Author: Reinhard Scharnagl
Date: 00:17:20 10/18/04
Go up one level in this thread
On October 17, 2004 at 22:58:35, William Bryant wrote: >I am reaching for straws here, but, knowing the experience on this board, >someone might have had this problem too. > >My move generator comes up short of perft. >Specifically, from the starting position it is 20 move short on perft 3. > >I get 20 at ply 1 >I get 400 at ply 2 (20 responses) >But I only get 8882 at ply 3 (reguardless of wether black starts first or white) > >I have checked all the special move, double pawn moves, ep moves, castling and >can't seem to find >the error. > >Any suggestions. > >William >(BTW, this is a new engine for me, 64 bits wide for my new (hopefully) G5)) Try to have a more detailed statistic. You could specify the type of wrong handled moves easier. Here is the way my Smirf creates results (P4 2.8 GHz): FEN: rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1 +-*--b--c--d--*--f--g--*-+ MS Vis. Studio C++ Vers. 13.10 8 |[r][n][b][q][k][b][n][r]| 7 |[p][p][p][p][p][p][p][p]| Perft Testseries 6 | ::: ::: ::: :::| 5 |::: ::: ::: ::: | (without caching) 4 | ::: ::: ::: :::| 3 |::: ::: ::: ::: | Test #: 00 2 |<P><P><P><P><P><P><P><P>| 1 |<R><N><B><Q><K><B><N><R>| Break Time 75.0 Sec. =>+-*--b--c--d--*--f--g--*-+ Ply Nodes all (x) (e.p.) all (+) (#) Promot. Castl. Sec. ------------------------------------------------------------------------------- 01 20 0 0 0 0 0 0 0 02 400 0 0 0 0 0 0 0 03 8902 34 0 12 0 0 0 0 04 197281 1576 0 469 8 0 0 0 05 4865609 82719 258 27351 347 0 0 0.2 06 119060324 2812008 5248 809099 10828 0 0 5.2 07 3195901860 108329926 319617 33103848 435767 0 883453 137 ------------------------------------------------------------------------------- May be the (hopefully correct) numbers therein could be used for comparing purposes. Regards, Reinhard.
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