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Subject: THIS IS worlds toughest mate in 4

Author: William Kerr

Date: 14:45:08 10/17/03

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

Re: THIS IS worlds toughest mate in 4 Steven Edwards 03:32:22 10/18/03
Re: THIS IS worlds toughest mate in 4 Tim Foden 01:41:59 10/18/03
Re: THIS IS worlds toughest mate in 4 Steven J. Brann 19:31:46 10/17/03
- Re: THIS IS worlds toughest mate in 4 Lyn Harper 22:48:23 10/17/03
Re: THIS IS worlds toughest mate in 4 leonid 18:58:39 10/17/03
- Re: THIS IS worlds toughest mate in 4 William Kerr 19:28:50 10/17/03
  - Re: THIS IS worlds toughest mate in 4 leonid 07:29:44 10/18/03
    - Re: THIS IS worlds toughest mate in 4 leonid 07:36:10 10/18/03
Re: THIS IS worlds toughest mate in 4 Mike Byrne 17:28:13 10/17/03
Re: TRACE 1.25 P3 600Mhz M4 in 28secs Ross Boyd 17:01:56 10/17/03
Re: THIS IS worlds toughest mate in 4 Peter Fendrich 16:05:13 10/17/03
Re: THIS IS worlds toughest mate in 4 Dieter Buerssner 15:06:51 10/17/03
- Re: THIS IS worlds toughest mate in 4 William Kerr 15:23:52 10/17/03
  - Re: THIS IS worlds toughest mate in 4 Uri Blass 15:27:44 10/17/03
    - Re: THIS IS worlds toughest mate in 4 Sune Fischer 15:48:54 10/17/03
    - Re: THIS IS worlds toughest mate in 4 William Kerr 15:47:38 10/17/03
      - Re: THIS IS worlds toughest mate in 4 William Kerr 16:19:58 10/17/03
        
        Re: THIS IS worlds toughest mate in 4 Mike Byrne 17:30:22 10/17/03
found in 25 seconds, 5800kn/s, single XP 2.5ghz, etc etc :) Aaron Gordon 15:02:21 10/17/03
- Few more engines that do even better. Aaron Gordon 15:16:54 10/17/03

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Last modified: Thu, 15 Apr 21 08:11:13 -0700

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