Author: martin fierz
Date: 00:25:53 09/24/04
Go up one level in this thread
On September 23, 2004 at 19:32:15, Henk Bossinade wrote: >On September 22, 2004 at 17:15:38, Robert Hyatt wrote: > >>On September 22, 2004 at 15:57:34, martin fierz wrote: >> >>>i have a question about root move ordering: my engine currently generates a >>>random root move order, and then orders every move that ever fails high to the >>>top of the list, with previous best moves slowly going down in the list again. >>> >>>how do you order your root move list? by number of nodes to refute? or by >>>something different? >>> >>>cheers >>> martin >> >>Initially I do a q-search after making each root move, and use this score to >>order the moves at the root. If I am pondering I make sure that the move from >>the PV is put first of course. >> >>After each iteration, I re-order the move list keeping the best move first, and >>ordering the rest based on the size of the sub-tree (number of nodes) each >>produced when it was searched. > >I can't get Crafty to produce any output on this: > >[D] 8/8/pppppppK/NBBR1NRp/nbbrqnrP/PPPPPPPk/8/Q7 w - - > >mate in one Qh1 that's a nice one! my program needs 13 seconds on a P4 2.4GHz to see the mate in 1!! cheers martin
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