#include "bitcount.h"
#include "endgame.h"
+#include "movegen.h"
using std::string;
template<typename M>
void delete_endgame(const typename M::value_type& p) { delete p.second; }
- // Fast stalemate detection with lone king
- bool is_kxk_stalemate(const Position &pos, const Color c) {
- if ( pos.side_to_move() == c &&
- !pos.in_check()) {
- const Square from = pos.king_square(c);
- Bitboard b = pos.attacks_from<KING>(from);
- while (b) {
- // Assume there are no pinned pieces, as it is a lone king
- if (pos.pl_move_is_legal(make_move(from, pop_1st_bit(&b)), 0))
- return false;
- }
- return true;
- }
- return false;
- }
} // namespace
assert(pos.non_pawn_material(weakerSide) == VALUE_ZERO);
assert(pos.piece_count(weakerSide, PAWN) == VALUE_ZERO);
- if (is_kxk_stalemate(pos, weakerSide)) {
+ // Stalemate detection with lone king
+ if ( pos.side_to_move() == weakerSide
+ && !pos.in_check()
+ && !MoveList<MV_LEGAL>(pos).size()) {
return VALUE_DRAW;
}