private eMoveList tryDownValidMove(char[,] i_CheckersBoard, int i_CurrRow, int i_CurrCol, int i_NextRow, int i_NextCol)
{
eMoveList moveType = eMoveList.InvalidMove;
if (i_NextRow - i_CurrRow <= 2 && i_CurrRow < i_NextRow && Math.Abs(i_CurrCol - i_NextCol) <= 2 &&
Math.Abs(i_CurrCol - i_NextCol) > 0 && i_CheckersBoard[i_NextRow, i_NextCol] == ' ')
{
//// 1 skip for regular movement
if (i_NextRow - i_CurrRow == 1 && Math.Abs(i_CurrCol - i_NextCol) == 1)
{
moveType = eMoveList.Move;
}
else
{
//// 2 skips for a "jump" move
if (i_CheckersBoard[i_CurrRow, i_CurrCol] == 'U' || i_CheckersBoard[i_CurrRow, i_CurrCol] == 'O')
{
//// right jump
if (i_CurrRow + 2 == i_NextRow && i_CurrCol + 2 == i_NextCol &&
(i_CheckersBoard[i_CurrRow + 1, i_CurrCol + 1] == 'X' || i_CheckersBoard[i_CurrRow + 1, i_CurrCol + 1] == 'K'))
{
moveType = eMoveList.JumpDownRight;
}
else if (i_CurrRow + 2 == i_NextRow && i_CurrCol - 2 == i_NextCol &&
(i_CheckersBoard[i_CurrRow + 1, i_CurrCol - 1] == 'X' || i_CheckersBoard[i_CurrRow + 1, i_CurrCol - 1] == 'K'))
{
//// left jump
moveType = eMoveList.JumpDownLeft;
}
}
else if (i_CheckersBoard[i_CurrRow, i_CurrCol] == 'K')
{
//// right jump
if (i_CurrRow + 2 == i_NextRow && i_CurrCol + 2 == i_NextCol &&
(i_CheckersBoard[i_CurrRow + 1, i_CurrCol + 1] == 'O' || i_CheckersBoard[i_CurrRow + 1, i_CurrCol + 1] == 'U'))
{
moveType = eMoveList.JumpDownRight;
}
else if (i_CurrRow + 2 == i_NextRow && i_CurrCol - 2 == i_NextCol &&
(i_CheckersBoard[i_CurrRow + 1, i_CurrCol - 1] == 'O' || i_CheckersBoard[i_CurrRow + 1, i_CurrCol - 1] == 'U'))
{
//// left jump
moveType = eMoveList.JumpDownLeft;
}
}
}
}
return(moveType);
}
//// check and return valid move according to current player's checker piece
public eMoveList ReturnMoveType(char i_PlayerPiece, char[,] i_CheckersBoard, int i_CurrRow, int i_CurrCol, int i_nextRow, int i_NextCol)
{
eMoveList moveType = eMoveList.InvalidMove;
if (i_CheckersBoard[i_CurrRow, i_CurrCol] == 'X' && i_PlayerPiece == 'X')
{
moveType = tryUpValidMove(i_CheckersBoard, i_CurrRow, i_CurrCol, i_nextRow, i_NextCol);
}
else if (i_CheckersBoard[i_CurrRow, i_CurrCol] == 'O' && i_PlayerPiece == 'O')
{
moveType = tryDownValidMove(i_CheckersBoard, i_CurrRow, i_CurrCol, i_nextRow, i_NextCol);
}
else if ((i_CheckersBoard[i_CurrRow, i_CurrCol] == 'K' && i_PlayerPiece == 'X') ||
(i_CheckersBoard[i_CurrRow, i_CurrCol] == 'U' && i_PlayerPiece == 'O'))
{
eMoveList moveUp, moveDown;
moveUp = tryUpValidMove(i_CheckersBoard, i_CurrRow, i_CurrCol, i_nextRow, i_NextCol);
moveDown = tryDownValidMove(i_CheckersBoard, i_CurrRow, i_CurrCol, i_nextRow, i_NextCol);
if (moveUp == eMoveList.InvalidMove && moveDown == eMoveList.InvalidMove)
{
moveType = eMoveList.InvalidMove;
}
else if (moveUp == eMoveList.InvalidMove)
{
moveType = moveDown;
}
else
{
moveType = moveUp;
}
}
else
{
//// i_CheckersBoard[i_CurrRow, i_CurrCol] == ' ' (no available piece)
moveType = eMoveList.InvalidMove;
}
return(moveType);
}
//// move type tells us in which direction the piece moves and current location specifies where the piece was before the move
//// erase previous location of piece and update to new location
public void checkersPieceMovement(char[,] i_CheckersBoard, int i_CurrRow, int i_CurrCol, int i_NextRow, int i_NextCol, char i_PlayerPiece, eMoveList i_MoveType)
{
i_CheckersBoard[i_NextRow, i_NextCol] = i_PlayerPiece; // player piece is the checkers piece that the user moves
i_CheckersBoard[i_CurrRow, i_CurrCol] = ' ';
if (i_MoveType.ToString().Contains("Jump"))
{
chessPieceConquer(i_CheckersBoard, i_CurrRow, i_CurrCol, i_MoveType);
}
//// if checkers piece reaches opponent's front line then change it to king accordingly
changeSoldierToKing(i_CheckersBoard, i_NextRow, i_NextCol);
}
//// if jump happened then erase "conquer" opponent's checkers piece
//// move type tells us in which direction the jump occurred and current row/col specifies were we were before the jump
//// we then know the location of the checkers piece to erase
private void chessPieceConquer(char[,] i_CheckersBoard, int i_CurrRow, int i_CurrCol, eMoveList i_MoveType)
{
if (i_MoveType == eMoveList.JumpDownLeft)
{
i_CheckersBoard[i_CurrRow + 1, i_CurrCol - 1] = ' ';
}
else if (i_MoveType == eMoveList.JumpDownRight)
{
i_CheckersBoard[i_CurrRow + 1, i_CurrCol + 1] = ' ';
}
else if (i_MoveType == eMoveList.JumpUpLeft)
{
i_CheckersBoard[i_CurrRow - 1, i_CurrCol - 1] = ' ';
}
else if (i_MoveType == eMoveList.JumpUpRight)
{
i_CheckersBoard[i_CurrRow - 1, i_CurrCol + 1] = ' ';
}
}