Author: David Dahlem
Date: 13:26:18 08/22/05
Go up one level in this thread
On August 22, 2005 at 16:18:42, Engin Üstün wrote: >On August 22, 2005 at 15:50:15, David Dahlem wrote: > >>What is the most likely cause of a huge node explosion at depth 10, with a >>branching factor of 24? >> >>I'm getting 72% move ordering with this order... >> >>1. Best move in previous ply >>2. Winning captures >>3. Killer moves >>4. Neutral captures >>5. Bad captures >>6. Rest of the moves >> >>Thanks for any clues >>Dave > >i think better is at 5. history moves and then 6. Bad captures or losing >captures at last. > >with perft you get the maximal of nodes at depth X, but nobody knows what is the >minimal of nodes with all tricks (alpha/beta , null move pruning, order moves, >futulity pruning, PVS, Hashtable, internal iterative deeperning...) >it is also interest me too how is the minimum of nodes at depth 10. Not sure if that last sentence is a question or not, but here is what i'm getting from the start position: 4 30 72 301 d2d4 d7d5 c1f4 5 0 72 471 d2d4 d7d5 c1f4 c8f5 5 2 73 1936 e2e4 e7e5 d2d4 6 21 78 7397 e2e4 g8f6 e4e5 f6e4 f1c4 7 0 89 22128 e2e4 d7d5 f1b5 c8d7 b5d7 d8d7 b1c3 e7e6 8 14 128 71984 e2e4 d7d5 b1c3 g8f6 e4d5 f6d5 f1d3 8 15 146 94817 d2d4 d7d5 c1f4 c8f5 b1c3 b8c6 g1f3 9 5 238 206772 d2d4 d7d5 d1d3 e7e6 c1e3 f8d6 d3b5 c7c6 b5a4 9 6 514 527762 e2e4 d7d5 e4d5 d8d5 b1c3 d5e5 f1e2 c8f5 10 9 12706 13889956 e2e4 d7d5 b1c3 d5d4 c3d5 c8e6 g1f3 e6d5 Regards Dave
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