private void PawnPossibleMoves(int Y, int X, PictureBox[][] board, List <PictureBox> PossiblePieceToTake, bool turn, ChessBoard.pieceName sourcePieceType)
{
if (turn)
{
if (Y - 1 >= 0)
{
if (board[Y - 1][X] == null)
{
gObject.FillRectangle(brush, PieceDetails.ToCoordinate(X), PieceDetails.ToCoordinate(Y - 1), sizeOfBox, sizeOfBox);
}
if (X - 1 >= 0 && board[Y - 1][X - 1] != null && !PieceDetails.IsPieceBlackorWhite(board[Y - 1][X - 1].Name))
{
PossiblePieceToTake.Add(board[Y - 1][X - 1]);
board[Y - 1][X - 1].BackColor = backcolor;
}
if (X + 1 < 8 && board[Y - 1][X + 1] != null && !PieceDetails.IsPieceBlackorWhite(board[Y - 1][X + 1].Name))
{
PossiblePieceToTake.Add(board[Y - 1][X + 1]);
board[Y - 1][X + 1].BackColor = backcolor;
}
}
if (Y == 6 && Y - 2 >= 0 && board[Y - 2][X] == null && board[Y - 1][X] == null)
{
gObject.FillRectangle(brush, PieceDetails.ToCoordinate(X), PieceDetails.ToCoordinate(Y - 2), sizeOfBox, sizeOfBox);
}
}
else
{
if (Y + 1 < 8)
{
if (board[Y + 1][X] == null)
{
gObject.FillRectangle(brush, PieceDetails.ToCoordinate(X), PieceDetails.ToCoordinate(Y + 1), sizeOfBox, sizeOfBox);
}
if (X - 1 >= 0 && board[Y + 1][X - 1] != null && PieceDetails.IsPieceBlackorWhite(board[Y + 1][X - 1].Name))
{
PossiblePieceToTake.Add(board[Y + 1][X - 1]);
board[Y + 1][X - 1].BackColor = backcolor;
}
if (X + 1 < 8 && board[Y + 1][X + 1] != null && PieceDetails.IsPieceBlackorWhite(board[Y + 1][X + 1].Name))
{
PossiblePieceToTake.Add(board[Y + 1][X + 1]);
board[Y + 1][X + 1].BackColor = backcolor;
}
}
if (Y == 1 && Y + 2 < 8 && board[Y + 2][X] == null && board[Y + 1][X] == null)
{
gObject.FillRectangle(brush, PieceDetails.ToCoordinate(X), PieceDetails.ToCoordinate(Y + 2), sizeOfBox, sizeOfBox);
}
}
}
private void KnightPossibleMoves(int Y, int X, PictureBox[][] board, List <PictureBox> PossiblePieceToTake, bool turn, ChessBoard.pieceName sourcePieceType)
{
foreach (int[] dir in PieceDetails.KnightDirection)
{
if ((dir[0] < 0 ? Y + dir[0] >= 0 : Y + dir[0] < 8) && (dir[1] < 0 ? X + dir[1] >= 0 : X + dir[1] < 8))
{
if (board[Y + dir[0]][X + dir[1]] == null)
{
gObject.FillRectangle(brush, PieceDetails.ToCoordinate(X + dir[1]), PieceDetails.ToCoordinate(Y + dir[0]), sizeOfBox, sizeOfBox);
}
else if ((turn && !PieceDetails.IsPieceBlackorWhite(board[Y + dir[0]][X + dir[1]].Name)) || (!turn && PieceDetails.IsPieceBlackorWhite(board[Y + dir[0]][X + dir[1]].Name)))
{
gObject.FillRectangle(brush, PieceDetails.ToCoordinate(X + dir[1]), PieceDetails.ToCoordinate(Y + dir[0]), sizeOfBox, sizeOfBox);
PossiblePieceToTake.Add(board[Y + dir[0]][X + dir[1]]);
board[Y + dir[0]][X + dir[1]].BackColor = backcolor;
}
}
}
}
private void BishopPossibleMoves(int y, int x, PictureBox[][] board, List <PictureBox> PossiblePieceToTake, bool turn, ChessBoard.pieceName sourcePieceType)
{
bool[] pieceDirection = new bool[4]; // this array represents northeast, southeast, southwest, northwest and will reduce the processing time
for (int i = 1; i < 8; i++)
{
// bishop cannot move anymore as it is either out of bound or there is another piece blocking it from its target
if (PieceDetails.checkedAllDirections(pieceDirection))
{
break;
}
for (int j = 0; j < PieceDetails.BishopDirection.Length; j++)
{
if (pieceDirection[j])
{
continue;
}
int Y = y + i * PieceDetails.BishopDirection[j][0];
int X = x + i * PieceDetails.BishopDirection[j][1];
if (Y < 0 || Y > 7 || X < 0 || X > 7)
{
pieceDirection[j] = true;
}
else if (board[Y][X] == null)
{
gObject.FillRectangle(brush, PieceDetails.ToCoordinate(X), PieceDetails.ToCoordinate(Y), sizeOfBox, sizeOfBox);
}
else if ((turn && !PieceDetails.IsPieceBlackorWhite(board[Y][X].Name)) || (!turn && PieceDetails.IsPieceBlackorWhite(board[Y][X].Name)))
{
PossiblePieceToTake.Add(board[Y][X]);
board[Y][X].BackColor = backcolor;
pieceDirection[j] = true;
}
else
{
pieceDirection[j] = true;
}
}
}
}
private void KingPossibleMoves(int Y, int X, PictureBox[][] board, List <PictureBox> PossiblePieceToTake, bool turn, ChessBoard.pieceName sourcePieceType)
{
for (int i = -1; i <= 1; i++)
{
for (int j = -1; j <= 1; j++)
{
if ((i == 0 && j == 0) || Y + i >= 8 || Y + i < 0 || X + j >= 8 || X + j < 0)
{
continue;
}
if (board[Y + i][X + j] == null)
{
gObject.FillRectangle(brush, PieceDetails.ToCoordinate(X + j), PieceDetails.ToCoordinate(Y + i), sizeOfBox, sizeOfBox);
}
else if ((turn && !PieceDetails.IsPieceBlackorWhite(board[Y + i][X + j].Name)) || (!turn && PieceDetails.IsPieceBlackorWhite(board[Y + i][X + j].Name)))
{
PossiblePieceToTake.Add(board[Y + i][X + j]);
board[Y + i][X + j].BackColor = backcolor;
}
}
}
}
