public override void GenerateSpecialMoves(MoveList list, bool capturesOnly, int ply)
{
if (!capturesOnly)
{
int priv = ply == 1 ? gameHistory[Game.GameMoveNumber] : privs[ply - 1];
if (Game.CurrentSide == 0 && (priv & 1) == 1)
{
foreach (int direction in directions)
{
int square = Board.NextSquare(direction, kingSquare[0]);
if (square >= 0 && Board[square] == null)
{
list.BeginMoveAdd(MoveType.StandardMove, kingSquare[0], square);
Piece king = list.AddPickup(kingSquare[0]);
list.AddDrop(king, square);
list.EndMoveAdd(500);
}
}
}
else if (Game.CurrentSide == 1 && (priv & 2) == 2)
{
foreach (int direction in directions)
{
int square = Board.NextSquare(direction, kingSquare[1]);
if (square >= 0 && Board[square] == null)
{
list.BeginMoveAdd(MoveType.StandardMove, kingSquare[1], square);
Piece king = list.AddPickup(kingSquare[1]);
list.AddDrop(king, square);
list.EndMoveAdd(500);
}
}
}
}
}
public override MoveEventResponse MoveBeingGenerated(MoveList moves, int from, int to, MoveType type)
{
Piece movingPiece = Board[from];
if (movingPiece.TypeNumber == promotingTypeNumber)
{
Location loc = Board.SquareToLocation(Board.PlayerSquare(movingPiece.Player, to));
PromotionOption option = condition(loc);
if (option != PromotionOption.CannotPromote)
{
// enemy piece being captured (if any)
Piece capturedEnemyPiece = Board[to];
// if promotion is optional, add move without promotion
if (option == PromotionOption.CanPromote)
{
if (capturedEnemyPiece == null)
{
moves.AddMove(from, to, true);
}
else
{
moves.AddCapture(from, to, true);
}
}
List <int> pieceTypesFound = new List <int>();
List <Piece> capturedPieces = Game.GetCapturedPieceList(movingPiece.Player);
foreach (Piece capturedFriendlyPiece in capturedPieces)
{
if (capturedFriendlyPiece.TypeNumber != movingPiece.TypeNumber &&
!pieceTypesFound.Contains(capturedFriendlyPiece.TypeNumber))
{
if (capturedEnemyPiece == null)
{
moves.BeginMoveAdd(MoveType.MoveReplace, from, to, capturedFriendlyPiece.TypeNumber);
moves.AddPickup(from);
moves.AddDrop(capturedFriendlyPiece, to);
moves.EndMoveAdd(5000 + capturedFriendlyPiece.PieceType.MidgameValue);
}
else
{
moves.BeginMoveAdd(MoveType.CaptureReplace, from, to, capturedFriendlyPiece.TypeNumber);
moves.AddPickup(from);
moves.AddPickup(to);
moves.AddDrop(capturedFriendlyPiece, to);
moves.EndMoveAdd(5000 + capturedFriendlyPiece.PieceType.MidgameValue + capturedEnemyPiece.PieceType.MidgameValue);
}
pieceTypesFound.Add(capturedFriendlyPiece.TypeNumber);
}
}
return(MoveEventResponse.Handled);
}
}
return(MoveEventResponse.NotHandled);
}
public override MoveEventResponse MoveBeingGenerated(MoveList moves, int from, int to, MoveType type)
{
Piece movingPiece = Board[from];
if (movingPiece == null)
{
throw new System.Exception("ex");
}
if (movingPiece.TypeNumber == promotingTypeNumber)
{
// check the from-square condition (if any, usually there isn't)
if (origLocationCondition != null)
{
Location fromLocation = Board.SquareToLocation(Board.PlayerSquare(movingPiece.Player, from));
if (!origLocationCondition(fromLocation))
{
return(MoveEventResponse.NotHandled);
}
}
// check the to-square condition
Location toLocation = Board.SquareToLocation(Board.PlayerSquare(movingPiece.Player, to));
if (destLocationCondition(toLocation))
{
// this is a promotion; add one move for each promotion type
Piece capturedPiece = Board[to];
if (capturedPiece == null)
{
foreach (PieceType promoteTo in promotionTypes)
{
moves.BeginMoveAdd(MoveType.MoveWithPromotion, from, to);
moves.AddPickup(from);
moves.AddDrop(movingPiece, to, promoteTo);
moves.EndMoveAdd(5000 + promoteTo.MidgameValue);
}
}
else
{
foreach (PieceType promoteTo in promotionTypes)
{
moves.BeginMoveAdd(MoveType.CaptureWithPromotion, from, to);
moves.AddPickup(from);
moves.AddPickup(to);
moves.AddDrop(movingPiece, to, promoteTo);
moves.EndMoveAdd(5000 + promoteTo.MidgameValue + capturedPiece.PieceType.MidgameValue);
}
}
return(MoveEventResponse.Handled);
}
}
return(MoveEventResponse.NotHandled);
}
public override void GenerateSpecialMoves(MoveList list, bool capturesOnly, int ply)
{
int epSquare = ply == 1 ? gameHistory[Game.GameMoveNumber] : epSquares[ply - 1];
if (epSquare > 0)
{
int nd = Game.PlayerDirection(Game.CurrentSide ^ 1, NDirection);
int sq = Board.NextSquare(nd, epSquare);
Piece pawn = Board[sq];
for (int ndir = 0; ndir < nAttackDirections; ndir++)
{
int nextSquare = Board.NextSquare(attackDirections[Game.CurrentSide ^ 1, ndir], epSquare);
if (nextSquare >= 0)
{
Piece piece = Board[nextSquare];
if (piece != null && piece.PieceType == PawnType && piece.Player == Game.CurrentSide)
{
// find square of pawn being captured. we may have to make several
// steps for large-board games where pawns make more than two steps
// and can still be captured e.p.
