Author: Tord Romstad
Date: 03:01:05 04/15/05
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On April 14, 2005 at 21:38:41, Mike Byrne wrote: >modified Crafty 19.20 >dual opteron 1.8 Ghz >posted several times before - wonder how the current crop of engines deal with >this problem on more current hardware > > >White(1): [d]1r4r1/3q1npk/2b1pbnp/Rp1p4/1N1P3P/2PQ1pP1/1K3B2/5B1R w - - 0 1 This must be the first time ever that my engine is faster than Crafty, Rebel and The King. Glaurung 0.2.2 on an iMac G5 1.8 GHz announces mate in 15 after 8 seconds and 11 plies: 2 -422 0 143 Nxc6 Qxc6 Qxf3 2 -213 0 338 h5 Bxd4 cxd4 3 -188 1 806 h5 Kh8 hxg6 4 -152 2 3192 h5 Nh8 hxg6+ Nxg6 Nxc6 Qxc6 Qxf3 5 -152 4 5598 h5 Nh8 hxg6+ Nxg6 Nxc6 Qxc6 Qxf3 6 -151 7 10863 h5 Nh8 hxg6+ Nxg6 Nxc6 Qxc6 Ra7 7 -185 40 74190 h5 Ng5 hxg6+ Kh8 Nxc6 Qxc6 Ra7 b4 8 -172 91 183298 h5 Ng5 hxg6+ Kh8 Be3 Ra8 Nxc6 Qxc6 Qxb5 9 -179 230 486408 h5 Ng5 Qxg6+ Kh8 Bd3 Ne4 Be3 Rbc8 Rc1 Qe8 10 -180 531 1199128 h5 Kh8 Qxg6 Ng5 Be3 Qc8 Bxg5 Be8 Qd3 Bxg5 Qxf3 10 -64 636 1450982 Qxg6+ Kxg6 Bd3+ Kh5 g4+ Kxg4 Rg1+ Kh3 Bf1+ Kh2 Bg3+ Kxg1 Ra1 Qa7 Rb1 Qa3+ Kxa3 Ra8+ Kb2 Ra1 Kxa1 Ra8+ Kb2 Ng5 Nxc6 11 +9971 803 1907280 Qxg6+ Kxg6 Bd3+ Kh5 g4+ Kxg4 Rg1+ Kh3 Bf1+ Kh2 Bg3+ Kxg1 Ra1 Qa7 Rb1 Qa3+ Kxa3 Ra8+ Kb2 Ra1 Kxa1 Ra8+ Na2 Rxa2+ Kxa2 Bg5 Bh3+ Bc1 Rxc1# 12 +9971 1000 2496545 Qxg6+ Kxg6 Bd3+ Kh5 g4+ Kxg4 Rg1+ Kh3 Bf1+ Kh2 Bg3+ Kxg1 Ra1 Qa7 Rb1 Qa3+ Kxa3 Ra8+ Kb2 Ra1 Kxa1 Ra8+ Na2 Rxa2+ Kxa2 Bg5 Bh3+ Bc1 Rxc1# 13 +9971 1425 3754195 Qxg6+ Kxg6 Bd3+ Kh5 g4+ Kxg4 Rg1+ Kh3 Bf1+ Kh2 Bg3+ Kxg1 Ra1 Qa7 Rb1 Qa3+ Kxa3 Ra8+ Kb2 Ra1 Kxa1 Ra8+ Na2 Rxa2+ Kxa2 Bg5 Bh3+ Bc1 Rxc1# 14 +9971 2544 7009059 Qxg6+ Kxg6 Bd3+ Kh5 g4+ Kxg4 Rg1+ Kh3 Bf1+ Kh2 Bg3+ Kxg1 Ra1 Qa7 Rb1 Qa3+ Kxa3 Ra8+ Kb2 Ra1 Kxa1 Ra8+ Na2 Rxa2+ Kxa2 Bg5 Bh3+ Bc1 Rxc1# I wonder why Crafty, Rebel and The King have problems with this position. Glaurung does not use any special tricks, except the usual extensions for checks, single-reply-to-checks, mate threats and checks at the first ply of the qsearch. I would expect most programs which use all of these common extensions to find this mate in just a few seconds. Pretty mate, by the way. Which game is it taken from? Tord
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