Author: Heiner Marxen
Date: 15:33:26 05/06/01
Go up one level in this thread
On May 06, 2001 at 11:55:05, Paul wrote: >On May 06, 2001 at 10:13:27, leonid wrote: > >>On May 06, 2001 at 06:22:26, leonid wrote: >> >>>Hello! >>> >>>If you would like to solve a mate, you can try this moderate position: >>> >>>[D]Qqrkrq1Q/1QqqqqQ1/qBbnnbBq/1NQ2QN1/8/2Q2Q2/3RR3/3K4 w - - >>> >>>Please indicate your result. > >Ok ... my guess, before Heiner moves in with his heavy artillary, a mate in 9: > >06:18 WM9 09 Bxc7+ Qbxc7 Qxc7+ Qxc7 Qxd6+ Qcxd6 Nxe6+ Qexe6 Qfxf6+ Re7 Rxd6+ >Qxd6+ Qxd6+ Bd7 Qhxf8+ Qxf8 Qcc7# Ok, here arrives the artillery: After 4.3 hours on K7/600 with 350 MB hash Chest mutters "No solution in 8 moves." And because of the following timing: depth seconds # 3 0.03 0.96 104- 0 # 4 0.28 1.06 1135- 0 # 5 2.53 1.18 9900- 0 # 6 52.20 1.30 157103- 0 # 7 837.84 1.55 2855222- 699 # 8 15562.53 1.65 49837105- 41089204 15562.53 / 837.84 = 18.574 I will stop here, and not invest another 4.3 * 18.574 = 79.868 hours, or 3.327 days. Ok? We now know, that it is a mate in 9, we are just not sure whether there are more key moves to solve the mate in 9. Aah, and yet again: Pretz found the shortest line, Paul! And Chest did not! Praise to Pretz! Well, that was enough chess problem solving for a weekend. Was fun! :-) A nice next week to all! Heiner
This page took 0.02 seconds to execute
Last modified: Thu, 07 Jul 11 08:48:38 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.