Author: Heiner Marxen
Date: 11:47:32 05/16/99
Go up one level in this thread
On May 14, 1999 at 23:41:38, William Kerr wrote: >Here is a position I composed with the purpose of having each color piece >attacking a piece of the opposite color. Intent was to have as many attacks >and counter attacks as possible. Also added many pawn qweening possibilities >just for good measure. Hope you never play into this position: > > 8/PPPPPpPk/3rq3/1b1r2b1/2BR1B2/3RQ3/pppppPpK/8 w > >Challange: Try to compose a position that has as many attacks and counter- >attacks for each piece for each side as possible along with pawn promotions. >You should end up with a very tough position that takes your chess program a >long time just to grind through a few plys. Post your position for others to >try. > >CM6K on a PII 300 takes a long time with the above nightmare position just to do >a 4 ply search: >0:00 1/2 13.33 g7g8Q+ >0:24 1/3 10.69 g7g8Q+ >6:04 1/4 8.49 g7g8Q+ OTOH, for a chess problem solver this is not that hard. On this position mine comes up after 144 secs with "no mate in 8 moves" on a not that fast hardware, what I consider rather fast. That is comparable to an 8-ply search without extensions and without q-search. I guess the missing q-search is the main reason for the difference in depth. If you are interested in computationally hard positions, you should have a look at Valentin Albillos pages: http://www.multimania.com/albillo/cmain.htm Thanks anyhow, for the "nightmare" position.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.