Author: Volker Böhm
Date: 15:07:18 03/02/04
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On March 02, 2004 at 15:05:33, Robert Hyatt wrote: >On March 02, 2004 at 14:50:43, Volker Böhm wrote: > >>Hi, >> >>in the post "Simple rook sac" I´ve found the following crafty analysis result: >> >> time=8:36 cpu=395% mat=1 n=1370692317 fh=92% nps=2.66M >> ext-> chk=58001759 cap=3294306 pp=293332 1rep=5509951 mate=376022 >> predicted=0 nodes=1370692317 evals=299470745 >> endgame tablebase-> probes=0 hits=0 >> SMP-> split=2056 stop=369 data=9/32 cpu=33:59 elap=8:36 >> >>Crafty got 300M evals and 1370M nodes. >>My Question: >> >>Why has crafty got that much less evals than nodes? What does crafty count as >>node and when does crafty don´t need to eval. Non leaf-nodes, hash-hits with >>right depth and value range, anything else? > >all of those, plus "lazy eval" cutoffs that avoid doing a full eval... When do you use lazy eval? If (material + bonus < alpha) || (material - bonus > beta)? how big is bonus? Do you count passed pawns in "material"? For me passed-pawns + king-attack + pawn-shield could get up to 6 pawns "positional" value. Is your bonus much less than your theroretical positional value? Thanks! Greetings Volker > > >> >>My engine is doing eval at every horizont position and at every q-Search >>position. My engines evals/nodes is about 0.8. >> >>Greetings Volker
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