static void add_en_passant_captures(list_t * list, const board_t * board) {
int from, to;
int me;
int inc;
int pawn;
ASSERT(list!=NULL);
ASSERT(board!=NULL);
to = board->ep_square;
if (to != SquareNone) {
me = board->turn;
inc = PAWN_MOVE_INC(me);
pawn = PAWN_MAKE(me);
from = to - (inc-1);
if (board->square[from] == pawn) {
ASSERT(!SQUARE_IS_PROMOTE(to));
LIST_ADD(list,MOVE_MAKE_FLAGS(from,to,MoveEnPassant));
}
from = to - (inc+1);
if (board->square[from] == pawn) {
ASSERT(!SQUARE_IS_PROMOTE(to));
LIST_ADD(list,MOVE_MAKE_FLAGS(from,to,MoveEnPassant));
}
}
}
static void add_castle_moves(list_t * list, const board_t * board) {
ASSERT(list!=NULL);
ASSERT(board!=NULL);
ASSERT(!board_is_check(board));
if (COLOUR_IS_WHITE(board->turn)) {
if ((board->flags & FlagsWhiteKingCastle) != 0
&& board->square[F1] == Empty
&& board->square[G1] == Empty
&& !is_attacked(board,F1,Black)) {
LIST_ADD(list,MOVE_MAKE_FLAGS(E1,G1,MoveCastle));
}
if ((board->flags & FlagsWhiteQueenCastle) != 0
&& board->square[D1] == Empty
&& board->square[C1] == Empty
&& board->square[B1] == Empty
&& !is_attacked(board,D1,Black)) {
LIST_ADD(list,MOVE_MAKE_FLAGS(E1,C1,MoveCastle));
}
} else { // black
if ((board->flags & FlagsBlackKingCastle) != 0
&& board->square[F8] == Empty
&& board->square[G8] == Empty
&& !is_attacked(board,F8,White)) {
LIST_ADD(list,MOVE_MAKE_FLAGS(E8,G8,MoveCastle));
}
if ((board->flags & FlagsBlackQueenCastle) != 0
&& board->square[D8] == Empty
&& board->square[C8] == Empty
&& board->square[B8] == Empty
&& !is_attacked(board,D8,White)) {
LIST_ADD(list,MOVE_MAKE_FLAGS(E8,C8,MoveCastle));
}
}
}
static bool add_pawn_captures(list_t * list, const board_t * board, int to, bool legal, bool stop) {
int me;
int inc;
int pawn;
int from;
ASSERT(list!=NULL);
ASSERT(board!=NULL);
ASSERT(SQUARE_IS_OK(to));
ASSERT(legal==true||legal==false);
ASSERT(stop==true||stop==false);
ASSERT(COLOUR_IS(board->square[to],COLOUR_OPP(board->turn)));
me = board->turn;
inc = PAWN_MOVE_INC(me);
pawn = PAWN_MAKE(me);
from = to - (inc-1);
if (board->square[from] == pawn) {
if (!legal || !is_pinned(board,from,me)) {
if (stop) return true;
add_pawn_move(list,from,to);
}
}
from = to - (inc+1);
if (board->square[from] == pawn) {
if (!legal || !is_pinned(board,from,me)) {
if (stop) return true;
add_pawn_move(list,from,to);
}
}
if (board->ep_square != SquareNone
&& to == SQUARE_EP_DUAL(board->ep_square)) {
ASSERT(PAWN_RANK(to,me)==Rank5);
ASSERT(PIECE_IS_PAWN(board->square[to]));
to = board->ep_square;
ASSERT(PAWN_RANK(to,me)==Rank6);
ASSERT(board->square[to]==Empty);
from = to - (inc-1);
if (board->square[from] == pawn) {
if (!legal || !is_pinned(board,from,me)) {
if (stop) return true;
ASSERT(!SQUARE_IS_PROMOTE(to));
LIST_ADD(list,MOVE_MAKE_FLAGS(from,to,MoveEnPassant));
}
}
from = to - (inc+1);
if (board->square[from] == pawn) {
if (!legal || !is_pinned(board,from,me)) {
if (stop) return true;
ASSERT(!SQUARE_IS_PROMOTE(to));
LIST_ADD(list,MOVE_MAKE_FLAGS(from,to,MoveEnPassant));
}
}
}
return false;
}
