Author: Andrew Wagner
Date: 19:22:35 04/27/04
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On April 27, 2004 at 22:01:31, Joel wrote: >Hey Andrew, > >The recap extension is one such example. > >Try extending 1 full ply always when making a recapture of similar value. It >initially seems to give you tactical strength, (it did when my engine was new, >and had no such extension) but it also hurt my depth a fair bit. Worked great on >the testsuites too. > >However, as my program has got stronger, I found that limiting the extension in >various ways actually improved the strength of my program. I am sure there are >positions where the old aggressive recap extender tactically crushes the newer >more controlled bodo. However, the newer bodo gains a bit more depth on all the >quieter positions, which translates to better positional play. Since these >quieter positions are in the majority, the overall performance of bodo increased >when I limited the extension somewhat. Interestingly enough, my WAC scores >dropped! > >I use WAC more as a bug testing tool. > >Joel Hiya Joel! Very interesting. I'd be curious how exactly you limited your recapturing extension. I just essentially say "if the last move was a capture, and the move before that was a capture on the same square, extend this search." I didn't know it got more sophisticated than this... Andrew
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