Problem is that npMaterial is compared to _endgame_ value
of rook, although npMaterial is always (also in endgame!)
calculated using _middlegame_ values.
Bug was hidden as long as Rook middlegame
and endgame values were same.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
else if ( pos.non_pawn_material(BLACK) == Value(0)
&& pos.piece_count(BLACK, PAWN) == 0
- && pos.non_pawn_material(WHITE) >= RookValueEndgame)
+ && pos.non_pawn_material(WHITE) >= RookValueMidgame)
{
mi->evaluationFunction = &EvaluateKXK;
return mi;
}
else if ( pos.non_pawn_material(WHITE) == Value(0)
&& pos.piece_count(WHITE, PAWN) == 0
- && pos.non_pawn_material(BLACK) >= RookValueEndgame)
+ && pos.non_pawn_material(BLACK) >= RookValueMidgame)
{
mi->evaluationFunction = &EvaluateKKX;
return mi;