int captureSquare = Board.NextSquare(nd, epSquare);
while (Board[captureSquare] == null)
{
captureSquare = Board.NextSquare(nd, captureSquare);
}
// this piece can capture en passant
int nSquaresFirstBoard = Board.NumSquares / 2;
if (epSquare > nSquaresFirstBoard)
{
list.BeginMoveAdd(MoveType.EnPassant, nextSquare, epSquare - nSquaresFirstBoard);
list.AddPickup(nextSquare);
list.AddPickup(captureSquare);
list.AddDrop(piece, epSquare - nSquaresFirstBoard, null);
list.EndMoveAdd(120);
}
else
{
list.BeginMoveAdd(MoveType.EnPassant, nextSquare, epSquare + nSquaresFirstBoard);
list.AddPickup(nextSquare);
list.AddPickup(captureSquare);
list.AddDrop(piece, epSquare + nSquaresFirstBoard, null);
list.EndMoveAdd(120);
}
}
}
}
}
}
public override MoveEventResponse MoveBeingGenerated(MoveList moves, int from, int to, MoveType type)
{
int nSquaresOnFirstBoard = Board.NumSquares / 2;
if (type == MoveType.StandardMove)
{
if (to >= nSquaresOnFirstBoard)
{
if (Board[to - nSquaresOnFirstBoard] == null)
{
moves.AddMove(from, to - nSquaresOnFirstBoard, true);
}
}
else
{
if (Board[to + nSquaresOnFirstBoard] == null)
{
moves.AddMove(from, to + nSquaresOnFirstBoard, true);
}
}
return(MoveEventResponse.Handled);
}
else if (type == MoveType.StandardCapture)
{
if (to >= nSquaresOnFirstBoard)
{
moves.BeginMoveAdd(MoveType.StandardCapture, from, to - nSquaresOnFirstBoard);
Piece pieceBeingMoved = moves.AddPickup(from);
Piece pieceBeingCaptured = moves.AddPickup(to);
moves.AddDrop(pieceBeingMoved, to - nSquaresOnFirstBoard);
moves.EndMoveAdd(3000 +
pieceBeingCaptured.PieceType.MidgameValue -
(pieceBeingMoved.PieceType.MidgameValue / 16));
}
else
{
moves.BeginMoveAdd(MoveType.StandardCapture, from, to + nSquaresOnFirstBoard);
Piece pieceBeingMoved = moves.AddPickup(from);
Piece pieceBeingCaptured = moves.AddPickup(to);
moves.AddDrop(pieceBeingMoved, to + nSquaresOnFirstBoard);
moves.EndMoveAdd(3000 +
pieceBeingCaptured.PieceType.MidgameValue -
(pieceBeingMoved.PieceType.MidgameValue / 16));
}
return(MoveEventResponse.Handled);
}
return(MoveEventResponse.NotHandled);
}
// *** OVERRIDES *** //
public override void GenerateSpecialMoves(MoveList list, bool capturesOnly, int ply)
{
if (!capturesOnly)
{
BitBoard pawns = Board.GetPieceTypeBitboard(Game.CurrentSide, PawnType.TypeNumber);
while (pawns)
{
int pawnSquare = pawns.ExtractLSB();
int nextSquare = Board.NextSquare(PredefinedDirections.N + Game.CurrentSide, pawnSquare);
if (nextSquare >= 0 && Board[nextSquare] != null &&
Board[nextSquare].TypeNumber == PawnType.TypeNumber &&
Board[nextSquare].Player != Game.CurrentSide)
{
Piece enemyPawn = Board[nextSquare];
// we can only perform the swap if the enemyPawn is not
// currently attacking any piece of the current side
int attackSquare1 = Board.NextSquare(PredefinedDirections.E, pawnSquare);
int attackSquare2 = Board.NextSquare(PredefinedDirections.W, pawnSquare);
if ((attackSquare1 < 0 || Board[attackSquare1] == null || Board[attackSquare1].Player != Game.CurrentSide) &&
(attackSquare2 < 0 || Board[attackSquare2] == null || Board[attackSquare2].Player != Game.CurrentSide))
{
// swap move is legal - add it now
list.BeginMoveAdd(MoveType.Swap, pawnSquare, nextSquare);
Piece myPawn = list.AddPickup(pawnSquare);
enemyPawn = list.AddPickup(nextSquare);
list.AddDrop(myPawn, nextSquare);
list.AddDrop(enemyPawn, pawnSquare);
list.EndMoveAdd(25);
}
}
}
}
}
public override MoveEventResponse MoveBeingGenerated(MoveList moves, int from, int to, MoveType type)
{
if (currentState >= 4)
{
// Handle the automatic drops of the silver and gold generals at the beginning of the game
if (Board[from].PieceType != pawnType || Game.StartingPieceSquares[Board[from].Player, from] == 0)
{
return(MoveEventResponse.IllegalMove);
}
//PieceType dropType = currentState < 6 ? silverGeneralType : goldGeneralType;
moves.BeginMoveAdd(MoveType.StandardMove, from, to);
Piece pawn = moves.AddPickup(from);
moves.AddDrop(pawn, to);
moves.AddDrop(generals[currentState - 4], from);
moves.EndMoveAdd(pawnType.GetMidgamePST(Board.PlayerSquare(Board[from].Player, to)));
return(MoveEventResponse.Handled);
}
else
{
// Don't allow to move the same piece twice in a row unless it is a king
if (Board[from] == pieceLastMoved[searchStateHistoryIndex - 1] && Board[from].PieceType != kingType)
{
return(MoveEventResponse.IllegalMove);
}
}
return(MoveEventResponse.NotHandled);
}
public override void GenerateSpecialMoves(MoveList list, bool capturesOnly, int ply)
{
if (!capturesOnly)
{
int king = Board.GetPieceTypeBitboard(Game.CurrentSide, kingType.TypeNumber).LSB;
if (!IsSquareAttacked(king, Game.CurrentSide ^ 1))
{
for (int dir = 0; dir < 8; dir++)
{
int nextSquare = Board.NextSquare(dir, king);
if (nextSquare >= 0 && Board[nextSquare] != null &&
Board[nextSquare].Player == Game.CurrentSide &&
Board[nextSquare].PieceType != pawnType)
{
// The king can swap with this piece. We won't bother
// to see if the target square is attacked because the
// CheckmateRule is going to verify that anyway and we
// don't want to perform that operation twice.
