public void Remove(Piece piece)
{
_pieces.Remove(piece);
WhitePieces.Remove(piece);
BlackPieces.Remove(piece);
OnPropertyChanged("Pieces");
OnPropertyChanged("WhitePieces");
OnPropertyChanged("BlackPieces");
}
/// <summary>
/// Add a piece to the board, if there already is a piece on the same square then remove the current piece
/// </summary>
/// <param name="piece"></param>
public void AddPiece(Piece piece)
{
// see if there already is a piece at that position
Piece overridenPiece = GetPiece(piece.Position);
if (overridenPiece != null)
{
//this.Remove(overridenPiece);
}
// Add new piece
_pieces.Add(piece);
// Make sure that the black and white pices lists are keeps up to date
if (piece.Side == Globals.Side.Black)
{
BlackPieces.Add(piece);
}
else
{
WhitePieces.Add(piece);
}
}
/// <summary>Constructor using fen string </summary>
/// <see cref="Board"/>
/// <param name="fen">FEN string that will be parsed to a corresponding board position</param>
/// <exception cref="InvalidBoardException">
/// Invlalid strings
/// The fen string is interpeted as an array of string, if the array isn't in the correct length (6)
/// It can and will throw an exception if any of the arguments provided is not by the fen standart
/// </exception>
public Grid(string fen)
{
Board = new Tile[8, 8];
string[] arr = fen.Split(' ');
if (arr.Length != 6)
{
throw new InvalidFENBoardException("FEN string must have six arguments");
}
//Initalize pieces section
string[] boardState = arr[0].Split('/');
for (int i = 0; i < boardState.Length; i++)
{
int xPos = 0;
foreach (char ch in boardState[i])
{
int number;
bool success = int.TryParse(ch.ToString(), out number);
if (success)
{
for (int j = 0; j < number; j++)
{
Board[7 - i, xPos] = new Tile(null, xPos, 7 - i);
xPos++;
}
}
else
{
Piece piece = Piece.PieceIdentifier(ch);
if (piece == null)
{
throw new InvalidFENBoardException("Invalid board state");
}
Board[7 - i, xPos] = new Tile(piece, xPos, 7 - i);
xPos++;
}
}
}
InitPieces();
//initialize currentplayer section
string teamFlag = arr[1];
if (teamFlag.Length != 1)
{
throw new InvalidFENBoardException("Invalid player turn argument");
}
if (teamFlag[0] == 'w')
{
CurrentPlayer = new Player(true);
}
else if (teamFlag[0] == 'b')
{
CurrentPlayer = new Player(false);
}
else
{
throw new InvalidFENBoardException("Invalid player turn argument");
}
//Initialize castling rights section
string castlingRights = arr[2];
if (castlingRights.Length > 4 || castlingRights.Length < 0)
{
throw new InvalidFENBoardException("Invalid castling rights argument");
}
string temp = castlingRights.ToUpper();
foreach (char c in temp)
{
if (c != 'K' && c != 'Q' && c != '-')
{
throw new InvalidFENBoardException("Invalid castling rights argument");
}
}
Piece wKing = WhitePieces.Find(piece => piece is King && piece.IsWhite);
King whiteKing = wKing as King;
if (whiteKing == null)
{
throw new InvalidFENBoardException("Board missing white king");
}
Piece bKing = BlackPieces.Find(piece => piece is King && !piece.IsWhite);
King blackKing = bKing as King;
if (blackKing == null)
{
throw new InvalidFENBoardException("Board missing black king");
}
if (castlingRights == "-")
{
whiteKing.HasMoved = true;
blackKing.HasMoved = true;
}
if (!castlingRights.Contains('K'))
{
whiteKing.kingSideCatlingDone = true;
}
if (!castlingRights.Contains('Q'))
{
whiteKing.queenSideCasltingDone = true;
}
if (!castlingRights.Contains('k'))
{
blackKing.kingSideCatlingDone = true;
}
if (!castlingRights.Contains('q'))
{
