Author: Robert Hyatt
Date: 11:50:16 01/29/04
Go up one level in this thread
On January 29, 2004 at 13:21:58, Tord Romstad wrote: >On January 29, 2004 at 13:12:18, Duncan Roberts wrote: > >>> >>>Crafty on quad opteron 2.2ghz: >>> >>> 12 2.47 1.09 1. Rc3 c6 2. Qxe6 Qd7 3. Qxd7+ Rxd7 >>> 4. Nd6+ Rxd6 5. Re7+ Ka6 6. Rxg7 Rf8 >>> 7. a3 Rf4 8. Rc7 Kb5 9. Rxa7 Rxg4 >> >> >>I do not understand how these numbers work. It says 12 ply in 2.47 sec, but >>shows 9 moves.? > >It is very common that the length of the principal variation is bigger than the >search depth. Most engines search deeper in lines containing checks, captures >and other forcing moves. > >This is true for all chess engines, not just for Crafty. > Right. If you look at the PV, there are three checks, which extend the depth to 15 plies, there is one recapture, which takes it to 16 plies, and then the last two moves are probably q-search... >Tord
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