Author: Gerd Isenberg
Date: 12:03:41 04/28/04
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On April 28, 2004 at 12:12:17, Vincent Diepeveen wrote: >On April 28, 2004 at 11:32:00, Gerd Isenberg wrote: > >>On April 28, 2004 at 09:44:01, Vincent Diepeveen wrote: >> >>>>I tried double nullmove suggested by Vincent too, without any precondition like >>>>eval - margin >= beta. Vincent is probably right - it seems to work great, and >>>>solves a lot of test positions a few percent faster. But with some positions, >>> >>>And how many plies does double nullmove on average search deeper in a normal >>>chess position? >> >>It looks like iterations terminate about 5-10% earlier on average. >>I fear my BF isn't that good to earn an additional ply in standard matches. >> >>My impression with your really great double nullmove idea is >>that it doesn't work so good in critical and probably game decisive positions, >>even in early middlegame root positions. But of course that may be due to my >>implemetation and sideeffects with other things in my search. > >this is a big nonsense and you know it. Sorry Vincent, no - simply my vague impression. Similar to some more additional knowledge, which slows you down a bit, but helps to find some moves one ply or even more plies earlier. Of course i have to investigate it a bit more and play some matches. > >theoretical chess studies which never come onto the board you cannot call >'critical game deciding positions'. > >You show up with some insane positions where uncommon passer knowledge, checks >or pawn evaluation are decisive in terms of whether you find a winning move or >not and you use that to test 'zugzwang'. I thought BT-test positions are from some gm matches? Anyway, there are some other positions i tried so far from my favourite testset, even positions from games IsiChess played, like this am position. 6k1/4bppp/2p3n1/5Q2/1qPB4/1P1R1BP1/r6P/7K w - - am Qc8 > >Both your positions have nothing to do with zugzwang in absolute respect. Just >get a fullwidth search with singular extensions and in your testset positions it >will outgun anything you do with nullmove, i'm sure of it. Ok, i will try and see. > >As long as we are not speaking at the same level with each other, i can't help >it that fullwidth+singular extensions solve anything you show up with sooner. > I fear with search topics and parallel search i'll never reach your level and brilliancy ;-) Cheers, Gerd
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