ArduChess/Threat.h

42 lines
798 B
C++

#ifndef __THREAT_H_INC
#define __THREAT_H_INC
namespace Threat {
byte can_capture(byte square) {
// TODO make this more efficient
byte t = 0;
Board::swap_side();
Movegen gen = Movegen();
Move m;
while((m = gen.next_move()).sq_to != 255) {
if(m.sq_to == square) {
t++;
}
}
Board::swap_side();
return t;
}
byte threats(byte square) {
byte t = 0;
Board::swap_side();
t = can_capture(square);
Board::swap_side();
return t;
}
bool is_check() {
byte king_ptr = Board::field[PTR_W_KING | Board::black_moving()];
return (threats(king_ptr)) > 0;
}
bool illegal() {
// if the enemy king can be captured, move they did is illegal.
byte king_ptr = Board::field[PTR_W_KING | !Board::black_moving()];
return (can_capture(king_ptr)) > 0;
}
}
#endif