Razor on ply one if the advantage is more then a pawn,
the only way to gap the advantage is to capture, so
go directly in quiesce.
This seems to have a positive effect.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
}
}
// Null move search not allowed, try razoring
- else if (depth < RazorDepth && approximateEval < beta - RazorMargin)
+ else if ( (approximateEval < beta - RazorMargin && depth < RazorDepth)
+ ||(approximateEval < beta - PawnValueMidgame && depth <= OnePly))
{
Value v = qsearch(pos, ss, beta-1, beta, Depth(0), ply, threadID);
if (v < beta)