public void UndoMovement(Position origin, Position destination, Piece capturedPiece)
{
// Lift up the piece at destination and storing it to use after
Piece pPicked = Gboard.LiftPiece(destination);
//
if (capturedPiece != null)
{
// Give captured piece back to previous location (the pPicked destination)
Gboard.PutPiece(capturedPiece, destination);
// Remove it from the captured pieces set
CapturedPieces.Remove(capturedPiece);
}
// Using the lifted up piece to place it as it was before
Gboard.PutPiece(pPicked, origin);
pPicked.Positioning = origin;
pPicked.DecrementQtdMoves();
// #SpecialMovement : Castling (1)
if (pPicked is King && destination.Collumn == origin.Collumn + 2)
{
Position rookOrigin = new Position(origin.Line, origin.Collumn + 3);
Position rookDestination = new Position(origin.Line, origin.Collumn + 1);
// It takes the pieces (now it is lifted up) in origin and in the destination.
Piece p = Gboard.LiftPiece(rookDestination);
Gboard.PutPiece(p, rookOrigin);
p.Positioning = rookDestination;
p.DecrementQtdMoves();
}
// #SpecialMovement : Castling (1)
if (pPicked is King && destination.Collumn == origin.Collumn - 2)
{
Position rookOrigin = new Position(origin.Line, origin.Collumn - 4);
Position rookDestination = new Position(origin.Line, origin.Collumn - 1);
// It takes the pieces (now it is lifted up) in origin and in the destination.
Piece pos = Gboard.LiftPiece(rookDestination);
Gboard.PutPiece(pos, rookOrigin);
pos.Positioning = rookDestination;
pos.DecrementQtdMoves();
}
// #SpecialMovement : En passant
if (pPicked is Pawn)
{
if (origin.Collumn != destination.Collumn && capturedPiece == VulnerableEnPassant)
{
Piece pawn = Gboard.LiftPiece(destination);
Position posCaptured;
if (pPicked.Color == Color.White)
{
posCaptured = new Position(3, destination.Collumn);
}
else
{
posCaptured = new Position(4, destination.Collumn);
}
Gboard.PutPiece(pawn, posCaptured);
}
}
}
// Here we make the tests
public void DoTheMove(Position origin, Position destination)
{
Piece capturedPiece = MovePiece(origin, destination);
// Current player getting itself in check
if (Check == true)
{
if (InCheck(currentPlayer))
{
UndoMovement(origin, destination, capturedPiece);
throw new GameBoardException("You can not let your own king in check, try to save him!");
}
}
else
{
if (InCheck(currentPlayer))
{
UndoMovement(origin, destination, capturedPiece);
throw new GameBoardException("You must not put your own king in check!");
}
}
Piece p = Gboard.GetPiece(destination);
// #SpecialMovement : Pawn promotion
if (p is Pawn)
{
if (p.Color == Color.White && destination.Line == 0 || p.Color == Color.Black && destination.Line == 7)
{
p = Gboard.LiftPiece(destination);
PiecesInGame.Remove(p);
Piece queen = new Queen(Gboard, p.Color);
Gboard.PutPiece(queen, destination);
PiecesInGame.Add(queen);
}
}
// Current player cheking his adversary
if (InCheck(AdversaryOf(currentPlayer)))
{
Check = true;
}
else
{
Check = false;
}
if (CheckMate(AdversaryOf(currentPlayer)))
{
MatchEnded = true;
}
else
{
turn++;
ChangePlayer();
}
// #SpecialMovement : En passant
if (p is Pawn && (destination.Line == origin.Line - 2 || destination.Line == origin.Line + 2))
{
VulnerableEnPassant = p;
}
else
{
VulnerableEnPassant = null;
}
}
public Piece MovePiece(Position origin, Position destination)
{
// It takes the pieces (now it is lifted up) in origin and in the destination.
Piece pPicked = Gboard.LiftPiece(origin);
// Storing and adding to the hashset of captured pieces if it isn't null.
Piece pCaptured = Gboard.LiftPiece(destination);
if (pCaptured != null)
{
CapturedPieces.Add(pCaptured);
}
// Putting piece in game board and changing the position inside the piece; after, increment the piece's move.
Gboard.PutPiece(pPicked, destination);
pPicked.Positioning = destination;
pPicked.IncrementQtdMoves();
// #SpecialMovement : Castling (1)
if (pPicked is King && destination.Collumn == origin.Collumn + 2)
{
Position rookOrigin = new Position(origin.Line, origin.Collumn + 3);
Position rookDestination = new Position(origin.Line, origin.Collumn + 1);
// It takes the pieces (now it is lifted up) in origin and in the destination.
Piece p = Gboard.LiftPiece(rookOrigin);
Gboard.PutPiece(p, rookDestination);
p.Positioning = rookDestination;
p.IncrementQtdMoves();
}
// #SpecialMovement : Castling (2)
if (pPicked is King && destination.Collumn == origin.Collumn - 2)
{
Position rookOrigin = new Position(origin.Line, origin.Collumn - 4);
Position rookDestination = new Position(origin.Line, origin.Collumn - 1);
// It takes the pieces (now it is lifted up) in origin and in the destination.
Piece p = Gboard.LiftPiece(rookOrigin);
Gboard.PutPiece(p, rookDestination);
p.Positioning = rookDestination;
p.IncrementQtdMoves();
}
// #SpecialMovement : En passant
if (pPicked is Pawn)
{
if (origin.Collumn != destination.Collumn && pCaptured == null)
{
Position posPawn;
if (pPicked.Color == Color.White)
{
posPawn = new Position(destination.Line + 1, destination.Collumn);
}
else
{
posPawn = new Position(destination.Line - 1, destination.Collumn);
}
pCaptured = Gboard.LiftPiece(posPawn);
if (pCaptured != null)
{
CapturedPieces.Add(pCaptured);
}
}
}
return(pCaptured);
}