Author: leonid
Date: 07:44:24 11/24/99
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On November 24, 1999 at 09:47:30, blass uri wrote: >On November 24, 1999 at 08:30:06, Jari Huikari wrote: > >>On November 22, 1999 at 19:05:13, leonid wrote: >> >>>Was puzzled few times by finding that many logics use illegal moves and >>>succesfully. Until now I used this kind of moves only in the ply zero. Expect to >>>rewrite my logic completelly with usage of illegal moves in every ply. >> >>This doesn't answer to your questions, but I decided to mention it anyway. >>Am I alone or does someone else also generate only legal moves? >> >> Jari > >I remember karinsdad said that he decided to generate only legal moves because >he cannot use ideas like the single reply extension if he generate illegal >moves. > >I have another question. >Did people try to compare between the 2 options before deciding to generate >illegal moves and if the answer is positive what was the result of the >comparison. > >Is the legal move generator slower in solving test positions(assuming no special >extensions like single reply extension) and how much slower? > >Uri Privet, Your question is very good and I hope somebody will respond to it for both of us. Only about usage of illegal moves I can say you one thing, I tryed two kinds of moves for special logic that solve the mate. Logic with illegal moves generated the response more slowly that with legal moves. Diffrence is about 30%. In both logics I never used hash tables. Leonid.
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