public bool isThreatened(int row, int col, Piece.Colour threatenedBy, Piece[,] board)
{
bool threatened = false;
List<int[]> covered = new List<int[]>();
List<int[]> filler = new List<int[]>();
for (int rows = 0; rows < Board.Rows; rows++)
{
for (int cols = 0; cols < Board.Cols; cols++)
{
if (board[rows, cols].PieceColour == threatenedBy)
{
thm.highlightThreatened(board[rows, cols], rows, cols, covered, filler, board, false);
}
}
}
foreach (int[] pair in covered)
{
if (pair[0] == row && pair[1] == col)
{
threatened = true;
break;
}
}
return threatened;
}
private void SetPiece(Piece piece, Player player, int letter, int number)
{
// if a thread called this, invoke recursion
if (this.InvokeRequired)
{
this.Invoke(new Action(() => SetPiece(piece, player, letter, number)));
return;
}
// out of bounds
if (letter < 0 || letter > 7 || number < 0 || number > 7)
return; // throw new IndexOutOfRangeException("Chess board letter or number out of range");
// clear tile
if (piece == Piece.NONE)
{
Board[number][letter].Image = null;
Board[number][letter].Invalidate();
return;
}
// update our render
Board[number][letter].Image = graphics.Pieces[player][piece];
Board[number][letter].Invalidate();
}
void rookThreatenHighlight(Piece.Colour colour, int row, int col, List<int[]> threatened, Piece[,] board)
{
int i = 1;
//check down
while (addThreatened(colour, row, col, i, 0, threatened))
{
if (board[row + i, col].Exists)
break;
i++;
}
//check up
i = 1;
while (addThreatened(colour, row, col, -i, 0, threatened))
{
if (board[row - i, col].Exists)
break;
i++;
}
//check right
i = 1;
while (addThreatened(colour, row, col, 0, i, threatened))
{
if (board[row, col + i].Exists)
break;
i++;
}
//check left
i = 1;
while (addThreatened(colour, row, col, 0, -i, threatened))
{
if (board[row, col - i].Exists)
break;
i++;
}
}
void bishopThreatenHighlight(string colour, int row, int col, List<int[]> threatened, Piece[,] board)
{
int i = 1;
//check down right
while (addThreatened(colour, row, col, i, i, threatened))
{
if (board[row + i, col + i].Exists)
break;
i++;
}
//check up right
i = 1;
while (addThreatened(colour, row, col, -i, i, threatened))
{
if (board[row - i, col + i].Exists)
break;
i++;
}
//check up left
i = 1;
while (addThreatened(colour, row, col, -i, -i, threatened))
{
if (board[row - i, col - i].Exists)
break;
i++;
}
//check down left
i = 1;
while (addThreatened(colour, row, col, i, -i, threatened))
{
if (board[row + i, col - i].Exists)
break;
i++;
}
}
public void performEnPassant(int row, int col, Piece[,] Playfield)
{
if (row == 2)
Playfield[3, col] = new Piece();
if (row == 5)
Playfield[4, col] = new Piece();
}
public void checkForCheck(Piece[,] board, Piece.Colour colour)
{
if (cf.isThreatened(uf.FindKing(uf.OtherColour(colour), board), colour, board))
df.Check();
else
df.Clear();
}
void addTaken(Piece piece, Piece[,] takenGrid, int[] takenIndeces)
{
takenGrid[takenIndeces[0], takenIndeces[1]] = piece;
takenIndeces[1]++;
takenIndeces[0] += takenIndeces[1] / 2;
takenIndeces[1] %= 2;
}
public void performEnPassant(int row, int col, Piece[,] Playfield)
{
if (row == Board.FirstRow + 2)
Playfield[Board.FirstRow + 3, col] = new Piece();
if (row == Board.LastRow - 2)
Playfield[Board.LastRow - 3, col] = new Piece();
}
void pawnThreatenHighlight(Piece piece, int row, int col, List<int[]> threatened, Piece[,] board, List<int[]> enPassant)
{
//capturing
if (piece.PieceColour == Piece.Colour.Black)
{
addThreatened(piece.PieceColour, piece.Row, piece.Col, 1, 1, threatened);
addThreatened(piece.PieceColour, piece.Row, piece.Col, 1, -1, threatened);
}
if (piece.PieceColour == Piece.Colour.White)
{
addThreatened(piece.PieceColour, piece.Row, piece.Col, -1, 1, threatened);
addThreatened(piece.PieceColour, piece.Row, piece.Col, -1, -1, threatened);
}
//en passant
if (piece.PieceColour == Piece.Colour.Black)
{
addEnPassant(piece.PieceColour, piece.Row, piece.Col, 1, 1, enPassant, board);
addEnPassant(piece.PieceColour, piece.Row, piece.Col, 1, -1, enPassant, board);