list.BeginMoveAdd(MoveType.Swap, king, nextSquare);
Piece kingpiece = list.AddPickup(king);
Piece otherpiece = list.AddPickup(nextSquare);
list.AddDrop(kingpiece, nextSquare);
list.AddDrop(otherpiece, king);
list.EndMoveAdd(0);
}
}
}
}
}
// *** EVENT HANDLERS *** //
public override MoveEventResponse MoveBeingGenerated(MoveList moves, int from, int to, MoveType type)
{
if (Board[from].PieceType == PieceType)
{
int direction = Board.DirectionLookup(from, to);
if (direction >= 0)
{
int nextStep = Board.NextSquare(direction, to);
if (nextStep >= 0 && nextStep < Board.NumSquares)
{
Piece pieceOnNextSquare = Board[nextStep];
Piece pieceOnLandingSquare = Board[to];
if (pieceOnNextSquare != null && pieceOnNextSquare.Player != Board[from].Player)
{
// we can capture by advance
moves.BeginMoveAdd(pieceOnLandingSquare == null ? MoveType.BaroqueCapture : MoveType.ExtraCapture, from, to, nextStep);
Piece pieceBeingMoved = moves.AddPickup(from);
Piece pieceBeingCaptured = moves.AddPickup(nextStep);
if (pieceOnLandingSquare != null)
{
moves.AddPickup(to);
}
moves.AddDrop(pieceBeingMoved, to);
moves.EndMoveAdd(pieceOnLandingSquare == null
? (3000 + pieceBeingCaptured.PieceType.MidgameValue - (pieceBeingMoved.PieceType.MidgameValue / 16))
: (4000 + pieceBeingCaptured.PieceType.MidgameValue + pieceOnLandingSquare.PieceType.MidgameValue - (pieceBeingMoved.PieceType.MidgameValue / 16)));
return(MoveEventResponse.Handled);
}
}
}
}
return(base.MoveBeingGenerated(moves, from, to, type));
}
public override void GenerateSpecialMoves(MoveList list, bool capturesOnly, int ply)
{
int epCaptureSquare = ply == 1
? (Game.GameMoveNumber == 0 ? epCaptureSquares[0] : gameHistoryCaptureSquares[Game.GameMoveNumber - 1])
: epCaptureSquares[ply - 1];
if (epCaptureSquare > 0)
{
int targetSquare = ply == 1
? (Game.GameMoveNumber == 0 ? epMoverSquares[0] : gameHistoryMoverSquares[Game.GameMoveNumber - 1])
: epMoverSquares[ply - 1];
int victimPawnMoveDirection = Board.DirectionLookup(epCaptureSquare, targetSquare);
Piece targetPawn = Board[targetSquare];
while (epCaptureSquare != targetSquare)
{
int s = Board.NextSquare(captureDirections[targetPawn.Player], epCaptureSquare);
Piece attacker = Board[Board.NextSquare(captureDirections[targetPawn.Player], epCaptureSquare)];
if (attacker.PieceType == PawnType)
{
// this is a valid en passant attack
list.BeginMoveAdd(MoveType.EnPassant, attacker.Square, epCaptureSquare);
list.AddPickup(attacker.Square);
list.AddPickup(targetPawn.Square);
list.AddDrop(attacker, epCaptureSquare, null);
list.EndMoveAdd(3000);
}
epCaptureSquare = Board.NextSquare(victimPawnMoveDirection, epCaptureSquare);
}
}
}
public override MoveEventResponse MoveBeingGenerated(MoveList moves, int from, int to, MoveType type)
{
Piece movingPiece = Board[from];
foreach (var change in changes)
{
if (change.PieceType == movingPiece.PieceType)
{
bool capturing = (type & MoveType.CaptureProperty) != 0;
if ((capturing && change.ChangeOnCapture) || (!capturing && change.ChangeOnMove))
{
Piece capturedPiece = Board[to];
if (capturedPiece != null)
{
// does capture have to be of a specific type?
if (change.RequiredCaptureType != null &&
// and is this the wrong type?
capturedPiece.PieceType != change.RequiredCaptureType)
{
// this change rule is not applicable
continue;
}
moves.BeginMoveAdd(type, from, to);
moves.AddPickup(from);
moves.AddPickup(to);
moves.AddDrop(movingPiece, to, change.NewType);
moves.EndMoveAdd(change.NewType.MidgameValue - change.PieceType.MidgameValue
+ change.NewType.GetMidgamePST(from) - change.PieceType.GetMidgamePST(to)
+ capturedPiece.PieceType.MidgameValue + 1000);
}
else
{
moves.BeginMoveAdd(type, from, to);
moves.AddPickup(from);
moves.AddDrop(movingPiece, to, change.NewType);
moves.EndMoveAdd(change.NewType.MidgameValue - change.PieceType.MidgameValue
+ change.NewType.GetMidgamePST(from) - change.PieceType.GetMidgamePST(to));
}
return(MoveEventResponse.Handled);
}
continue;
}
}
return(MoveEventResponse.NotHandled);
}
public override void GenerateSpecialMoves(MoveList list, bool capturesOnly, int ply)
{
int kingSquare = Board.GetPieceTypeBitboard(Game.CurrentSide, kingType.TypeNumber).LSB;
BitBoard potentialAttackers = Board.GetPieceTypeBitboard(Game.CurrentSide ^ 1, chasingType.TypeNumber);
while (potentialAttackers)
{
int sq = potentialAttackers.ExtractLSB();
int direction = Board.DirectionLookup(sq, kingSquare);
if (direction >= 0 && chasingType.AttackRangePerDirection[direction] >= Board.GetDistance(sq, kingSquare))
{
// King is attacked by appropriate chasing type.
// Allow him to flee two squares in any direction.
