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])))
+ 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;
- v /= PHASE_MIDGAME;
+ v /= int(PHASE_MIDGAME);
// In case of tracing add all single evaluation contributions for both white and black
if (Trace)