Author: Reinhard Scharnagl
Date: 09:17:48 09/06/04
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On September 06, 2004 at 12:03:44, Uri Blass wrote: >On September 06, 2004 at 11:45:29, Reinhard Scharnagl wrote: > >>Uri, >> >>I have made a little additional test (without mate detecting): >> >>FEN: rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1 >> >> +-*--b--c--d--*--f--g--*-+ MS Visual Studio C++ Version 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. >>------------------------------------------------------------------------------- >>1 20 0 0 0 0 0 0 0 >>2 400 0 0 0 0 0 0 0 >>3 8902 34 0 12 0 0 0 0 >>4 197281 1576 0 469 0 0 0 0 >>5 4865609 82719 258 27351 0 0 0 0 >>6 119060324 2812008 5248 809099 0 0 0 6 >>7 3195901860 108329926 319617 33103848 0 0 883453 150 >>------------------------------------------------------------------------------- >> >>It seems to be about 10% faster without checking for mates. >> >>Those 10% seem to be the prize if one wants to have also that information. >> >>Regards, Reinhard. >Thanks for this information >What is the prize for detecting checks? > >I have a legal move generator but I detect checks today only during make move >and not during move generation. > >Uri Hi Uri, The detecting of checks is so essentially integrated within my move generation, that it hardly could be switched off without rewriting the whole approach. Thus I cannot provide you with that requested value, sorry. But have a look at following statistics in calculating secure fields the king would be able to move on: [http://www.chessbox.de/Down/CRC_Test_01.txt] Reinhard.
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