for (int nDir = 0; nDir < 8; nDir++)
{
int nextSquare = Board.NextSquare(nDir, kingSquare);
if (nextSquare >= 0 && Board[nextSquare] == null)
{
nextSquare = Board.NextSquare(nDir, nextSquare);
if (nextSquare >= 0)
{
Piece pieceOnSquare = Board[nextSquare];
if (pieceOnSquare == null)
{
list.BeginMoveAdd(MoveType.StandardMove, kingSquare, nextSquare);
Piece king = list.AddPickup(kingSquare);
list.AddDrop(king, nextSquare);
list.EndMoveAdd(150);
}
else if (pieceOnSquare.Player != Game.CurrentSide)
{
list.BeginMoveAdd(MoveType.StandardCapture, kingSquare, nextSquare);
Piece king = list.AddPickup(kingSquare);
list.AddPickup(nextSquare);
list.AddDrop(king, nextSquare);
list.EndMoveAdd(3000 + pieceOnSquare.PieceType.MidgameValue);
}
}
}
}
}
}
}
public static bool CustomMoveGenerationHandler(PieceType pieceType, Piece piece, MoveList moveList, bool capturesOnly)
{
MoveCapability[] moves;
int nMoves = pieceType.GetMoveCapabilities(out moves);
for (int nMove = 0; nMove < nMoves; nMove++)
{
MoveCapability move = moves[nMove];
int step = 1;
int nextSquare = piece.Board.NextSquare(piece.Player, move.NDirection, piece.Square);
while (nextSquare >= 0 && step <= move.MaxSteps)
{
Piece pieceOnSquare = piece.Board[nextSquare];
if (pieceOnSquare != null)
{
if (step >= move.MinSteps && move.CanCapture && pieceOnSquare.Player != piece.Player)
{
moveList.AddCapture(piece.Square, nextSquare);
}
else if (step >= move.MinSteps && pieceOnSquare.Player == piece.Player && piece.PieceType != pieceOnSquare.PieceType)
{
// self-capture move allowing relocation of friendly piece
int currentSquare = piece.Square;
while (currentSquare != nextSquare)
{
moveList.BeginMoveAdd(MoveType.MoveRelay, piece.Square, nextSquare, currentSquare);
moveList.AddPickup(piece.Square);
moveList.AddPickup(nextSquare);
moveList.AddDrop(piece, nextSquare);
moveList.AddDrop(pieceOnSquare, currentSquare);
moveList.EndMoveAdd(piece.PieceType.GetMidgamePST(nextSquare) - piece.PieceType.GetMidgamePST(piece.Square) +
pieceOnSquare.PieceType.GetMidgamePST(currentSquare) - pieceOnSquare.PieceType.GetMidgamePST(nextSquare));
currentSquare = piece.Board.NextSquare(piece.Player, move.NDirection, currentSquare);
}
}
nextSquare = -1;
}
else
{
if (step >= move.MinSteps && !move.MustCapture && !capturesOnly)
{
moveList.AddMove(piece.Square, nextSquare);
}
nextSquare = piece.Board.NextSquare(piece.Player, move.NDirection, nextSquare);
step++;
}
}
}
return(false);
}
public override void GenerateSpecialMoves(MoveList list, bool capturesOnly, int ply)
{
if (!capturesOnly)
{
int pocketSquare = pocketSquares[Game.CurrentSide];
Piece pieceInPocket = Board[pocketSquare];
if (pieceInPocket != null)
{
for (int square = 0; square < Board.NumSquares; square++)
{
if (Board[square] == null)
{
list.BeginMoveAdd(MoveType.Drop, pocketSquare, square);
Piece piece = list.AddPickup(pocketSquare);
list.AddDrop(piece, square, pieceInPocket.PieceType);
list.EndMoveAdd(piece.PieceType.GetMidgamePST(square) - 10);
}
}
}
}
}
// *** OVERRIDES *** //
public override void GenerateSpecialMoves(MoveList list, bool capturesOnly, int ply)
{
if (!capturesOnly)
{
int nSquaresFirstBoard = Board.NumSquares / 2;
int castlingPriv = ply == 1 ? gameHistoryPrivs[Game.GameMoveNumber] : searchStackPrivs[ply - 1];
for (int x = 0; x < nCastlingMoves[Game.CurrentSide]; x++)
{
if ((castlingMoves[Game.CurrentSide, x].RequiredPriv & castlingPriv) != 0)
{
// make sure final landing squares on the other board are free
if (castlingMoves[Game.CurrentSide, x].KingFromSquare < nSquaresFirstBoard)
{
// going from first board to second
if (Board[castlingMoves[Game.CurrentSide, x].KingToSquare + nSquaresFirstBoard] != null ||
Board[castlingMoves[Game.CurrentSide, x].OtherToSquare + nSquaresFirstBoard] != null)
{
// occupied - castling not possible
continue;
}
}
else
{
// going from second board to first
if (Board[castlingMoves[Game.CurrentSide, x].KingToSquare - nSquaresFirstBoard] != null ||
Board[castlingMoves[Game.CurrentSide, x].OtherToSquare - nSquaresFirstBoard] != null)
{
// occupied - castling not possible
continue;
}
}
// find the left-most square that needs to be free on the board castling FROM
int minSquare = castlingMoves[Game.CurrentSide, x].KingFromSquare;
minSquare = castlingMoves[Game.CurrentSide, x].KingToSquare < minSquare ? castlingMoves[Game.CurrentSide, x].KingToSquare : minSquare;
minSquare = castlingMoves[Game.CurrentSide, x].OtherFromSquare < minSquare ? castlingMoves[Game.CurrentSide, x].OtherFromSquare : minSquare;
minSquare = castlingMoves[Game.CurrentSide, x].OtherToSquare < minSquare ? castlingMoves[Game.CurrentSide, x].OtherToSquare : minSquare;
// find the right-most square that needs to be free on the board castling FROM
int maxSquare = castlingMoves[Game.CurrentSide, x].KingFromSquare;
maxSquare = castlingMoves[Game.CurrentSide, x].KingToSquare > maxSquare ? castlingMoves[Game.CurrentSide, x].KingToSquare : maxSquare;
maxSquare = castlingMoves[Game.CurrentSide, x].OtherFromSquare > maxSquare ? castlingMoves[Game.CurrentSide, x].OtherFromSquare : maxSquare;
maxSquare = castlingMoves[Game.CurrentSide, x].OtherToSquare > maxSquare ? castlingMoves[Game.CurrentSide, x].OtherToSquare : maxSquare;
// make sure the squares are empty
bool squaresEmpty = true;
for (int file = Board.GetFile(minSquare); squaresEmpty && file <= Board.GetFile(maxSquare); file++)
{
int sq = file * Board.NumRanks + Board.GetRank(minSquare);
if (sq != castlingMoves[Game.CurrentSide, x].KingFromSquare &&
