Author: Christopher A. Morgan
Date: 14:24:02 01/02/03
Go up one level in this thread
For Fritz 8, version 8.0.0.8, on Athlon 750, 96MB hash, after 35 minutes 5 seconds F8 found Qxg6 with depth of 15/45, after switching from h5 which it held from the beginning. It’s now 2hrs and 52 minutes and no mate found. No change in analysis after 2 hours and 2 minutes with depth of 17/51. New game 1r4r1/3q1npk/2b1pbnp/Rp1p4/1N1P3P/2PQ1pP1/1K3B2/5B1R w - - 0 1 Analysis by Fritz 8: 1.h5 Ng5 2.hxg6+ Kh8 3.Qe3 Ra8 4.Nxc6 Qxc6 5.Bxb5 -+ (-1.62) Depth: 7/23 00:00:00 116kN 1.h5 Nfh8 2.Qxf3 Rgf8 3.hxg6+ Nxg6 4.Qg4 Ra8 5.Rxa8 -+ (-1.84) Depth: 8/25 00:00:01 377kN 1.h5 Nfh8 2.Qxf3 Ne7 3.Bd3+ g6 4.Qxf6 Rgf8 5.hxg6+ Nhxg6 6.Qg5 -+ (-1.69) Depth: 9/33 00:00:03 906kN 1.h5 Nfh8 2.hxg6+ Nxg6 3.Qxf3 e5 4.Bh3 Qb7 5.Ra6 e4 -+ (-1.50) Depth: 10/30 00:00:06 1628kN 1.h5 Nd6 2.Qxg6+ Kh8 3.Bd3 Ne4 4.Be3 Rgc8 5.Bxh6 Qc7 6.Bxe4 dxe4 7.Nxc6 Qxc6 8.Bd2 -+ (-1.62) Depth: 11/35 00:00:29 9443kN 1.h5 Nd6 2.Qxg6+ Kh8 3.Bd3 Ne4 4.Rha1 Rgc8 5.Be3 Bb7 6.Bxe4 dxe4 7.Ra7 Ra8 8.g4 -+ (-1.69) Depth: 12/36 00:01:11 23334kN 1.h5 Nd6 2.Qxg6+ Kh8 3.Bd3 Ne4 4.Be3 Bb7 5.Rxb5 Rgc8 6.Bf4 Ra8 7.Rf1 Kg8 8.Rxf3 Rxc3 -+ (-1.69) Depth: 13/38 00:03:18 67369kN 1.h5 Nd6 2.hxg6+ Kh8 3.Qe3 Rgc8 4.Qxf3 Rf8 -+ (-1.69) Depth: 14/43 00:09:26 200375kN 1.h5 Nd6 2.hxg6+ Kh8 3.Qe3 Rgc8 4.Bd3 Bd8 5.Raa1 Nc4+ 6.Bxc4 bxc4 7.Qxf3 -+ (-1.78) Depth: 15/43 00:24:47 543201kN 1.Qxg6+! -+ (-1.75) Depth: 15/45 00:35:05 773347kN 1.Qxg6+! -+ (-1.59) Depth: 15/45 00:36:17 798997kN 1.Qxg6+! ì (-1.28) Depth: 15/45 00:37:11 818224kN 1.Qxg6+! 3 (-0.66) Depth: 15/45 00:38:55 855035kN 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rd1 Ra1 +- (1.59) Depth: 15/51 00:49:54 1087413kN 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rd1 Ra1 9.Rxa1 Qa7 +- (1.59) Depth: 16/47 00:57:41 1258151kN 1.Qxg6+! +- (1.88) Depth: 17/51 01:32:45 2023703kN 1.Qxg6+! +- (2.16) Depth: 17/51 02:02:08 2657933kN On January 02, 2003 at 15:53:44, Drexel,Michael wrote: >On January 02, 2003 at 14:34:13, Dieter Buerssner wrote: > >>On January 02, 2003 at 14:03:42, Manfred Rosenboom wrote: >> >>>Yace needs a while, but from depth 11 on it finds the move. >>>Also in depth 13 Yace announce a mate in 16. This announcement may be wrong, but >>>at least there must be a mate. >> >>Manfred, I think with most chess engines (not mate solvers) mate announcements >>must be interpreted as: It is at least a mate that long, it may be faster. In >>this sense, announcing mate in 16 is not wrong. BTW. Here my current version >>announces mate in 15. But this can also be pure luck, and with a different hash >>table size, it might first find mate in 16, too. >> >>IIRC, the position was discussed here not too long ago. >> >>Regards, >>Dieter > >Hello Dieter, > >Shredder 7 is not able to find the mate at depth 17/50 1026360kN >PV: -+(-3.12) 1.h5 Kh8 2.hxg6 Sg5 3.Le3 Tgf8 4.Ta7 Dxa7 5.Sxc6 Da8 6.Sxb8 Dxb8 >7.Lf4 Da7 >at this depth shredder 7 evaluates 1.h5 (1/44) for minutes and 1.Qxg6+ (3/44) >for roughly two seconds. >at which depth do you think it would find the mate? 30/30? >this 'behaviour' has obviously something to do with its superior playing >strength.
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