}
if (piece.PieceColour == Piece.Colour.White)
{
addEnPassant(piece.PieceColour, piece.Row, piece.Col, -1, 1, enPassant, board);
addEnPassant(piece.PieceColour, piece.Row, piece.Col, -1, -1, enPassant, board);
}
}
// Copy-constructor
public Piece(Piece origin)
{
this.empty = origin.empty;
this.team = origin.team;
this.type = origin.type;
this.row = origin.row;
this.column = origin.column;
}
public PieceMove(Piece piece, Square target, Piece capturedPiece = null)
{
this.Piece = piece;
this.Source = piece.Square;
this.Target = target;
this.CanCapture = true;
this.CapturedPiece = capturedPiece ?? this.Board[target];
}
public void TakeTurn(Piece[,] board, Piece[,] WhiteTaken, Piece[,] BlackTaken, int[] whiteTakenIndeces, int[] blackTakenIndeces, int depth)
{
topNode = new MoveNode(board);
think(depth, topNode);
bool mate = false;
AvailableMove move = selectMove(allMovesList, board, ref mate, currentColour);
if (!mate)
makeMove(move, board, WhiteTaken, BlackTaken, whiteTakenIndeces, blackTakenIndeces);
}
void addEnPassant(string colour, int row, int col, int rowOffset, int colOffset, List<int[]> enPassant, Piece[,] board)
{
int destinationRow = row + rowOffset;
int destinationCol = col + colOffset;
if (destinationRow >= 0 && destinationRow <= 7 && destinationCol >= 0 && destinationCol <= 7 && board[row, col + colOffset].EnPassant)
{
enPassant.Add(new int[] { destinationRow, destinationCol });
}
}
internal static Image GetSquareImage(Square square, Piece piece = null)
{
if (piece == null)
return boardImageCache["Empty"][square.GetSquareColor()];
var squareColor = square.GetSquareColor();
var key = piece.Player + piece.GetType().Name;
return boardImageCache[key][squareColor];
}
public List<Tuple<int, int>> Rules(Piece currentPiece, Gameboard gameboard)
{
this.moves_dia = get_diagonal.Rules(currentPiece, gameboard);
this.moves_str = get_straight.Rules(currentPiece, gameboard);
moves_str = moves_str.Concat(moves_dia).ToList();
return moves_str;
}
public void AddPiece(Piece piece, BoardCoordinate moveTarget)
{
if (piece == null)
throw new ArgumentNullException("piece");
if (!moveTarget.IsCoordinateValidForBoardSize(_boardSize))
throw new ArgumentException("moveTarget");
SetPiece(piece, moveTarget);
}
public Piece(Piece piece)
{
Colour = piece.Colour;
Type = piece.Type;
Exists = piece.Exists;
HasMoved = piece.HasMoved;
EnPassant = piece.EnPassant;
Row = piece.Row;
Col = piece.Col;
}
public List<Tuple<int, int>> Rules(Piece current_piece, Gameboard gameboard)
{
this.gameboard = gameboard;
this.current_piece = current_piece;
if (current_piece.column > min && current_piece.row > min + 1)
{
next_piece = gameboard.getPiece(current_piece.row - 2, current_piece.column - 1);
if (next_piece.empty == true || next_piece.team != current_piece.team)
valid_destinations.Add(new Tuple<int, int>(current_piece.row - 2, current_piece.column - 1)); // up left
}
if (current_piece.column < max && current_piece.row > min + 1)
{
Piece next_piece = gameboard.getPiece(current_piece.row - 2, current_piece.column + 1);
if (next_piece.empty == true || next_piece.team != current_piece.team)
valid_destinations.Add(new Tuple<int, int>(current_piece.row -2, current_piece.column + 1)); // up right
}
if (current_piece.column < max - 1 && current_piece.row > min)
{
Piece next_piece = gameboard.getPiece(current_piece.row - 1, current_piece.column + 2);
if (next_piece.empty == true || next_piece.team != current_piece.team)
valid_destinations.Add(new Tuple<int, int>(current_piece.row - 1, current_piece.column + 2)); // right up
}
if (current_piece.column < max - 1 && current_piece.row < max)
{
Piece next_piece = gameboard.getPiece(current_piece.row + 1, current_piece.column + 2);
if (next_piece.empty == true || next_piece.team != current_piece.team)
valid_destinations.Add(new Tuple<int, int>(current_piece.row + 1, current_piece.column + 2)); // right down
}
if (current_piece.column < max && current_piece.row < max - 1)
