Author: Uri Blass
Date: 22:45:00 12/05/02
Go up one level in this thread
On December 05, 2002 at 21:27:58, Dave Gomboc wrote: >Recently I've been looking at a few positions which take (a slightly modified) >Crafty 19.1 a large number of nodes before it can complete a depth-1 search. I >am wondering what the node counts are for other programs, and specifically if >Crafty's node counts are normal enough or an outlier. > >Yes, I realize that "depth 1" is defined differently by different engines. > > >Here are some positions: > >[D] 1r3rk1/3qn1bp/p1np2p1/1ppNpp2/2P2P2/1PNPP1P1/PB4QP/1R3RK1 w - - > >mod-crafty-19.1: 61990 nodes 720 nodes Nxe7+ at depth 1 Movei changes it's mind sometimes but again prefers Nxe7 at depthes 10,11 > >[D] 1rb2rk1/1pq3bp/1Np1n3/p1Pp1p1n/1P1Np3/P2PP1P1/1BQ3BP/R4RK1 w - - > >mod-crafty-19.1: 196561 nodes 2082 nodes dxe4 at depth 1 but nxf5 is prefered later at depthes 10,11. > >[D] r4rk1/2q1bppp/2bp2n1/1p1Bp3/1BnPP3/2P1NN2/5PPP/R2Q1RK1 w - - > >mod-crafty-19.1: 48246 nodes 1142 nodes Movei has a stable opinion to play Rxa8 > >[D] 3qrrk1/pb5p/1p1p2p1/2p1pp2/1PPbPPn1/P2P2P1/1BQ3BP/1R1N1R1K w - - > >mod-crafty-19.1: 46489 nodes 199 nodes Bxd4(later movei changes it's mind to h3) Note that the fact that movei does not count null move has no influence because movei does not do null moves when the remaining depth is 1 and has other ways to decide if to prune. In the opening positions is has 20 nodes at depth 1. Uri
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.