Author: Gerd Isenberg
Date: 10:58:01 11/06/03
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On November 06, 2003 at 04:51:38, José Carlos wrote: > This position is easy, but interesting: > >[D]r2qk2r/pp3ppp/2pbpn2/4Nb2/PnBP2P1/2N1P3/1P3P1P/R1BQ1RK1 b kq g3 0 1 > > Black plays Ng4 with big advantage. > Anubis (complex qsearch) finds it in iteration 8, while Averno (simple >qsearch) needs 12. Studying what the program was searching in qsearch in this >position has been very interesting for me. > How does your program here? > > José C. Hi José, your nice position is sensible to several extensions, like nullmove related mate threat extension or Markoff-Botwinnik extensions and probably other static king safety related extensions, like (half) opening files near the king, attacking neighboured king squares etc. I use triggers for doing checks in qsearch to some variable depth. And of course it's very sensible on more or less speculative king safety evaluation. Mine get's it at depth 4. Cheers, Gerd
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