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Stockfish 1.2 optimistic

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Optimistic razoring settings. It is stronger with
most engines but weaker with someones.

The default is instead more solid and uniform with all
the opponents.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2008-12-29 12:24:34 +01:00
parent 11763d2b7f
commit cc3c1dc25a
1 changed files with 3 additions and 3 deletions
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6
src/search.cpp
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@ -1241,14 +1241,14 @@ namespace {
else if ( !value_is_mate(beta)
&& approximateEval < beta - RazorMargin
&& depth < RazorDepth
&& (RazorAtDepthOne || depth >= 2*OnePly)
&& (RazorAtDepthOne || depth > OnePly)
&& ttMove == MOVE_NONE
&& !pos.has_pawn_on_7th(pos.side_to_move()))
{
Value v = qsearch(pos, ss, beta-1, beta, Depth(0), ply, threadID);
if ( (v < beta - RazorMargin - RazorMargin / 4)
|| (depth < 3*OnePly && v < beta - RazorMargin)
|| (depth < 2*OnePly && v < beta - RazorMargin / 2))
|| (depth <= 2*OnePly && v < beta - RazorMargin)
|| (depth <= OnePly && v < beta - RazorMargin / 2))
return v;
}