sq != castlingMoves[Game.CurrentSide, x].OtherFromSquare &&
Board[sq] != null)
{
// the path is blocked by a piece other than those involved in castling
squaresEmpty = false;
}
}
if (squaresEmpty)
{
// make sure squares the King is passes through are not attacked
bool squaresAttacked = false;
if (castlingMoves[Game.CurrentSide, x].KingFromSquare < castlingMoves[Game.CurrentSide, x].KingToSquare)
{
for (int file = Board.GetFile(castlingMoves[Game.CurrentSide, x].KingFromSquare);
!squaresAttacked && file <= Board.GetFile(castlingMoves[Game.CurrentSide, x].KingToSquare); file++)
{
int sq = file * Board.NumRanks + Board.GetRank(castlingMoves[Game.CurrentSide, x].KingFromSquare);
if (Game.IsSquareAttacked(sq, Game.CurrentSide ^ 1))
{
squaresAttacked = true;
}
}
}
else
{
for (int file = Board.GetFile(castlingMoves[Game.CurrentSide, x].KingFromSquare);
!squaresAttacked && file >= Board.GetFile(castlingMoves[Game.CurrentSide, x].KingToSquare); file--)
{
int sq = file * Board.NumRanks + Board.GetRank(castlingMoves[Game.CurrentSide, x].KingFromSquare);
if (Game.IsSquareAttacked(sq, Game.CurrentSide ^ 1))
{
squaresAttacked = true;
}
}
}
if (!squaresAttacked)
{
// required squares are empty and not attacked so the move is legal - add it
if (castlingMoves[Game.CurrentSide, x].KingFromSquare < nSquaresFirstBoard)
{
// going from first board to second
list.BeginMoveAdd(MoveType.Castling, castlingMoves[Game.CurrentSide, x].KingFromSquare,
castlingMoves[Game.CurrentSide, x].KingToSquare + nSquaresFirstBoard);
Piece king = list.AddPickup(castlingMoves[Game.CurrentSide, x].KingFromSquare);
Piece other = list.AddPickup(castlingMoves[Game.CurrentSide, x].OtherFromSquare);
list.AddDrop(king, castlingMoves[Game.CurrentSide, x].KingToSquare + nSquaresFirstBoard, null);
list.AddDrop(other, castlingMoves[Game.CurrentSide, x].OtherToSquare + nSquaresFirstBoard, null);
list.EndMoveAdd(1000);
}
else
{
// going from second board to first
list.BeginMoveAdd(MoveType.Castling, castlingMoves[Game.CurrentSide, x].KingFromSquare,
castlingMoves[Game.CurrentSide, x].KingToSquare - nSquaresFirstBoard);
Piece king = list.AddPickup(castlingMoves[Game.CurrentSide, x].KingFromSquare);
Piece other = list.AddPickup(castlingMoves[Game.CurrentSide, x].OtherFromSquare);
list.AddDrop(king, castlingMoves[Game.CurrentSide, x].KingToSquare - nSquaresFirstBoard, null);
list.AddDrop(other, castlingMoves[Game.CurrentSide, x].OtherToSquare - nSquaresFirstBoard, null);
list.EndMoveAdd(1000);
}
}
}
}
}
}
}
public override MoveEventResponse MoveBeingGenerated(MoveList moves, int from, int to, MoveType type)
{
Piece movingPiece = Board[from];
foreach (PromotionCapability promotion in promotionCapabilities)
{
if (movingPiece.TypeNumber == promotion.PromotingTypeNumber)
{
Location toLocation = Board.SquareToLocation(Board.PlayerSquare(movingPiece.Player, to));
PromotionOption option = promotion.FromAndToConditionDelegate != null
? promotion.FromAndToConditionDelegate(Board.SquareToLocation(Board.PlayerSquare(movingPiece.Player, from)), toLocation)
: promotion.ConditionDelegate(toLocation);
if (option != PromotionOption.CannotPromote)
{
for (int x = 0; x < Game.MAX_PIECE_TYPES; x++)
{
typesUsed[x] = false;
}
// enemy piece being captured (if any)
Piece capturedPiece = Board[to];
// if promotion is optional, add move without promotion
if (option == PromotionOption.CanPromote)
{
if (capturedPiece == null)
{
moves.AddMove(from, to, true);
}
else
{
moves.AddCapture(from, to, true);
}
}
// handle traditional promotion
if (promotion.PromotionTypes != null)
{
if (capturedPiece == null)
{
foreach (PieceType promoteTo in promotion.PromotionTypes)
{
moves.BeginMoveAdd(MoveType.MoveWithPromotion, from, to);
moves.AddPickup(from);
moves.AddDrop(movingPiece, to, promoteTo);
moves.EndMoveAdd(5000 + promoteTo.MidgameValue);
typesUsed[promoteTo.TypeNumber] = true;
}
}
else
{
foreach (PieceType promoteTo in promotion.PromotionTypes)
{
moves.BeginMoveAdd(MoveType.CaptureWithPromotion, from, to);
moves.AddPickup(from);
moves.AddPickup(to);
moves.AddDrop(movingPiece, to, promoteTo);
moves.EndMoveAdd(5000 + promoteTo.MidgameValue + capturedPiece.PieceType.MidgameValue);
typesUsed[promoteTo.TypeNumber] = true;
}
}
}
// handle promotion by replacement
if (promotion.ReplacementPromotionTypes != null)
{
List <Piece> capturedPieces = Game.GetCapturedPieceList(movingPiece.Player);
foreach (Piece capturedFriendlyPiece in capturedPieces)
{
if (capturedFriendlyPiece.TypeNumber != movingPiece.TypeNumber &&
!typesUsed[capturedFriendlyPiece.TypeNumber] &&
promotion.ReplacementPromotionTypes.Contains(capturedFriendlyPiece.PieceType))
{
if (capturedPiece == null)
{
moves.BeginMoveAdd(MoveType.MoveReplace, from, to, capturedFriendlyPiece.TypeNumber);
moves.AddPickup(from);
moves.AddDrop(capturedFriendlyPiece, to);
moves.EndMoveAdd(5000 + capturedFriendlyPiece.PieceType.MidgameValue);
}
else
{
moves.BeginMoveAdd(MoveType.CaptureReplace, from, to, capturedFriendlyPiece.TypeNumber);
moves.AddPickup(from);
moves.AddPickup(to);
moves.AddDrop(capturedFriendlyPiece, to);
moves.EndMoveAdd(5000 + capturedFriendlyPiece.PieceType.MidgameValue + capturedPiece.PieceType.MidgameValue);
}
typesUsed[capturedFriendlyPiece.TypeNumber] = true;
}
}
}
return(MoveEventResponse.Handled);
}
}
}
return(MoveEventResponse.NotHandled);
}
public override void GenerateSpecialMoves(MoveList list, bool capturesOnly, int ply)
{
if (!capturesOnly)
{
int nSquaresFirstBoard = Board.NumSquares / 2;
