//[MethodImpl(MethodImplOptions.AggressiveInlining)]
private void BitmaskToMoves(Board board, Bitboard bitmask, Position positionFrom, Piece piece, Move[] moves, ref int moveCount)
{
while (bitmask != 0)
{
var i = bitmask.BitScanForward();
var move = new Move(positionFrom, i, piece, board.ArrayBoard[i]);
moves[moveCount++] = move;
bitmask &= bitmask - 1;
}
}
private ulong GetAttackedByKnights(Bitboard knights)
{
ulong allJumps = 0;
while (knights != 0)
{
var i = knights.BitScanForward();
ulong jumps = BitboardConstants.KnightJumps[i];
allJumps |= jumps;
knights &= knights - 1;
}
return(allJumps);
}
private ulong GetAttackedByKings(Bitboard kings)
{
ulong allJumps = 0;
while (kings != 0)
{
var i = kings.BitScanForward();
ulong jumps = BitboardConstants.KingJumps[i];
allJumps |= jumps;
kings &= kings - 1;
}
return(allJumps);
}
//[MethodImpl(MethodImplOptions.AggressiveInlining)]
private ulong GetAttackedBySlidingPieces(Bitboard allPieces, Bitboard slidingPieces, bool diagonal)
{
var allSlide = 0UL;
while (slidingPieces != 0)
{
var i = slidingPieces.BitScanForward();
var slide = diagonal ? SlideMoveGenerator.DiagonalAntidiagonalSlide(allPieces, i) : SlideMoveGenerator.HorizontalVerticalSlide(allPieces, i);
allSlide |= slide;
slidingPieces &= slidingPieces - 1;
}
return(allSlide);
}
public bool IsBitboardAttacked(Board board, Bitboard bitboard, bool byWhite)
{
while (bitboard != 0)
{
var position = bitboard.BitScanForward();
var attacked = IsPositionAttacked(board, position, byWhite);
if (attacked)
{
return(true);
}
bitboard &= bitboard - 1;
}
return(false);
}
public void GetAllPotentialMoves(Board board, Move[] moves, ref int moveCount, Bitboard checkers, Bitboard pinned)
{
var checkCount = checkers.PopCount();
if (checkCount > 1)
{
GetPotentialKingMoves(board, moves, ref moveCount);
return;
}
var allowedFrom = ~0UL;
var allowedTo = ~0UL;
if (checkCount == 1)
{
allowedFrom = ~pinned;
var checkerPos = checkers.BitScanForward();
allowedTo = BitboardConstants.Between[board.KingPositions[board.ColorToMove]][checkerPos] | checkers;
}
else
{
GetPotentialCastlingMoves(board, moves, ref moveCount);
}
GetPotentialKnightMoves(board, allowedFrom, allowedTo, moves, ref moveCount);
GetPotentialBishopMoves(board, allowedFrom, allowedTo, moves, ref moveCount);
GetPotentialRookMoves(board, allowedFrom, allowedTo, moves, ref moveCount);
GetPotentialQueenMoves(board, allowedFrom, allowedTo, moves, ref moveCount);
GetPotentialKingMoves(board, moves, ref moveCount);
if (board.WhiteToMove)
{
GetPotentialWhitePawnCaptures(board, allowedFrom, allowedTo, moves, ref moveCount);
GetPotentialWhitePawnMoves(board, allowedFrom, allowedTo, moves, ref moveCount);
}
else
{
GetPotentialBlackPawnCaptures(board, allowedFrom, allowedTo, moves, ref moveCount);
GetPotentialBlackPawnMoves(board, allowedFrom, allowedTo, moves, ref moveCount);
}
//moves.Sort((m1, m2) => m1.Key2.CompareTo(m2.Key2));
}
