Author: José Carlos
Date: 08:23:19 01/21/00
Averno has a very slow move generation. Although I know I have to face this problem soon, I'd like to try some methods to avoid the horizont effect, that causes me lots of headaches. How did old machines (Forte/Super Forte, Mephisto Almeria/Portorose, etc...) that ran in very slow hardware avoid this problem? I don't think null move can help me, since my prog sees 4-6 plys in midgame, so I can't apply null move at so shallow depth (am I wrong about this?). I implemeted hash tables, that improves move ordering, but hash tables are not magic. About extensions, I implemented checks and recaptures, but since my prog had problems in long series of captures, I define recapture as a capture after another, not necessaryly reestablishing the material imbalance. As well, I extend a full ply in recaptures, since in a so shallow depth, it is very difficult to find four captures (most people extend 3/4 ply in recaptures, right?). Extensions help, but I still got problems with horizont effect. Any suggestions? Thanks in advance. José C. PS.: I use PVS and Aspiration search.
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