Author: Christopher A. Morgan
Date: 07:02:59 01/03/03
Go up one level in this thread
While Fritz 8 took 35 minutes to find Qxf6, and could not find the mate after two hours on my Athlon 750, Ruffian found Qxf6 in 1:16 and mate in 15 in 2:34 in 2:11. Very impressive! New game 1r4r1/3q1npk/2b1pbnp/Rp1p4/1N1P3P/2PQ1pP1/1K3B2/5B1R w - - 0 1 Analysis by Ruffian 1.0.1: 1.Qxf3 -+ (-6.13) Depth: 1/1 00:00:00 1.Nxc6 Qxc6 2.Qxf3 -+ (-5.73) Depth: 1/3 00:00:00 1.Nxc6 Qxc6 2.Qxf3 -+ (-5.73) Depth: 2/6 00:00:00 1.h5 Ra8 -+ (-4.05) Depth: 2/8 00:00:00 1.h5 Kh8 2.Qxg6 -+ (-2.50) Depth: 3/12 00:00:00 1.h5 Kh8 2.Nxc6 Qxc6 3.Qxg6 -+ (-2.15) Depth: 4/12 00:00:00 1.h5 Nfh8 2.hxg6+ Nxg6 3.Qxf3 Ra8 4.Nxc6 Qxc6 5.Bxb5 -+ (-2.12) Depth: 5/14 00:00:00 1.h5 Ng5 2.hxg6+ Kh8 3.Kc1 Rgc8 4.Nxc6 Qxc6 5.Kd1 Qxc3 6.Qxc3 Rxc3 7.Bxb5 -+ (-2.71) Depth: 6/16 00:00:00 186kN 1.h5 Ng5 2.hxg6+ Kh8 3.Nxc6 Qxc6 4.Rxb5 Rbc8 5.Kb3 -+ (-2.45) Depth: 7/18 00:00:01 362kN 1.h5 Ng5 2.hxg6+ Kh8 3.Be3 Ra8 4.Rxa8 Rxa8 5.Nxc6 Qxc6 6.Bxg5 Bxg5 7.Qxf3 -+ (-2.24) Depth: 8/22 00:00:03 862kN 1.h5 Ng5 2.hxg6+ Kh8 3.Be3 Rbc8 4.Bxg5 Bxg5 5.Qxf3 Rgf8 6.Qh5 -+ (-2.30) Depth: 9/23 00:00:07 2267kN 1.h5 Ng5 2.hxg6+ Kh8 3.Be3 Rgf8 4.Nxc6 Qxc6 5.Bf4 Rbc8 6.Rxb5 Ne4 7.Qxf3 -+ (-2.48) Depth: 10/28 00:00:20 6827kN 1.h5 Ng5 2.hxg6+ Kh8 3.Be3 Rgf8 4.Nxc6 Qxc6 5.Bf4 Rbc8 6.Rxb5 Ne4 7.Qxf3 -+ (-2.48) Depth: 11/29 00:00:45 16649kN 1.Qxg6+ -+ (-2.13) Depth: 11/32 00:01:16 28407kN 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rb1 Ra1 9.Kxa1 Qa7+ 10.Na2 Qxa2+ 11.Kxa2 Ra8+ 12.Kb3 Ra3+ 13.Kxa3 Be7+ 14.Kb3 -+ (-2.01) Depth: 11/33 00:01:18 29517kN 1.Qxg6+ -+ (-1.66) Depth: 12/34 00:01:24 31726kN 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rb1 Ra1 9.Kxa1 Qa7+ 10.Na2 Qxa2+ 11.Kxa2 Ra8+ 12.Kb2 Ra2+ 13.Kxa2 Bg5 14.Bh3+ Bc1 15.Rxc1# ± (0.91) Depth: 12/34 00:01:38 38335kN 1.Qxg6+ ± (1.26) Depth: 13/37 00:02:11 51255kN 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rb1 Ra1 9.Kxa1 Qa7+ 10.Na2 Qxa2+ 11.Kxa2 Ra8+ 12.Kb2 Ra2+ 13.Kxa2 Bg5 14.Bh3+ Bc1 15.Rxc1# +- (#15) Depth: 13/37 00:02:34 64235kN 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rb1 Ra1 9.Kxa1 Qa7+ 10.Na2 Qxa2+ 11.Kxa2 Ra8+ 12.Kb2 Ra2+ 13.Kxa2 Bg5 14.Bh3+ Bc1 15.Rxc1# +- (#15) Depth: 14/37 00:03:11 84463kN 1.Qxg6+ Kxg6 2.Bd3+ Kh5 3.g4+ Kxg4 4.Rg1+ Kh3 5.Bf1+ Kh2 6.Bg3+ Kxg1 7.Ra1 Ra8 8.Rb1 Ra1 9.Kxa1 Qa7+ 10.Na2 Qxa2+ 11.Kxa2 Ra8+ 12.Kb2 Ra2+ 13.Kxa2 Bg5 14.Bh3+ Bc1 15.Rxc1# +- (#15) Depth: 15/37 00:04:42 134301kN On January 02, 2003 at 17:24:02, Christopher A. Morgan wrote: > >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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