Author: Ernst A. Heinz
Date: 06:50:30 02/17/98
Go up one level in this thread
On February 17, 1998 at 09:13:53, Robert Hyatt wrote: >On February 17, 1998 at 08:46:12, Ernst A. Heinz wrote: > >>WAC #199 >>FEN r1br2k1/pp2nppp/2n5/1B1q4/Q7/4BN2/PP3PPP/2R2RK1 w - - 0 1 >>solutions = Bxc6 Rfd1 >> >>From iteration #10 onward DarkThought sticks with Rcd1 and >>gives it a score of +4.3. What do other programs say? Is Rcd1 >>just a transposition or a new side solution? >> > >I didn't let it run forever, but I get the same (roughly) score for >your move that I get for rfd1 which is the move crafty normally finds >here. I'd like to run it for an hour to be sure however... but they >may well be equivalent, and another cook... DarkThought finds Rfd1 instantly, too, but then switches to Rcd1 in iteration #10. >>WAC #273 >>FEN 2k4B/bpp1qp2/p1b5/7p/1PN1n1p1/2Pr4/P5PP/R3QR1K b - - 0 1 >>solution = Ng3+ >> >>Up to iteration #12 DarkThought prefers the given solution with >>a score of +6.5 but then it switches to g3 with an even higher >>score. What do other programs say? Is g3 a new cook? >> >>***** > >I haven't run this to extreme depths to see if this works or not. >I did try it on Cray Blitz and Crafty: >crafty finds ng3+ instantly, by depth=7, 2 seconds the score is +5.7, by >depth=10, score=+7.25 > >Cray Blitz gets +7.9 at ply=7, 0 seconds. It didn't >change to g3 although I couldn't let it run more than a few seconds >(it gets the DarkThought finds Ng3+ instantly, too, but then switches to g3 in iteration #12. I let both positions above run for 1 hour each on a 500MHz Alpha and DarkThought sticks to its "cooks" with the listed scores while reaching depths of 14-15 plies. =Ernst=
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.