{
Piece next_piece = gameboard.getPiece(current_piece.row + 2, current_piece.column + 1);
if (next_piece.empty == true || next_piece.team != current_piece.team)
valid_destinations.Add(new Tuple<int, int>(current_piece.row + 2, current_piece.column + 1)); // down right
}
if (current_piece.column > min && current_piece.row < max - 1)
{
Piece next_piece = gameboard.getPiece(current_piece.row + 2, current_piece.column - 1);
if (next_piece.empty == true || next_piece.team != current_piece.team)
valid_destinations.Add(new Tuple<int, int>(current_piece.row + 2, current_piece.column - 1)); // down left
}
if (current_piece.column > min + 1 && current_piece.row < max)
{
Piece next_piece = gameboard.getPiece(current_piece.row + 1, current_piece.column - 2);
if (next_piece.empty == true || next_piece.team != current_piece.team)
valid_destinations.Add(new Tuple<int, int>(current_piece.row + 1, current_piece.column - 2)); // left down
}
if (current_piece.column > min + 1 && current_piece.row > min)
{
Piece next_piece = gameboard.getPiece(current_piece.row - 1, current_piece.column - 2);
if (next_piece.empty == true || next_piece.team != current_piece.team)
valid_destinations.Add(new Tuple<int, int>(current_piece.row - 1, current_piece.column - 2)); // left up
}
return valid_destinations;
}
public Piece.Colour OtherColour(Piece.Colour colour)
{
Piece.Colour otherColour;
if (colour == Piece.Colour.Black)
otherColour = Piece.Colour.White;
else if (colour == Piece.Colour.White)
otherColour = Piece.Colour.Black;
else
otherColour = Piece.Colour.Empty;
return otherColour;
}
//Methods
public void AddTaken(Piece piece, Piece[,] whiteTaken, Piece[,] blackTaken, int[] whiteTakenIndeces, int[] blackTakenIndeces)
{
if (piece.PieceColour == Piece.Colour.White)
{
addTaken(piece, whiteTaken, whiteTakenIndeces);
}
if (piece.PieceColour == Piece.Colour.Black)
{
addTaken(piece, blackTaken, blackTakenIndeces);
}
}
public Promotion(int row, ref Piece.Type promoteTo)
{
cvm = new ChessVM();
InitializeComponent();
if (row == 0)
{
imgWhiteBishop.Visibility = Visibility.Visible;
imgWhiteKnight.Visibility = Visibility.Visible;
imgWhiteQueen.Visibility = Visibility.Visible;
imgWhiteRook.Visibility = Visibility.Visible;
}
}
private void up_right_function()
{
next_piece = gameboard.getPiece(current_piece.row - 1, current_piece.column + 1);
while (next_piece.team != current_piece.team)
{
valid_destinations.Add(new Tuple<int, int>(next_piece.row, next_piece.column));
if (next_piece.row - 1 < min || next_piece.column + 1 > max || next_piece.team != (int)team.none)
break;
next_piece = gameboard.getPiece(next_piece.row - 1, next_piece.column + 1);
}
}
public void InitializePlayfield(ref bool isWhiteTurn, ref bool isGameDone,
List<int[]> highlight, Piece[,] playfield, Piece[,] whiteTaken,
Piece[,] blackTaken, ref int[] whiteTakenIndeces, ref int[] blackTakenIndeces)
{
//reseting parameters
df.Clear();
isWhiteTurn = true;
isGameDone = false;
highlight.Clear();
whiteTakenIndeces = new int[] { 0, 0 };
blackTakenIndeces = new int[] { 0, 0 };
for (int row = 0; row < Board.Rows; row++)
{
for (int col = 0; col < Board.Cols; col++)
{
//set piece type
playfield[row, col] = new Piece() { Row = row, Col = col };
if (row == Board.FirstRow || row == Board.LastRow)
{
if (col == Board.FirstCol || col == Board.LastCol)
playfield[row, col].PieceType = Piece.Type.Rook;
if (col == Board.FirstCol + 1 || col == Board.LastCol - 1)
playfield[row, col].PieceType = Piece.Type.Knight;
if (col == Board.FirstCol + 2 || col == Board.LastCol - 2)
playfield[row, col].PieceType = Piece.Type.Bishop;
if (col == Board.FirstCol + 3)
playfield[row, col].PieceType = Piece.Type.Queen;
if (col == Board.FirstCol + 4)
playfield[row, col].PieceType = Piece.Type.King;
}
if (row == Board.FirstRow + 1 || row == Board.LastRow - 1)
playfield[row, col].PieceType = Piece.Type.Pawn;
//set piece color
//all pieces in the top two rows are black
if (row <= Board.FirstRow + 1)
