From 145d29314211536e7508d3f07ee9d68c171370cc Mon Sep 17 00:00:00 2001 From: Marco Costalba Date: Sun, 4 May 2014 09:42:05 +0200 Subject: [PATCH] Revert stalemate detection in evaluation Unfortunatly we have a slow down that causes a regression in STC with no-regression mode: LLR: -2.96 (-2.94,2.94) [-3.00,1.00] Total: 22454 W: 3836 L: 4029 D: 14589 bench: 8678654 --- src/evaluate.cpp | 7 ------- 1 file changed, 7 deletions(-) diff --git a/src/evaluate.cpp b/src/evaluate.cpp index 34a87771..341b5068 100644 --- a/src/evaluate.cpp +++ b/src/evaluate.cpp @@ -787,13 +787,6 @@ namespace { sf = ScaleFactor(50 * sf / SCALE_FACTOR_NORMAL); } - // Stealmate detection - Color stm = pos.side_to_move(); - if ( (ei.attackedBy[stm][ALL_PIECES] == ei.attackedBy[stm][KING]) - && (!(ei.attackedBy[stm][KING] & ~ei.attackedBy[~stm][ALL_PIECES])) - && !MoveList(pos).size()) - sf = SCALE_FACTOR_DRAW; - // Interpolate between a middlegame and a (scaled by 'sf') endgame score Value v = mg_value(score) * int(ei.mi->game_phase()) + eg_value(score) * int(PHASE_MIDGAME - ei.mi->game_phase()) * sf / SCALE_FACTOR_NORMAL; -- 2.39.2