plies.
Uri
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