playfield[row, col].PieceColour = Piece.Colour.Black;
//all pieces in the bottom two rows are white
if (row >= Board.LastRow - 1)
playfield[row, col].PieceColour = Piece.Colour.White;
//set those pieces to existing
if (row <= Board.FirstRow + 1 || row >= Board.LastRow - 1)
playfield[row, col].Exists = true;
}
//Reset the taken grids
for (int col = 0; col < 2; col++)
{
whiteTaken[row, col] = new Piece();
blackTaken[row, col] = new Piece();
}
}
}
private void check_right_function()
{
// Console.WriteLine("inne i check right");
next_piece = gameboard.getPiece(current_piece.row, current_piece.column + 1);
while (next_piece.team != current_piece.team)
{
valid_destinations.Add(new Tuple<int, int>(next_piece.row, next_piece.column));
if (next_piece.column + 1 > max || next_piece.team != (int)team.none)
break;
next_piece = gameboard.getPiece(next_piece.row, next_piece.column + 1);
}
}
private void check_down_function()
{
// Console.WriteLine("inne i check down");
next_piece = gameboard.getPiece(current_piece.row + 1, current_piece.column);
while (next_piece.team != current_piece.team)
{
valid_destinations.Add(new Tuple<int, int>(next_piece.row, next_piece.column));
//Console.WriteLine("Added: {0},{1} as valid coordinate.", next_piece.row, next_piece.column);
if (next_piece.row + 1 > max || next_piece.team != (int)team.none)
break;
next_piece = gameboard.getPiece(next_piece.row + 1, next_piece.column);
}
}
public static bool ParseLine(String line, out String message)
{
string placingPattern = "^([KQBNRP])([ld])([a-h, A-H][1-8])$";
string movingPattern = "^([a-h,A-H][1-8])\\s([a-h,A-H][1-8])$";
string doubleMovePattern = "^([a-h,A-H][1-8])\\s([a-h,A-H][1-8])\\s([a-h,A-H][1-8])\\s([a-h,A-H][1-8])$";
message = "";
if (Regex.IsMatch(line, placingPattern))
{
char piece = line.ElementAt(0);
char color = line.ElementAt(1);
char rank = line.ElementAt(2);
char file = line.ElementAt(3);
Piece p = new Piece(piece, color);
message = string.Concat("Place the ", p.GetColor(), " ", p.GetPieceType(), " at ", rank, file, "\n");
validPlacements.Add(line);
return true;
}
else if (Regex.IsMatch(line, movingPattern))
{
char startingRank = line.ElementAt(0);
char startingFile = line.ElementAt(1);
char endingRank = line.ElementAt(3);
char endingFile = line.ElementAt(4);
message = string.Concat("Move the piece at ", startingRank, startingFile, " to ", endingRank, endingFile, "\n");
validMoves.Add(line);
return true;
}
else if (Regex.IsMatch(line, doubleMovePattern))
{
char firstStartingRank = line.ElementAt(0);
char firstStartingFile = line.ElementAt(1);
char firstEndingRank = line.ElementAt(3);
char firstEndingFile = line.ElementAt(4);
char secondStartingRank = line.ElementAt(6);
char secondStartingFile = line.ElementAt(7);
char secondEndingRank = line.ElementAt(9);
char secondEndingFile = line.ElementAt(10);
message = string.Concat("Move the piece at ", firstStartingRank, firstStartingFile, " to ", firstEndingRank, firstEndingFile, " and the piece at ", secondStartingRank, secondStartingFile, " to ", secondEndingRank, secondEndingFile,"\n");
validMoves.Add(line);
return true;
}
else if (!Regex.IsMatch(line, "^($)"))
{
PrintInfo(line, "This line is invalid input.");
return false;
}
return false;
}
public Piece[,] MergeBackgrounds(Piece[,] background, Piece[,] pattern)
{
Piece[,] merge = new Piece[8, 8];
for (int i = 0; i < 8; i++)
{
for (int j = 0; j < 8; j++)
{
if (pattern[j, i] != null)
merge[j, i] = pattern[j, i];
else merge[j, i] = background[j, i];
}
}
return merge;
}
public string GetImageFile(Piece piece, int row, int col)
{
//Change this line to match the project name
string fileName = "pack://application:,,,/Chess;component/Images/";
if (piece.Exists)
{
fileName += piece.Colour;
fileName += piece.Type;
}
if (row % 2 == col % 2)
fileName += "Light.png";
else
fileName += "Dark.png";
return fileName;
}
bool addMoveable(int row, int col, int rowOffset, int colOffset, List<int[]> moveable, Piece[,] board)
{
bool added = false;