int castlingPriv = ply == 1 ? gameHistoryPrivs[Game.GameMoveNumber] : searchStackPrivs[ply - 1];
for (int x = 0; x < nCastlingMoves[Game.CurrentSide]; x++)
{
if ((castlingMoves[Game.CurrentSide, x].RequiredPriv & castlingPriv) != 0)
{
if (castlingMoves[Game.CurrentSide, x].KingFromSquare < castlingMoves[Game.CurrentSide, x].KingToSquare)
{
bool squaresEmpty = true;
for (int file = Board.GetFile(castlingMoves[Game.CurrentSide, x].KingFromSquare) + 1;
squaresEmpty && (file <= Board.GetFile(castlingMoves[Game.CurrentSide, x].KingToSquare) ||
file <= Board.GetFile(castlingMoves[Game.CurrentSide, x].OtherFromSquare)); file++)
{
int sq = file * Board.NumRanks + Board.GetRank(castlingMoves[Game.CurrentSide, x].KingFromSquare);
if (sq != castlingMoves[Game.CurrentSide, x].OtherFromSquare && Board[sq] != null)
{
squaresEmpty = false;
}
}
if (squaresEmpty)
{
bool squaresAttacked = false;
for (int file = Board.GetFile(castlingMoves[Game.CurrentSide, x].KingFromSquare);
!squaresAttacked && file <= Board.GetFile(castlingMoves[Game.CurrentSide, x].KingToSquare); file++)
{
int sq = file * Board.NumRanks + Board.GetRank(castlingMoves[Game.CurrentSide, x].KingFromSquare);
if (Game.IsSquareAttacked(sq, Game.CurrentSide ^ 1))
{
squaresAttacked = true;
}
}
if (!squaresAttacked)
{
if (castlingMoves[Game.CurrentSide, x].KingToSquare < nSquaresFirstBoard)
{
// moving from first board to second board
if (Board[castlingMoves[Game.CurrentSide, x].KingToSquare + nSquaresFirstBoard] == null &&
Board[castlingMoves[Game.CurrentSide, x].KingToSquare - Board.NumRanks + nSquaresFirstBoard] == null)
{
list.BeginMoveAdd(MoveType.Castling, castlingMoves[Game.CurrentSide, x].KingFromSquare,
castlingMoves[Game.CurrentSide, x].KingToSquare + nSquaresFirstBoard);
Piece king = list.AddPickup(castlingMoves[Game.CurrentSide, x].KingFromSquare);
Piece other = list.AddPickup(castlingMoves[Game.CurrentSide, x].OtherFromSquare);
list.AddDrop(king, castlingMoves[Game.CurrentSide, x].KingToSquare + nSquaresFirstBoard, null);
list.AddDrop(other, castlingMoves[Game.CurrentSide, x].KingToSquare - Board.NumRanks + nSquaresFirstBoard, null);
list.EndMoveAdd(1000);
}
}
else
{
// moving from second board to first board
if (Board[castlingMoves[Game.CurrentSide, x].KingToSquare - nSquaresFirstBoard] == null &&
Board[castlingMoves[Game.CurrentSide, x].OtherToSquare - nSquaresFirstBoard] == null)
{
list.BeginMoveAdd(MoveType.Castling, castlingMoves[Game.CurrentSide, x].KingFromSquare,
castlingMoves[Game.CurrentSide, x].KingToSquare - nSquaresFirstBoard);
Piece king = list.AddPickup(castlingMoves[Game.CurrentSide, x].KingFromSquare);
Piece other = list.AddPickup(castlingMoves[Game.CurrentSide, x].OtherFromSquare);
list.AddDrop(king, castlingMoves[Game.CurrentSide, x].KingToSquare - nSquaresFirstBoard, null);
list.AddDrop(other, castlingMoves[Game.CurrentSide, x].KingToSquare - Board.NumRanks - nSquaresFirstBoard, null);
list.EndMoveAdd(1000);
}
}
for (int file = Board.GetFile(castlingMoves[Game.CurrentSide, x].KingToSquare) + 1;
!squaresAttacked && file < Board.GetFile(castlingMoves[Game.CurrentSide, x].OtherFromSquare); file++)
{
int sq = file * Board.NumRanks + Board.GetRank(castlingMoves[Game.CurrentSide, x].KingFromSquare);
squaresAttacked = Game.IsSquareAttacked(sq, Game.CurrentSide ^ 1);
if (!squaresAttacked)
{
if (castlingMoves[Game.CurrentSide, x].KingToSquare < nSquaresFirstBoard)
{
// moving from first board to second board
if (Board[sq + nSquaresFirstBoard] == null &&
Board[sq - Board.NumRanks + nSquaresFirstBoard] == null)
{
list.BeginMoveAdd(MoveType.Castling, castlingMoves[Game.CurrentSide, x].KingFromSquare, sq + nSquaresFirstBoard);
Piece king = list.AddPickup(castlingMoves[Game.CurrentSide, x].KingFromSquare);
Piece other = list.AddPickup(castlingMoves[Game.CurrentSide, x].OtherFromSquare);
list.AddDrop(king, sq + nSquaresFirstBoard, null);
list.AddDrop(other, sq - Board.NumRanks + nSquaresFirstBoard, null);
list.EndMoveAdd(1000);
}
}
else
{
// moving from second board to first board
if (Board[sq - nSquaresFirstBoard] == null &&
Board[sq - Board.NumRanks - nSquaresFirstBoard] == null)
{
list.BeginMoveAdd(MoveType.Castling, castlingMoves[Game.CurrentSide, x].KingFromSquare, sq - nSquaresFirstBoard);
Piece king = list.AddPickup(castlingMoves[Game.CurrentSide, x].KingFromSquare);
Piece other = list.AddPickup(castlingMoves[Game.CurrentSide, x].OtherFromSquare);
list.AddDrop(king, sq - nSquaresFirstBoard, null);
list.AddDrop(other, sq - Board.NumRanks - nSquaresFirstBoard, null);
list.EndMoveAdd(1000);
}
}
}
}
}
}
}
else
{
bool squaresEmpty = true;
for (int file = Board.GetFile(castlingMoves[Game.CurrentSide, x].KingFromSquare) - 1;
squaresEmpty && (file >= Board.GetFile(castlingMoves[Game.CurrentSide, x].KingToSquare) ||
file >= Board.GetFile(castlingMoves[Game.CurrentSide, x].OtherFromSquare)); file--)
{
int sq = file * Board.NumRanks + Board.GetRank(castlingMoves[Game.CurrentSide, x].KingFromSquare);
if (sq != castlingMoves[Game.CurrentSide, x].OtherFromSquare && Board[sq] != null)
{
squaresEmpty = false;
}
}
if (squaresEmpty)
{
bool squaresAttacked = false;
for (int file = Board.GetFile(castlingMoves[Game.CurrentSide, x].KingFromSquare);
!squaresAttacked && file >= Board.GetFile(castlingMoves[Game.CurrentSide, x].KingToSquare); file--)
{
int sq = file * Board.NumRanks + Board.GetRank(castlingMoves[Game.CurrentSide, x].KingFromSquare);
if (Game.IsSquareAttacked(sq, Game.CurrentSide ^ 1))
{
squaresAttacked = true;
}
}
if (!squaresAttacked)
{
if (castlingMoves[Game.CurrentSide, x].KingToSquare < nSquaresFirstBoard)
