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Subject: Crafty node count question

Author: Volker Böhm

Date: 11:50:43 03/02/04


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?

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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