int destinationRow = row + rowOffset;
int destinationCol = col + colOffset;
if (uf.IsInBounds(destinationRow, destinationCol))
{
if (board[destinationRow, destinationCol].Colour != board[row, col].Colour && !cf.createCheck(row, col, destinationRow, destinationCol, board))
{
moveable.Add(new int[] { destinationRow, destinationCol });
added = true;
}
}
return added;
}
void pawnMoveHighlight(Piece piece, int row, int col, List<int[]> moveable, Piece[,] board)
{
//moving
if (piece.PieceColour == Piece.Colour.Black && !board[row + 1, col].Exists)
{
addMoveable(piece.Row, piece.Col, 1, 0, moveable, board);
if (!piece.HasMoved && !board[piece.Row + 2, piece.Col].Exists)
addMoveable(piece.Row, piece.Col, 2, 0, moveable, board);
}
if (piece.PieceColour == Piece.Colour.White && !board[row - 1, col].Exists)
{
addMoveable(piece.Row, piece.Col, -1, 0, moveable, board);
if (!piece.HasMoved && !board[piece.Row - 2, piece.Col].Exists)
addMoveable(piece.Row, piece.Col, -2, 0, moveable, board);
}
}
private Texture PieceTexture(Piece piece)
{
return(piece.Owner == Piece.Colour.White
? Resources.WhitePieces[piece.Type]
: Resources.BlackPieces[piece.Type]);
}
private bool CanMove(Position position)
{
Piece piece = Board.Piece(position);
return(piece == null || piece.Color != Color);
}
/*********************************************************************
* ButtonClick
* Handles the button click for each space of the board
*********************************************************************/
public void ButtonClick(object sender, MouseEventArgs e)
{
Space thisButton = ((Space)sender);
//MessageBox.Show(whiteTeam[0].GetRow().ToString() + " " + whiteTeam[0].GetColumn().ToString());
if (!gameOver)
{
// Check if it was a right mouse click
if (e.Button == MouseButtons.Right)
{
// if this was the selected space then we unselect it
if (selected != null && thisButton.GetPiece() == selected)
{
selected = null;
thisButton.ForeColor = thisButton.GetPiece().GetTextColor();
ClearPossible();
return;
}
}
// left mouse click
else
{
// if there isn't a piece selected
if (selected == null)
{
// if the place we just clicked on has a piece there
if (thisButton.GetPiece() != null)
{
// if the piece is on our team
if (turn == thisButton.GetPiece().GetTeam())
{
// set this piece as the selected one
selected = thisButton.GetPiece();
if (e.Button == MouseButtons.Right)
{
}
else
{
// calculate all the spots this piece could move to
selected.CalcPossMoves(board);
// if it can't move then we unselect it
if (selected.GetPossMoves().Count == 0)
{
selected = null;
}
// we set the text color to yellow to show which piece is selected
else
{
thisButton.ForeColor = Color.Yellow;
ShowPossibleMoves();
}
}
}
}
}
// if we already had a selected piece
else
{
int row = thisButton.GetRow();
int col = thisButton.GetCol();
// if the selected piece can be moved here then we move it
if (IsPossible(row, col))
{
int fromRow = selected.GetRow();
int fromCol = selected.GetColumn();
MoveTo(fromRow, fromCol, row, col);
ClearPossible();
gameOver = IsCheckMate();
SwitchTurn();
}
}
}
}
}
private bool canMov(Position pos)
{
Piece p = board.piece(pos);
return(p == null || p.collor != collor);
}
private void MouseClick(object sender, MouseEventArgs e)
{
Piece piece = sender as Piece;
if (!FirstMouseClick)
{
if (piece.PiecePosition < BoardSizeC * 2)
{
Image imagn;
if (Global.GlobalCuloare == CuloarePiesa.Negru)
{
imagn = Resources.BK;
}
else
{
imagn = Resources.WK;
}
pieceIdBoard[piece.PiecePosition].Image = imagn;
pieceIdBoard[piece.PiecePosition].SizeMode = System.Windows.Forms.PictureBoxSizeMode.CenterImage;
pieceIdBoard[piece.PiecePosition].PieceName = "Wp";
pieceIdBoard[piece.PiecePosition].PieceValue = 10;
pieceIdBoard[piece.PiecePosition].Enumarare = ++count;
label1.Text = "Selectați modul în care se va deplasa regele";
FirstMouseClick = true;
LastX = piece.Location.X;
LastY = piece.Location.Y;
}
else
{
MessageBox.Show("Piesa de start trebuie să fie așezată pe primele 2 rânduri ale tabelei");