{
// moving from first board to second board
if (Board[castlingMoves[Game.CurrentSide, x].KingToSquare + nSquaresFirstBoard] == null &&
Board[castlingMoves[Game.CurrentSide, x].KingToSquare + Board.NumRanks + nSquaresFirstBoard] == null)
{
list.BeginMoveAdd(MoveType.Castling, castlingMoves[Game.CurrentSide, x].KingFromSquare,
castlingMoves[Game.CurrentSide, x].KingToSquare + nSquaresFirstBoard);
Piece king = list.AddPickup(castlingMoves[Game.CurrentSide, x].KingFromSquare);
Piece other = list.AddPickup(castlingMoves[Game.CurrentSide, x].OtherFromSquare);
list.AddDrop(king, castlingMoves[Game.CurrentSide, x].KingToSquare + nSquaresFirstBoard, null);
list.AddDrop(other, castlingMoves[Game.CurrentSide, x].KingToSquare + Board.NumRanks + nSquaresFirstBoard, null);
list.EndMoveAdd(1000);
}
}
else
{
// moving from second board to first board
if (Board[castlingMoves[Game.CurrentSide, x].KingToSquare - nSquaresFirstBoard] == null &&
Board[castlingMoves[Game.CurrentSide, x].KingToSquare + Board.NumRanks - nSquaresFirstBoard] == null)
{
list.BeginMoveAdd(MoveType.Castling, castlingMoves[Game.CurrentSide, x].KingFromSquare,
castlingMoves[Game.CurrentSide, x].KingToSquare + nSquaresFirstBoard);
Piece king = list.AddPickup(castlingMoves[Game.CurrentSide, x].KingFromSquare);
Piece other = list.AddPickup(castlingMoves[Game.CurrentSide, x].OtherFromSquare);
list.AddDrop(king, castlingMoves[Game.CurrentSide, x].KingToSquare - nSquaresFirstBoard, null);
list.AddDrop(other, castlingMoves[Game.CurrentSide, x].KingToSquare + Board.NumRanks - nSquaresFirstBoard, null);
list.EndMoveAdd(1000);
}
}
for (int file = Board.GetFile(castlingMoves[Game.CurrentSide, x].KingFromSquare) - 1;
!squaresAttacked && file > Board.GetFile(castlingMoves[Game.CurrentSide, x].OtherFromSquare); file--)
{
int sq = file * Board.NumRanks + Board.GetRank(castlingMoves[Game.CurrentSide, x].KingFromSquare);
squaresAttacked = Game.IsSquareAttacked(sq, Game.CurrentSide ^ 1);
if (!squaresAttacked)
{
if (castlingMoves[Game.CurrentSide, x].KingToSquare < nSquaresFirstBoard)
{
// moving from first board to second board
if (Board[sq + nSquaresFirstBoard] == null &&
Board[sq + Board.NumRanks + nSquaresFirstBoard] == null)
{
list.BeginMoveAdd(MoveType.Castling, castlingMoves[Game.CurrentSide, x].KingFromSquare, sq + nSquaresFirstBoard);
Piece king = list.AddPickup(castlingMoves[Game.CurrentSide, x].KingFromSquare);
Piece other = list.AddPickup(castlingMoves[Game.CurrentSide, x].OtherFromSquare);
list.AddDrop(king, sq + nSquaresFirstBoard, null);
list.AddDrop(other, sq + Board.NumRanks + nSquaresFirstBoard, null);
list.EndMoveAdd(1000);
}
}
else
{
// moving from second board to first board
if (Board[sq - nSquaresFirstBoard] == null &&
Board[sq + Board.NumRanks - nSquaresFirstBoard] == null)
{
list.BeginMoveAdd(MoveType.Castling, castlingMoves[Game.CurrentSide, x].KingFromSquare, sq - nSquaresFirstBoard);
Piece king = list.AddPickup(castlingMoves[Game.CurrentSide, x].KingFromSquare);
Piece other = list.AddPickup(castlingMoves[Game.CurrentSide, x].OtherFromSquare);
list.AddDrop(king, sq - nSquaresFirstBoard, null);
list.AddDrop(other, sq + Board.NumRanks - nSquaresFirstBoard, null);
list.EndMoveAdd(1000);
}
}
}
}
}
}
}
}
}
}
}
public static bool CustomMoveGenerationHandler(PieceType pieceType, Piece piece, MoveList moveList, bool capturesOnly)
{
MoveCapability[] moves;
int nMoves = pieceType.GetMoveCapabilities(out moves);
for (int nMove = 0; nMove < nMoves; nMove++)
{
MoveCapability move = moves[nMove];
int step = 1;
int nextSquare = piece.Board.NextSquare(piece.Player, move.NDirection, piece.Square);
while (nextSquare >= 0 && step <= move.MaxSteps)
{
Piece pieceOnSquare = piece.Board[nextSquare];
if (pieceOnSquare != null)
{
if (step >= move.MinSteps && move.CanCapture && pieceOnSquare.Player != piece.Player)
{
moveList.AddCapture(piece.Square, nextSquare);
for (int x = 0; x < 8; x++)
{
int targetSquare = piece.Board.NextSquare(x, nextSquare);
if (targetSquare >= 0 && piece.Board[targetSquare] != null && piece.Board[targetSquare].Player != piece.Player)
{
moveList.BeginMoveAdd(MoveType.ExtraCapture, piece.Square, nextSquare, targetSquare);
moveList.AddPickup(piece.Square);
moveList.AddPickup(nextSquare);
moveList.AddPickup(targetSquare);
moveList.AddDrop(piece, nextSquare);
moveList.EndMoveAdd(4000 + piece.Board[nextSquare].PieceType.MidgameValue + piece.Board[targetSquare].PieceType.MidgameValue);
}
}
}
nextSquare = -1;
}
else
{
if (step >= move.MinSteps && !move.MustCapture)
{
if (!capturesOnly)
{
moveList.AddMove(piece.Square, nextSquare);
}
for (int x = 0; x < 8; x++)
{
int targetSquare = piece.Board.NextSquare(x, nextSquare);
if (targetSquare >= 0 && piece.Board[targetSquare] != null && piece.Board[targetSquare].Player != piece.Player)
{
moveList.BeginMoveAdd(MoveType.ExtraCapture, piece.Square, nextSquare, targetSquare);
moveList.AddPickup(piece.Square);
moveList.AddPickup(targetSquare);
moveList.AddDrop(piece, nextSquare);
moveList.EndMoveAdd(3000 + piece.Board[targetSquare].PieceType.MidgameValue);
}
}
}
nextSquare = piece.Board.NextSquare(piece.Player, move.NDirection, nextSquare);
step++;
}
}
}
return(false);
}
protected void generatePermutations(MoveList moves, int from, int to, int pendingBits, int activeBits)
{
if (pendingBits == 0)
{
// here is where we generate a move, capturing whichever pieces
// are indicated by activeBits
if (activeBits != 0)
{
// Determine whether activeBits has only one bit set.
