Author: Reinhard Scharnagl
Date: 08:40:11 02/22/06
Go up one level in this thread
On February 22, 2006 at 10:04:24, h.g.muller wrote: >It might be that the starting position is a very unrepresentative test. Most >pieces don't have any moves at all, rays of sliding pieces always terminate >immediately, they always run into pieces of ther own color, never the opponent. >Most branches become completely predictable because of this, while in reality >they will have a totally random pattern. Even with the perft, where you vary the >position on which the move generator works a little bit, does not change enough >in 6 ply that most of this is no longer true. You should try a perft on a deep >middle-game position, with lots of tactics and open spaces. Following position is recommended: FEN: r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq - 0 25 +-*--b--c--d--*--f--g--*-+ MS Vis.Studio C++ Vers. 13.10 8 |[r]::: :::[k]::: [r]| (Compilation: Feb 13 2006) 7 |[p] [p][p][q][p][b] | 6 |[b][n] :::[p][n][p]:::| Perft Testseries 5 |::: :::<P><N> ::: | 4 | [p] :::<P>::: :::| (without caching) 3 |::: <N> :::<Q>:::[p]| 2 |<P><P><P><B><B><P><P><P>| Smirf Test No.: 01 1 |<R> ::: <K> :::<R>| =>+-*--b--c--d--*--f--g--*-+ Break Time 15.0 Sec. Ply Nodes all (x) (e.p.) all (+) (#) Prom. Cstl. Sec. ------------------------------------------------------------------------------ 1 48 8 0 0 0 0 2 0 2 2039 351 1 3 0 0 91 0 3 97862 17102 45 993 1 0 3162 0 4 4085603 757163 1929 25523 43 15172 128013 0.187 5 193690690 35043416 73365 3309887 30171 8392 4993637 9.515 6 8031647685 1558445089 3577504 92238050 360003 56627920 184513607 392.2 ------------------------------------------------------------------------------ Reinhard.
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.