}
}
else
if (e.Button == MouseButtons.Left)
{
if (pieceIdBoard[piece.PiecePosition].Enumarare != 0)
{
MessageBox.Show("Nu aveți voie să selectați de 2 ori aceeași căsuță!");
return;
}
if ((Math.Abs(piece.Location.X - LastX) / 84 == 1 && Math.Abs(piece.Location.Y - LastY) / 84 == 1) ||
(Math.Abs(piece.Location.X - LastX) / 84 == 0 && Math.Abs(piece.Location.Y - LastY) / 84 == 1) ||
(Math.Abs(piece.Location.X - LastX) / 84 == 1 && Math.Abs(piece.Location.Y - LastY) / 84 == 0))
{
if (Culoarea == Color.Yellow)
{
pieceIdBoard[piece.PiecePosition].Enumarare = ++count;
}
else
{
pieceIdBoard[piece.PiecePosition].Enumarare = --negativecount;
}
pieceIdBoard[piece.PiecePosition].BackColor = Culoarea;
LastX = piece.Location.X;
LastY = piece.Location.Y;
}
else
{
MessageBox.Show("Căsuța selectată trebuie să fie legată de căsuța precedent selectată", "Eroare");
}
}
else
if (e.Button == MouseButtons.Right && pornit == 1)
{
if (pieceIdBoard[piece.PiecePosition].Capturare != 0 || pieceIdBoard[piece.PiecePosition].Enumarare == 1)
{
MessageBox.Show("Nu aveți voie să selectați de 2 ori aceeași căsuță!");
return;
}
pieceIdBoard[piece.PiecePosition].BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
pieceIdBoard[piece.PiecePosition].BackColor = Color.FromArgb(255, 213, 0);
pieceIdBoard[piece.PiecePosition].Capturare = ++countt;
}
}
public static Tuple <bool, bool> checkStraightMovement(Piece piece, int x_new, int y_new)
{
// returns 2 data in the variables (move_possible, will kill)
// ensures that it is a straight line
bool move_possible = true;
bool will_kill = false;
if ((piece.x != x_new) && (piece.y != y_new))
{
move_possible = will_kill = false;
Tuple <bool, bool> result = new Tuple <bool, bool>(move_possible, will_kill);
return(result);
}
List <Tuple <int, int> > temp_locations = new List <Tuple <int, int> >();
#region fill temp_locations
for (int y = piece.y; y <= y_new; y++)
{
Tuple <int, int> temp_coords = new Tuple <int, int>(x_new, y);
temp_locations.Add(temp_coords);
}
for (int y = y_new; y <= piece.y; y++)
{
Tuple <int, int> temp_coords = new Tuple <int, int>(x_new, y);
temp_locations.Add(temp_coords);
}
for (int x = piece.x; x <= x_new; x++)
{
Tuple <int, int> temp_coords = new Tuple <int, int>(x, y_new);
temp_locations.Add(temp_coords);
}
for (int x = x_new; x <= piece.x; x++)
{
Tuple <int, int> temp_coords = new Tuple <int, int>(x, y_new);
temp_locations.Add(temp_coords);
}
#endregion
foreach (var i in temp_locations)
{
if (checkPosToPiece(i.Item1, i.Item2))
{
Piece j = (Piece)Board.PosToPiece[i];
if ((j.colour != piece.colour) &&
(j.x == x_new) && (j.y == y_new))
{
will_kill = true;
}
if (
((j.colour == piece.colour) && (j != piece)) ||
((j.colour != piece.colour) && ((j.x != x_new) || (j.y != y_new))))
{
move_possible = will_kill = false;
Tuple <bool, bool> result = new Tuple <bool, bool>(move_possible, will_kill);
return(result);
}
}
}
Tuple <bool, bool> result1 = new Tuple <bool, bool>(move_possible, will_kill);
return(result1);
}
public static bool MateLogic(bool colour)
{
authentication.InCheckLogic(colour);
if (!Board.InCheck)
{
Board.tempData = "not in check";
return(false);
}
if (authentication.KingHasLegalMoves(colour))
{
Board.tempData = "king can move";
return(false);
}
// I simply can't use the algorithm of finding the temp locations of the piece
// which is checking the king and see if one of my pieces can reach those locations
// and hence block, or kill the piece, and then again check for mate, because there might
// be more than 1 piece checking.
// So I'll create a list of pieces which are checking the king. Then I'll create their temporary locations,
// then i'll see if one of my pieces can go to their temporary locations, killing or blocking them, and then again
// check for InCheck. That way everything will be awesome. I need an overloaded InCheckLogic into which I can send a
// changed chessboard. Have to think of an efficient way for that.
