Author: Andrew Dados
Date: 13:02:26 09/26/01
Go up one level in this thread
On September 26, 2001 at 10:20:00, Robert Hyatt wrote: >On September 25, 2001 at 07:01:52, Uri Blass wrote: > >>On September 25, 2001 at 06:58:07, Uri Blass wrote: >> >>>The champion seems to be little goliath >>> >>>It does not want to tell me information at depth 1 but it does not see a forced >>>mate based on it's score and even if it can see 8 queens the positional score is >>>more than 200 pawns. >>> >>>Goliath Light 1.5 - Blass,U >>>8/8/PPPPPPPP/8/8/4K3/8/4k3 w - - 0 1 >>> >>>Analysis by Goliath Light 1.5: >>> >>>1.h7 >>> +- (290.17) Depth: 4/4 00:00:00 >>>1.h7 Kf1 >>> +- (292.17) Depth: 4/4 00:00:00 >>>1.h7 Kf1 >>> +- (292.17) Depth: 4/5 00:00:00 >>> >>>(Blass, Tel-aviv 25.09.2001) >>> >>>Here is another anlaysis by goliath light >>>goliath light claims that it can see mate in 307 but unfortunately does not give >>>the full 613 plies >>> >>>Goliath Light 1.5 - Blass,U >>>8/7P/PPPPPPP1/8/8/4K3/8/5k2 w - - 0 1 >>> >>>Analysis by Goliath Light 1.5: >>> >>>2.h8Q >>> +- (290.17) Depth: 4/4 00:00:00 >>>2.h8Q >>> +- (#6) Depth: 4/4 00:00:00 >>>2.h8Q Kg1 3.g7 >>> +- (292.28) Depth: 4/4 00:00:00 >>>2.g7 >>> +- (#307) Depth: 4/4 00:00:00 >>>2.g7 Ke1 3.h8Q Kd1 >>> +- (#307) Depth: 4/4 00:00:00 >>> >>>(Blass, Tel-aviv 25.09.2001) >>> >>>Uri >>I downloaded another engine and downloaded goliath again. >> >>I give goliath to analyze again the same position >>It can now see mate in 313 with another move and the score improves to mate in >>312 >>Goliath Light 1.5 - Blass,U >>[D]8/7P/PPPPPPP1/8/8/4K3/8/5k2 w - - 0 1 >> >>Analysis by Goliath Light 1.5: >> >>2.h8Q >> +- (290.17) Depth: 4/4 00:00:00 >>2.h8Q Kg2 >> +- (292.17) Depth: 4/4 00:00:00 >>2.d7 >> +- (#313) Depth: 4/4 00:00:00 >>2.d7 Kg2 >> +- (#313) Depth: 4/4 00:00:00 >>2.c7 Kg2 >> +- (#312) Depth: 4/4 00:00:00 >> >>(Blass, Tel-aviv 25.09.2001) >> >>Uri > > >That is broken of course. There are no such mates in the 3-4-5 piece >tablebases. What you see can be explained by scores overlapping 'mating score limit'. Let's say 292 'pawn umits' is internally very close to score which will be interpreted as 'mate in x' score. Hard to fit it all in 16 bits, which is probably the case here.... -Andrew-
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