Author: Antonio Dieguez
Date: 04:46:33 11/19/99
Go up one level in this thread
On November 18, 1999 at 18:24:30, leonid wrote: >On November 18, 1999 at 11:40:31, Bas Hamstra wrote: > >>On November 18, 1999 at 08:35:56, Antonio Dieguez wrote: >> >>>On November 18, 1999 at 06:41:49, Bas Hamstra wrote: >>> >>>hi Bas, >>> >>>>My program uses incremental move generation, in the sense that 1 move at the >>>>time is generated. I too think the advantage over staged generators (eg. only >>>>captures) is small, if any at all. >>> >>>and which is the move ordering in your program? >>> >>>>Bas Hamstra. >> >>I have one old complete program and 8 incomplete testbeds :) >> >>The complete program uses this: >> >>- BM from hash >>- Non losing caps sorted MVV and within that LVA (so not quite MVV/LVA) >>- 2 Killers >>- Non caps unsorted >>- Losing caps >> >>That's it. I see no need for history sorting, nor for SEE sorting. It uses >>incremental peudo attack updating, that basically makes you have all captures at >>hand at any time. And a cheap SEE. And cheap Check-checking :) >> >> >>Regards, >>Bas Hamstra. > >Since your moves ordering is so different from mine would like to ask you two >questions: > >1) What is BM from hash (best move from hash table?)? >1) How many nodes per ply your logic is forced to see, in general, when search > goes by frute force? When in ply we have around 30 nodes. > >I am asking you this because beside my different moves ordering, I have the >impression that mine is still very far from perfection. > >My moves ordering start with the moves that lead to check. This give you the >idea how my moves ordering should be different from your. > >Leonid. hi again leonid! about the issue of try the moves that check the opponent first, wich is rare, I still dont think its best.Its true that the tree of them is smaller, but if for example the oponent in the next move only have three or less available moves you would like to extend and see the continuation with may be 1 ply more right? so the tree is bigger.Its good to extend I think... but if you dont extend its your decision. me
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