List <Tuple <int, int> > tempLocations = new List <Tuple <int, int> >();
#region filling tempLocations
foreach (Piece p in Board.PiecesCheckingKing)
{
switch (p.identifier)
{
case 'p':
case 'P':
// I can only kill pawns, not block them
tempLocations.Add(new Tuple <int, int>(p.x, p.y));
break;
case 'R':
case 'r':
// This includes their own position as well as the path the rook takes
for (int i = Math.Min(p.x, Board.KingInCheck.x); i <= Math.Max(p.x, Board.KingInCheck.x); i++)
{
for (int j = Math.Min(p.y, Board.KingInCheck.y); j <= Math.Max(p.y, Board.KingInCheck.y); j++)
{
tempLocations.Add(new Tuple <int, int>(i, j));
}
}
tempLocations.Remove(new Tuple <int, int>(Board.KingInCheck.x, Board.KingInCheck.y));
break;
case 'b':
case 'B':
// fill in the diagonal locations from piece to king
#region filling in temp locations
int[] x_pos = { 0, 0, 0, 0, 0, 0, 0, 0 };
int[] y_pos = { 0, 0, 0, 0, 0, 0, 0, 0 };
int x_pos_i = 0;
if (p.x < Board.KingInCheck.x)
{
for (int i = p.x; i <= Board.KingInCheck.x; i++)
{
x_pos[x_pos_i] = i;
x_pos_i++;
}
}
else
{
for (int i = p.x; i >= Board.KingInCheck.x; i--)
{
x_pos[x_pos_i] = i;
x_pos_i++;
}
}
int y_pos_i = 0;
if (p.y < Board.KingInCheck.y)
{
for (int i = p.y; i <= Board.KingInCheck.y; i++)
{
y_pos[y_pos_i] = i;
y_pos_i++;
}
}
else
{
for (int i = p.y; i >= Board.KingInCheck.y; i--)
{
y_pos[y_pos_i] = i;
y_pos_i++;
}
}
#endregion
for (int i = 0; i < 8; i++)
{
if (x_pos[i] == 0)
{
break;
}
tempLocations.Add(new Tuple <int, int>(x_pos[i], y_pos[i]));
}
tempLocations.Remove(new Tuple <int, int>(Board.KingInCheck.x, Board.KingInCheck.y));
break;
case 'N':
case 'n':
// I'll have to kill the knights. Can't block them
tempLocations.Add(new Tuple <int, int>(p.x, p.y));
break;
case 'Q':
case 'q':
#region Filling in temporary locations for queen
// check if straight kill or diagnol kill
if ((p.x == Board.KingInCheck.x) || (p.y == Board.KingInCheck.y))
{
for (int i = Math.Min(p.x, Board.KingInCheck.x); i <= Math.Max(p.x, Board.KingInCheck.x); i++)
{
for (int j = Math.Min(p.y, Board.KingInCheck.y); j <= Math.Max(p.y, Board.KingInCheck.y); j++)
{
tempLocations.Add(new Tuple <int, int>(i, j));
}
}
}
else
{
// diagonal kill
int[] xpos = { 0, 0, 0, 0, 0, 0, 0, 0 };
int[] ypos = { 0, 0, 0, 0, 0, 0, 0, 0 };
int xposi = 0;
if (p.x < Board.KingInCheck.x)
{
for (int i = p.x; i <= Board.KingInCheck.x; i++)
{
xpos[xposi] = i;
xposi++;
}
}
else
{
for (int i = p.x; i >= Board.KingInCheck.x; i--)
{
xpos[xposi] = i;
xposi++;
}
}
int yposi = 0;
if (p.y < Board.KingInCheck.y)
{
for (int i = p.y; i <= Board.KingInCheck.y; i++)
{
ypos[yposi] = i;
yposi++;
}
}
else
{
for (int i = p.y; i >= Board.KingInCheck.y; i--)
{
ypos[yposi] = i;
yposi++;
}
}
for (int i = 0; i < 8; i++)
{
if (xpos[i] == 0)
{
break;
}
tempLocations.Add(new Tuple <int, int>(xpos[i], ypos[i]));
}
}
#endregion
tempLocations.Remove(new Tuple <int, int>(Board.KingInCheck.x, Board.KingInCheck.y));
break;
}
}
#endregion
// so that changing PosToPiece does not raise exception
List <Piece> temp_pieces = Board.PosToPiece.Values.Cast <Piece>().ToList();
foreach (Piece piece in temp_pieces)
{
if (piece.colour == colour)
{
foreach (Tuple <int, int> pos in tempLocations)
{
if (piece.check(pos.Item1, pos.Item2))
{
Piece original_piece = null;
// checks that its not check till now
// creating a new representation doesn't work as still piece.check uses the PosToPiece
// also instead of modifying all the piece functions with optional arguments,
// I'll modify the PosToPiece itself and correct it before the function returns
/*
* System.Collections.Hashtable tempBoardRepresentation = (System.Collections.Hashtable)Board.PosToPiece.Clone();
* tempBoardRepresentation.Remove(new Tuple<int, int>(piece.x, piece.y));
* tempBoardRepresentation[new Tuple<int, int>(pos.Item1, pos.Item2)] = piece;
* if (authentication.InCheckLogic(tempBoardRepresentation) == false)
*/
Tuple <int, int> actual_coordinates = new Tuple <int, int>(piece.x, piece.y);
Board.PosToPiece.Remove(actual_coordinates);
// simply doing this would overwrite an already existing piece with a temporary piece,
// thus causing a piece to be lost forever. In short -- killing.
