Author: Timothy J. Frohlick
Date: 16:02:39 10/16/03
Go up one level in this thread
Not difficult at all. Shredder 7.04 - 8/3p1p2/5Ppp/K2R2bk/4pPrr/6Pp/4B2P/3N4 w - - 0 1 Analysis by Shredder 7.04: 512 MB RAM on AMD 1500 MHz. 1.gxh4 Kxh4 µ (-0.87) Depth: 1/1 00:00:00 1.gxh4 Kxh4 2.Bxg4 Kxg4 ³ (-0.59) Depth: 1/3 00:00:00 1.Bxg4+ Rxg4 2.fxg5 Rxg5 ² (0.56) Depth: 1/4 00:00:00 1.Bxg4+ Rxg4 2.fxg5 Rxg5 ² (0.66) Depth: 1/6 00:00:00 1.Bxg4+ Rxg4 2.fxg5 Rxg5 ² (0.66) Depth: 2/6 00:00:00 1.gxh4 Kxh4 2.Bxg4 Kxg4 ± (1.05) Depth: 2/6 00:00:00 1.gxh4 d6 2.Bxg4+ Kxg4 3.Rxd6 Bxh4 +- (2.00) Depth: 2/8 00:00:00 1.gxh4 Kxh4 2.Bxg4 Bxf4 +- (4.95) Depth: 2/9 00:00:00 1.gxh4 Kxh4 2.Bxg4 Bxf4 +- (4.95) Depth: 3/9 00:00:00 1.gxh4 Kxh4 2.Bxg4 Bxf6 3.Rxd7 +- (4.32) Depth: 4/9 00:00:00 1.gxh4 Kxh4 2.Bxg4 Bxf4 +- (4.95) Depth: 4/9 00:00:00 1.fxg5 e3 2.gxh4 d6 +- (5.14) Depth: 4/9 00:00:00 1.fxg5 hxg5 2.gxh4 Kxh4 3.Bxg4 Kxg4 +- (5.51) Depth: 4/9 00:00:00 1.fxg5 hxg5 2.gxh4 Kxh4 3.Bxg4 Kxg4 4.Rxd7 +- (5.51) Depth: 4/9 00:00:00 1.fxg5 hxg5 2.Rf5 +- (5.20) Depth: 5/10 00:00:00 1.fxg5 hxg5 2.gxh4 Kxh4 3.Bxg4 Kxg4 4.Rxd7 +- (4.70) Depth: 5/10 00:00:00 1.fxg5 hxg5 2.gxh4 Kxh4 3.Bxg4 Kxg4 4.Rxd7 +- (5.51) Depth: 5/10 00:00:00 1.fxg5 hxg5 2.Rxg5+ Kxg5 3.Ka4 +- (5.26) Depth: 6/12 00:00:00 5kN 1.fxg5 hxg5 2.Rxg5+ Kxg5 3.Ka4 Kxf6 +- (4.76) Depth: 6/12 00:00:00 5kN 1.fxg5 e3 2.gxh4 d6 +- (4.94) Depth: 6/12 00:00:00 6kN 1.Kb4 e3 2.gxh4 Kxh4 3.Bxg4 Kxg4 4.fxg5 +- (4.95) Depth: 6/12 00:00:00 8kN 1.Kb4 d6 2.Kc4 e3 3.gxh4 Kxh4 4.Bxg4 Kxg4 5.fxg5 +- (5.31) Depth: 6/14 00:00:00 9kN 1.Kb4 d6 2.Kc4 e3 3.gxh4 Kxh4 4.Bxg4 Kxg4 5.fxg5 +- (5.31) Depth: 6/14 00:00:00 9kN 1.Kb6 d6 2.fxg5 hxg5 3.gxh4 Kxh4 4.Bxg4 Kxg4 +- (5.49) Depth: 6/14 00:00:00 10kN 1.Kb6 d6 2.fxg5 hxg5 3.gxh4 Kxh4 4.Bxg4 Kxg4 +- (5.49) Depth: 6/14 00:00:00 10kN 1.Kb5 d6 2.fxg5 hxg5 3.gxh4 Kxh4 4.Bxg4 Kxg4 +- (5.80) Depth: 6/14 00:00:00 10kN 1.Kb5 d6 2.fxg5 hxg5 3.Rxg5+ Kxg5 +- (5.80) Depth: 6/14 00:00:00 11kN 1.Ne3 d6 2.fxg5 hxg5 3.gxh4 Kh6 4.Nxg4+ Kh5 +- (8.70) Depth: 6/14 00:00:00 12kN 1.Ne3 d6 2.Bxg4+ Rxg4 3.fxg5 hxg5 4.Rxg5+ Kxg5 +- (8.70) Depth: 6/14 00:00:00 12kN 1.Ne3 d6 2.fxg5 hxg5 3.gxh4 Kxh4 4.Bxg4 +- (9.03) Depth: 7/14 00:00:00 16kN 1.Ne3 d6 2.fxg5 hxg5 3.gxh4 Kxh4 4.Bxg4 +- (9.12) Depth: 7/14 00:00:00 18kN 1.Ne3 d6 2.fxg5 hxg5 3.gxh4 Kxh4 4.Nxg4 Kh5 +- (9.51) Depth: 8/14 00:00:00 53kN 1.Ne3 d6 2.fxg5 hxg5 3.gxh4 Kxh4 4.Nxg4 Kh5 +- (9.51) Depth: 8/14 00:00:00 59kN 1.Nc3 d6 2.Bd1 e3 3.Ne2 Rxg3 4.Nxg3# +- (#4) Depth: 8/16 00:00:00 81kN 1.Nc3 d6 2.Bd1 e3 3.Ne2 Rxg3 4.Nxg3# +- (#4) Depth: 8/16 00:00:00 81kN (Frohlick, Albuquerque 16.10.2003) On October 16, 2003 at 18:50:32, William Kerr wrote: > >Worlds toughest until someone finds a tougher one. > >After timing engines solving many mates in four, this one was by far the >toughest. > >[D] 8/3p1p2/5Ppp/K2R2bk/4pPrr/6Pp/4B2P/3N4 w - - bm Nc3;id #1097 mate in 4 >very-very tough; > >This is a composed mate in 4 problem from Benko's Baffler's #1097. > >Most engines take a very long time to find the mate in 4. > >For PC programs with no CPU speed mentioned were run on a P2 300 Mhz. >Morphy was from the Great Game system 6502 at 2 Mhz. > >m6 = anounced mate in 6 >no solve is usually 10 minutes > >Chessmaster 9000 6:14 m11, 8:51 m6, 9:59 m4 >crafty no solve >pocket fritz < 44 sec >yace < 7 min m11, 26:30 m4 >ruffian 1.0.0 no solve >bringer 15 min no solve >rebel10 17 sec m6, 37 sec m4 >uscf 5 sec >morphy 5:27 >rebel12 no solve 7:00 >ruffian 1.0.1 1:53 m11 >fritz532 3:21 m8 Nc3 >pocket genius 3 min no solve >pocket grandmaster 6 min Ne3 +12.26 12/51 >extreme 2:54 m6 16/34 >doctor3 15 sec m4 >sargon4 5 sec m4 (old PC chess program) >lg2kv2.7 10 min no solve >wkchess 33 sec >yacepdb 30 sec m4 >Novag sapphire ii 1:33 m5 >Novag star diamond 0:55 m5 >Chessmaster 9000 1.7 Ghz AMD 0:42 m11, 0:59 m6, 1:06 m4 > >Post a tougher one than this if you know of one. > >Bill
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