blackKing.queenSideCasltingDone = true;
}
//Initialize enpassant section
string enpassant = arr[3];
if (enpassant != "-")
{
if (enpassant.Length != 2)
{
throw new InvalidFENBoardException("En passant argument must be 2 characters long");
}
int row = (int)enpassant[0] - (int)'a';
int col = int.Parse(enpassant[1].ToString());
Tile pawnTile;
if (col == 6)
{
pawnTile = GetTile(row, col - 2);
}
else if (col == 3)
{
pawnTile = GetTile(row, col);
}
else
{
throw new InvalidFENBoardException("En passant argument is invalid");
}
Pawn pawn = pawnTile.Piece as Pawn;
if (pawn == null)
{
throw new InvalidFENBoardException("En passant is invalid");
}
pawn.CanBeCapturedEnPassant = true;
}
//Initialize 50 move rule count
string fiftyMoveRule = arr[4];
int fiftyMoveRuleCount;
bool isInt = int.TryParse(fiftyMoveRule, out fiftyMoveRuleCount);
if (isInt)
{
if (fiftyMoveRuleCount >= 0)
{
FiftyMoveRuleCount = fiftyMoveRuleCount;
}
else
{
throw new InvalidFENBoardException("Fifty move rule argument must be a positive integer");
}
}
else
{
throw new InvalidFENBoardException("Fifty move rule argument must be an integer");
}
//Initialize move count
string FENMoveCount = arr[5];
int moveCount;
isInt = int.TryParse(FENMoveCount, out moveCount);
if (isInt)
{
if (moveCount > 0)
{
MoveCount = moveCount;
}
else
{
throw new InvalidFENBoardException("Move count argument must be greater than 0");
}
}
else
{
throw new InvalidFENBoardException("Move count argument must be an integer");
}
UpdateGameState();
UpdateKilledPieces();
AllBoards.Add(CreateCopyOfBoard());
}
/// <summary>
/// Returns the fen representation of the current board position
/// <see cref="Board"/>
/// </summary>
/// <returns>The corresponding FEN string of the current board position</returns>
public string FEN()
{
//Init board state section
string res = "";
int emptySpacesCount = 0;
for (int i = 7; i >= 0; i--)
{
for (int j = 0; j < 8; j++)
{
Tile tile = GetTile(j, i);
if (tile.Piece != null)
{
if (emptySpacesCount != 0)
{
res += emptySpacesCount;
}
res += tile.Piece.ToString();
emptySpacesCount = 0;
}
else
{
emptySpacesCount++;
}
}
if (emptySpacesCount != 0)
{
res += emptySpacesCount;
}
emptySpacesCount = 0;
res += "/";
}
res = res.TrimEnd('/');
//Init current player section
if (CurrentPlayer.IsWhite)
{
res += " w ";
}
else
{
res += " b ";
}
//Init caslting right position
Piece wKing = WhitePieces.Find(piece => piece is King);
King whiteKing = wKing as King;
if (whiteKing == null)
{
throw new InvalidBoardException("White king is missing");
}
Piece bKing = BlackPieces.Find(piece => piece is King);
King blackKing = bKing as King;
if (blackKing == null)
{
throw new InvalidBoardException("Black king is missing");
}
string castlingRights = "";
if (!whiteKing.HasMoved)
{
if (!whiteKing.kingSideCatlingDone)
{
Rook rightRook = GetTile(7, 0).Piece as Rook;
if (rightRook != null && !rightRook.HasMoved)
{
castlingRights += 'K';
}
}
if (!whiteKing.queenSideCasltingDone)
{
Rook leftRook = GetTile(0, 0).Piece as Rook;
if (leftRook != null && !leftRook.HasMoved)
{
castlingRights += 'Q';
}
}
}
if (!blackKing.HasMoved)
{
if (!blackKing.kingSideCatlingDone)
{
Rook rightRook = GetTile(7, 7).Piece as Rook;
if (rightRook != null && !rightRook.HasMoved)
{
castlingRights += 'k';
}
}
if (!blackKing.queenSideCasltingDone)
{
Rook leftRook = GetTile(0, 7).Piece as Rook;
if (leftRook != null && !leftRook.HasMoved)
{
castlingRights += 'q';
}
}
}
if (whiteKing.HasMoved && blackKing.HasMoved)
{
castlingRights = "-";
}
res += castlingRights + " ";