Author: Matthias Gemuh
Date: 09:40:03 01/11/02
Go up one level in this thread
On January 11, 2002 at 11:44:39, David Rasmussen wrote: >[D]2Q2n2/2R4p/1p1qpp1k/8/3P3P/3B2P1/5PK1/r7 w - - 0 1 > >In the above position, my search tree explodes because of extensions. It takes > >3 minutes and 42 million nodes to finish an 8 ply search. How does your program >do? > >Any good ideas on how to limit extensions in such a position. > >P.S. Solving the position is no problem. It is a simple mate in 5 plies, and is >found very early on at depth 1 or 2 or so. Still, there must be something >unsound about my extensions, or at least room for improvement, when this >position makes the tree explode. > >/David My HyLogicChess has the following stats: All extensions active. Quiescence moves: 29% (no explosion, my average is normally have 40%) Total moves searched: 11000 Speed; 84 kN/s Move Ordering: 78% (normally 90%..92%) [1] (0.18) 1.f3 (00h:00m:00s) [2] (0.12) 1.Qb7 e5 (00h:00m:00s) [3] (14.50) 1.Qxf8 Kh5 2.Rxh7 Kg4 3.Qxd6 (00h:00m:00s) [4] (+Mate in 3) 1.Qxf8 Kh5 2.Rxh7 Kg4 3.f3 (00h:00m:00s)
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