// If it has only one, the type of generated move will
// be MoveType.ExtraCapture (a move type inherrently
// understood by the framework.) If more than one
// bit is set, we have multiple indirect captures and
// we will need to use a custom MoveType
MoveType moveType = (activeBits & (activeBits - 1)) == 0
? MoveType.ExtraCapture
: MoveType.CustomMove;
// Calculate the evaluation for the move (we will add to
// it as we pick up other pieces
int eval = 2000 + (Board[to] != null ? Board[to].MidgameValue : 0);
// Add the move
moves.BeginMoveAdd(moveType, from, to, activeBits);
Piece movingPiece = moves.AddPickup(from);
if (Board[to] != null)
{
moves.AddPickup(to);
}
// Step through the intervening squares picking up
// the appropriate pieces
int direction = Board.DirectionLookup(from, to);
int nSteps = 1;
int nextSquare = Board.NextSquare(direction, from);
while (nextSquare != to && activeBits != 0)
{
if ((activeBits & (1 << (nSteps - 1))) != 0)
{
moves.AddPickup(nextSquare);
if (moveType == MoveType.ExtraCapture)
{
moves.SetMoveTag(nextSquare);
}
eval += Board[nextSquare].MidgameValue;
activeBits ^= 1 << (nSteps - 1);
}
nextSquare = Board.NextSquare(direction, nextSquare);
nSteps++;
}
moves.AddDrop(movingPiece, to);
moves.EndMoveAdd(eval);
}
}
else
{
// get the next bit from pendingBits and recursively call this
// function both with and without that bit in activeBits
int newPendingBits = pendingBits ^ (pendingBits & -pendingBits);
int currentBit = pendingBits ^ newPendingBits;
generatePermutations(moves, from, to, newPendingBits, activeBits);
generatePermutations(moves, from, to, newPendingBits, activeBits | currentBit);
}
}
public override void GenerateSpecialMoves(MoveList list, bool capturesOnly, int ply)
{
if (!capturesOnly)
{
int castlingPriv = ply == 1 ? gameHistoryPrivs[Game.GameMoveNumber] : searchStackPrivs[ply - 1];
for (int x = 0; x < nCastlingMoves[Game.CurrentSide]; x++)
{
if ((castlingMoves[Game.CurrentSide, x].RequiredPriv & castlingPriv) != 0)
{
// find the left-most square that needs to be free
int minSquare = castlingMoves[Game.CurrentSide, x].KingFromSquare;
minSquare = castlingMoves[Game.CurrentSide, x].KingToSquare < minSquare ? castlingMoves[Game.CurrentSide, x].KingToSquare : minSquare;
minSquare = castlingMoves[Game.CurrentSide, x].OtherFromSquare < minSquare ? castlingMoves[Game.CurrentSide, x].OtherFromSquare : minSquare;
minSquare = castlingMoves[Game.CurrentSide, x].OtherToSquare < minSquare ? castlingMoves[Game.CurrentSide, x].OtherToSquare : minSquare;
// find the right-most square that needs to be free
int maxSquare = castlingMoves[Game.CurrentSide, x].KingFromSquare;
maxSquare = castlingMoves[Game.CurrentSide, x].KingToSquare > maxSquare ? castlingMoves[Game.CurrentSide, x].KingToSquare : maxSquare;
maxSquare = castlingMoves[Game.CurrentSide, x].OtherFromSquare > maxSquare ? castlingMoves[Game.CurrentSide, x].OtherFromSquare : maxSquare;
maxSquare = castlingMoves[Game.CurrentSide, x].OtherToSquare > maxSquare ? castlingMoves[Game.CurrentSide, x].OtherToSquare : maxSquare;
// make sure the squares are empty
bool squaresEmpty = true;
for (int file = Board.GetFile(minSquare); squaresEmpty && file <= Board.GetFile(maxSquare); file++)
{
int sq = file * Board.NumRanks + Board.GetRank(minSquare);
if (sq != castlingMoves[Game.CurrentSide, x].KingFromSquare &&
sq != castlingMoves[Game.CurrentSide, x].OtherFromSquare &&
Board[sq] != null)
{
// the path is blocked by a piece other than those involved in castling
squaresEmpty = false;
}
}
if (squaresEmpty)
{
// make sure squares the King is passes through are not attacked
bool squaresAttacked = false;
// if this game doesn't have check/checkmate, we don't care if the squares are attacked
if (hasCheckmateRule)
{
if (castlingMoves[Game.CurrentSide, x].KingFromSquare < castlingMoves[Game.CurrentSide, x].KingToSquare)
{
for (int file = Board.GetFile(castlingMoves[Game.CurrentSide, x].KingFromSquare);
!squaresAttacked && file <= Board.GetFile(castlingMoves[Game.CurrentSide, x].KingToSquare); file++)
{
int sq = file * Board.NumRanks + Board.GetRank(castlingMoves[Game.CurrentSide, x].KingFromSquare);
if (Game.IsSquareAttacked(sq, Game.CurrentSide ^ 1))
{
squaresAttacked = true;
}
}
}
else
{
for (int file = Board.GetFile(castlingMoves[Game.CurrentSide, x].KingFromSquare);
!squaresAttacked && file >= Board.GetFile(castlingMoves[Game.CurrentSide, x].KingToSquare); file--)
{
int sq = file * Board.NumRanks + Board.GetRank(castlingMoves[Game.CurrentSide, x].KingFromSquare);
if (Game.IsSquareAttacked(sq, Game.CurrentSide ^ 1))
{
squaresAttacked = true;
}
}
}
}
if (!squaresAttacked)
{
// required squares are empty and not attacked so the move is legal - add it
if (Board[castlingMoves[Game.CurrentSide, x].KingFromSquare] == null)
{
throw new Exception("!");
}
list.BeginMoveAdd(MoveType.Castling, castlingMoves[Game.CurrentSide, x].KingFromSquare,
castlingMoves[Game.CurrentSide, x].KingToSquare);
Piece king = list.AddPickup(castlingMoves[Game.CurrentSide, x].KingFromSquare);
Piece other = list.AddPickup(castlingMoves[Game.CurrentSide, x].OtherFromSquare);
list.AddDrop(king, castlingMoves[Game.CurrentSide, x].KingToSquare, null);
list.AddDrop(other, castlingMoves[Game.CurrentSide, x].OtherToSquare, null);
list.EndMoveAdd(100);
}
}
}
}
}
}