// Board.PosToPiece[new Tuple<int, int>(pos.Item1, pos.Item2)] = piece;
// so
if (authentication.checkPosToPiece(pos.Item1, pos.Item2))
{
if (piece.check(pos.Item1, pos.Item2))
{
original_piece = (Piece)Board.PosToPiece[pos];
}
}
Board.PosToPiece[new Tuple <int, int>(pos.Item1, pos.Item2)] = piece;
piece.x = pos.Item1;
piece.y = pos.Item2;
if (authentication.InCheckLogic() == false)
{
Board.tempData = "SOMEONE CAN BLOCK.!!";
//correct the board representation
Board.PosToPiece.Remove(new Tuple <int, int>(piece.x, piece.y));
Board.PosToPiece[new Tuple <int, int>(actual_coordinates.Item1, actual_coordinates.Item2)] = piece;
piece.x = actual_coordinates.Item1;
piece.y = actual_coordinates.Item2;
//Console.WriteLine("SOMEONE CAN KILL");
if (original_piece != null)
{
Board.PosToPiece[pos] = original_piece;
}
return(false);
}
//correct the board representation
Board.PosToPiece.Remove(new Tuple <int, int>(piece.x, piece.y));
Board.PosToPiece[new Tuple <int, int>(actual_coordinates.Item1, actual_coordinates.Item2)] = piece;
piece.x = actual_coordinates.Item1;
piece.y = actual_coordinates.Item2;
if (original_piece != null)
{
Board.PosToPiece[pos] = original_piece;
}
}
}
}
}
Board.tempData = "CHECKMATE..!!";
return(true);
}
public static Tuple <bool, bool> checkDiagonalMovement(Piece piece, int x_new, int y_new)
{
if (piece.x == x_new || piece.y == y_new)
{
return(new Tuple <bool, bool>(false, false));
}
if (Math.Abs(((float)piece.x - (float)x_new) / ((float)piece.y - (float)y_new)) != 1)
{
return(new Tuple <bool, bool>(false, false));
}
List <Tuple <int, int> > tempLocations = new List <Tuple <int, int> >();
#region filling tempLocations
if (x_new > piece.x)
{
if (y_new > piece.y)
{
for (int i = 1; i <= x_new - piece.x; i++)
{
tempLocations.Add(new Tuple <int, int>(piece.x + i, piece.y + i));
}
}
else
{
for (int i = 1; i <= x_new - piece.x; i++)
{
tempLocations.Add(new Tuple <int, int>(piece.x + i, piece.y - i));
}
}
}
else
{
if (y_new > piece.y)
{
for (int i = 1; i <= piece.x - x_new; i++)
{
tempLocations.Add(new Tuple <int, int>(piece.x - i, piece.y + i));
}
}
else
{
for (int i = 1; i <= piece.x - x_new; i++)
{
tempLocations.Add(new Tuple <int, int>(piece.x - i, piece.y - i));
}
}
}
#endregion
bool move_possible = true;
bool will_kill = false;
bool early_break = false;
Tuple <bool, bool> answer;
foreach (var i in tempLocations)
{
if (checkPosToPiece(i.Item1, i.Item2))
{
var j = (Piece)Board.PosToPiece[i];
if ((j.colour != piece.colour) &&
(j.x == x_new) && (j.y == y_new))
{
will_kill = true;
}
else if ((j.colour == piece.colour) ||
(j.colour != piece.colour && (j.x != x_new || j.y != y_new))
)
{
early_break = true;
break;
}
}
}
if (early_break)
{
answer = new Tuple <bool, bool>(false, false);
}
else
{
answer = new Tuple <bool, bool>(move_possible, will_kill);
}
return(answer);
}
private bool HasEnemy(Position pos)
{
Piece p = Board.Piece(pos);
return(p != null && p.Color != Color);
}
public override bool canCapture(Piece target)
{
var to = target.Position;
return(Math.Abs(pos.X - to.X) == 1 && to.Y == pos.Y + 1);
}