For queen mobility could be bigger then 15, so
we need count_1s() not count_1s_max_15().
This bug was introduced by patch:
"Group common evaluate code" of 24/9/2008
So it's almost 4 months and two release old!
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
Bitboard bb = (b & ~ei.attackedBy[them][PAWN]);
// Mobility
- int mob = count_1s_max_15(bb & ~p.pieces_of_color(us));
+ int mob = (Piece != QUEEN ? count_1s_max_15(bb & ~p.pieces_of_color(us))
+ : count_1s(bb & ~p.pieces_of_color(us)));
+
ei.mgMobility += Sign[us] * MgBonus[Piece][mob];
ei.egMobility += Sign[us] * EgBonus[Piece][mob];