MoveGivesCheck()

[nescitus]

ICE has:

template ECheck TBoard::moveChecksSidesKing(TMove move)
{
TBitBoard abb = 0;
ESquare kSq = bb.sqOfKing[side], toSq = TMove_TO_SQUARE(move);
const EColor attacker = (side == WHITE ? BLACK : WHITE);

// start with an active check test
// does the moved piece check the king directly in its new position
switch (TMove_MOVED_PIECE(move))
{
case PIECE::PAWN : abb = bbPattern.PAWNS[attacker][toSq]; break;
case PIECE::KNIGHT : abb = bbPattern.KNIGHTS[toSq]; break;
case PIECE::BISHOP : abb = getBishopAttacks(toSq); break;
case PIECE::ROOK : abb = getRookAttacks(toSq); break;
case PIECE::QUEEN : abb = getBishopAttacks(toSq) | getRookAttacks(toSq); break;
case PIECE::KING : if (TMove_IS_CASTELING(move)) abb = FILE_NO[toSq] == C ? abb = getRookAttacks(ESquare(toSq+1)) : abb = getRookAttacks(ESquare(toSq-1));
}

if ((abb & BB_SQUARES[kSq]) != 0) return CHECK; // king is in the attack pattern of the moved piece on its target square, so this is a checking move

// look for a passive check when the moved piece opens a file or rank to the king
// test whether a discovered check is possible, otherwise early exit
if (!TMove_IS_ENPASSENT(move) && ((bbPattern.QUEENS[kSq] & BB_SQUARES[TMove_FROM_SQUARE(move)]) == 0)) return NO_CHECK;

// create a new occupied board pattern that simulates the move
abb = TMove_IS_CAPTURE(move) ? (bb.occupiedSquares & ~BB_SQUARES[TMove_FROM_SQUARE(move)] & ~BB_SQUARES[TMove_CAPTURED_SQUARE(move)]) | BB_SQUARES[toSq] :
(bb.occupiedSquares & ~BB_SQUARES[TMove_FROM_SQUARE(move)]) | BB_SQUARES[toSq];

if ((getBishopAttacks(kSq, abb) & (bb.pcs[PIECE::BISHOP] | bb.pcs[PIECE::QUEEN])) ||
(getRookAttacks(kSq, abb) & (bb.pcs[PIECE::ROOK] | bb.pcs[PIECE::QUEEN]))) return DISCOVERED_CHECK;

return NO_CHECK;
}