Author: Peter Fendrich
Date: 16:05:13 10/17/03
Go up one level in this thread
On October 17, 2003 at 17:45:08, William Kerr wrote: >Hi > >I posted the worlds toughest mate in 4 yesterday but I included the wrong epd >string. That was a tough mate in 4 but this one is far far tougher for some >engines. Its probably a null move issue for some engines. > >[D] 5R2/2K5/1pP5/4k2p/3pp3/2p4N/B4N1b/n1R1B2b w - - id BB #1217 mate in 4; > > > >Again this is from Benko's Bafflers from Chess Life magizine. > >Chessmaster 9000 AMD 1.7Ghz 2 sec m4 >pocketFritz 1.0 17 min m16 >GGM Capa module 43 min 25 sec >Crafty 19.3 AMD 1.7Gh 44 min m5 >ruffian 1.0.1 P2 300 mhz 40 sec >star diamond 1 hr & 50 sec m5 >star diamond mate in 4 level 17 sec >yacePdb P2 300 mhz 4 min m6, 5 min m4 >fritz532 8 sec m6, 14 sec m4 >lg2000v27 greater than 10 min less than 18 min >bringer 5 min m9 >waxman 1:08 m4 P2 300 mhz > >Have fun with this one. > >Bill A nice Nullmove killer. It takes Terra 13 minutes to find the mate with Nullmove on but only 5 seconds with Nullmove off. Terra with Nullmove off: Terra 3.3B1 UCI 150 MB: D3 00:01 10,50 1.Bxc3 D3 00:01 11,93 1.Bxc3 dxc3 2.Rxh1 e3 3.Kxb6 D4 00:01 11,93 1.Bxc3 D4 00:01 11,42 1.Bxc3 dxc3 2.Nxh1 Kd4+ 3.Kxb6 Bd6 D5 00:01 11,42 1.Bxc3 D5 00:01 13,10 1.Bxc3 dxc3 2.Nxh1 Kd4+ 3.Kd7 Nc2 4.Rxc2 D5 00:01 13,28 1.Nxh1 b5 2.Bxc3 dxc3 3.Rxa1 b4 D6 00:01 12,89 1.Nxh1 Nb3 2.Rxc3 dxc3 3.Bxb3 Kd4+ 4.Kxb6 e3 D6 00:01 13,50 1.Bxc3 D6 00:02 13,52 1.Bxc3 dxc3 2.Nxh1 b5 3.Kb7 D7 00:04 14,12 1.Rxc3 D7 00:05 M4 1.Rxc3 Bf3 2.Re3 Nb3 3.Bxb3 dxe3 4.Bc3+ Terra with Nullmove on: Terra 3.3B1 UCI 150 MB: D3 00:01 10,50 1.Bxc3 D3 00:01 11,93 1.Bxc3 dxc3 2.Rxh1 e3 3.Kxb6 D4 00:01 11,93 1.Bxc3 D4 00:01 11,42 1.Bxc3 dxc3 2.Nxh1 Kd4+ 3.Kxb6 Bd6 D5 00:01 11,42 1.Bxc3 D5 00:01 13,10 1.Bxc3 dxc3 2.Nxh1 Kd4+ 3.Kd7 Nc2 4.Rxc2 D6 00:01 13,52 1.Bxc3 dxc3 2.Nxh1 b5 3.Kb7 Kd6 4.Rxa1 D7 00:01 13,64 1.Bxc3 dxc3 2.Rxh1 Bg3 3.Rxa1 b5 4.Nh1 Bh4 D7 00:03 14,25 1.Nxh1 D7 00:03 15,34 1.Nxh1 e3 2.Kxb6 Ke4 3.Bxc3 dxc3 4.Ng5+ Ke5 5.Rxa1 D8 00:03 15,34 1.Nxh1 D8 00:06 17,52 1.Nxh1 Nb3 2.Bxb3 h4 3.Kxb6 Bf4 4.Nxf4 Kd6 5.Bxh4 D9 00:09 16,17 1.Nxh1 D9 00:18 20,12 1.Nxh1 Nb3 2.Bxb3 h4 3.Kxb6 Bg1 4.Nxg1 e3 5.Bxc3 dxc3 6.Rxc3 D10 00:29 20,12 1.Nxh1 D10 02:43 21,10 1.Nxh1 Nb3 2.Kxb6 Na5 3.Ng3 Kd6 4.c7 Nb3 5.c8Q e3 6.Bxb3 D10 08:32 22,08 1.Rxa1 D10 10:04 22,69 1.Rxc3 D10 13:38 M4 1.Rxc3 Bf4 2.Nxf4 Nb3 3.Ng6+ Ke6 4.Bxb3+ /Peter
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