/// <summary>Is the move legal. This move doesn't check multiple jumps.</summary>
/// <param name="board">the board state</param>
/// <param name="startRow">the start row</param>
/// <param name="startCol">the start col</param>
/// <param name="endRow">the end row</param>
/// <param name="endCol">the end col</param>
/// <param name="player">the player with the turn</param>
/// <returns>LEGAL if the move is legal. Illegal if the move is not legal. INCOMPLETE if the move results in a jump.</returns>
private static MoveStatus IsMoveLegal(IBoard board, int startRow, int startCol, int endRow, int endCol, Player player)
{
if (!InBounds(startRow, startCol, board) || !InBounds(endRow, endCol, board))
{
// out of board bounds
return(MoveStatus.Illegal);
}
Piece startPosition = board[startRow, startCol];
Piece endPosition = board[endRow, endCol];
if ((player == Player.Black && !BoardUtilities.IsBlack(startPosition)) || (player == Player.White && !BoardUtilities.IsWhite(startPosition)))
{
// wrong player attempting to make a move
return(MoveStatus.Illegal);
}
else if (!BoardUtilities.IsEmpty(endPosition))
{// destination is not empty
return(MoveStatus.Illegal);
}
int forwardDirection = (BoardUtilities.IsBlack(startPosition)) ? 1 : -1;
int backwardDirection = (!BoardUtilities.IsKing(startPosition)) ? 0 : (BoardUtilities.IsBlack(startPosition)) ? -1 : 1;
// check for single step along vertical axis
if (Math.Abs(endRow - startRow) == 1)
{//possible walk made
// check if we took a walk when a jump was available
if (CanJump(board, player))
{
return(MoveStatus.Illegal);
}
// one step along the horizontal axis and proper vertical direction movement
// men can't go backwards but kings can
if ((Math.Abs(endCol - startCol) == 1) && (startRow + forwardDirection == endRow || startRow + backwardDirection == endRow))
{
return(MoveStatus.Legal);
}
}
else if (Math.Abs(endRow - startRow) == 2)
{// possible jump made
int jumpedRow = (endRow + startRow) / 2;
int jumpedCol = (endCol + startCol) / 2;
if (BoardUtilities.IsOpponentPiece(player, board[jumpedRow, jumpedCol]))
{
// one step along the horizontal axis and proper vertical direction movement
// men can't go backwards but kings can
if ((Math.Abs(endCol - startCol) == 2) && (startRow + forwardDirection * 2 == endRow || startRow + backwardDirection * 2 == endRow))
{
return(MoveStatus.Incomplete);
}
}
}
return(MoveStatus.Illegal);
}
/// <summary>
/// IsMoveLegal - Это законно
/// Is the move legal. This move doesn't check multiple jumps.
/// Это законный ход. Этот ход не проверяет несколько прыжков.
/// </summary>
/// <param name="board">
/// the board state
/// состояние правления
/// </param>
/// <param name="startRow">
/// the start row
/// начальный ряд
/// </param>
/// <param name="startCol">
/// the start col
/// начальный столб
/// </param>
/// <param name="endRow">
/// the end row
/// конец строки
/// </param>
/// <param name="endCol">
/// the end col
/// конец колонки
/// </param>
/// <param name="player">
/// the player with the turn
/// игрок с поворотом
/// </param>
/// <returns>
/// LEGAL if the move is legal. Illegal if the move is not legal. INCOMPLETE if the move results in a jump.
/// ЗАКОННЫЙ, если движение законно. Незаконный, если движение не законно. НЕПОЛНЫЙ, если движение приводит к скачку.
/// </returns>
private static MoveStatus IsMoveLegal(IBoard board, int startRow, int startCol, int endRow, int endCol, Player player)
{
if (!InBounds(startRow, startCol, board) || !InBounds(endRow, endCol, board))
{
// out of board bounds
//из границ правления
return(MoveStatus.Illegal);
}
Piece startPosition = board[startRow, startCol];
Piece endPosition = board[endRow, endCol];
if ((player == Player.Black && !BoardUtilities.IsBlack(startPosition)) || (player == Player.White && !BoardUtilities.IsWhite(startPosition)))
{
// wrong player attempting to make a move
//неправильный игрок, пытающийся сделать движение
return(MoveStatus.Illegal);
}
else if (!BoardUtilities.IsEmpty(endPosition))
{// destination is not empty
//место назначения не пусто
return(MoveStatus.Illegal);
}
int forwardDirection = (BoardUtilities.IsBlack(startPosition)) ? 1 : -1;
int backwardDirection = (!BoardUtilities.IsKing(startPosition)) ? 0 : (BoardUtilities.IsBlack(startPosition)) ? -1 : 1;
// check for single step along vertical axis
//проверьте на единственный шаг вдоль вертикальной оси
if (Math.Abs(endRow - startRow) == 1)
{//possible walk made
//возможная ходьба сделана
// check if we took a walk when a jump was available
//проверьте, прогулялись ли мы, когда скачок был доступен
if (CanJump(board, player))
{
return(MoveStatus.Illegal);
}
// one step along the horizontal axis and proper vertical direction movement
// один шаг по горизонтальной оси и правильное вертикальное движение
// men can't go backwards but kings can
// люди не могут идти назад, но короли могут
if ((Math.Abs(endCol - startCol) == 1) && (startRow + forwardDirection == endRow || startRow + backwardDirection == endRow))
{
return(MoveStatus.Legal);
}
}
else if (Math.Abs(endRow - startRow) == 2)
{// possible jump made
// возможный прыжок сделан
int jumpedRow = (endRow + startRow) / 2;
int jumpedCol = (endCol + startCol) / 2;
if (BoardUtilities.IsOpponentPiece(player, board[jumpedRow, jumpedCol]))
{
// one step along the horizontal axis and proper vertical direction movement
// один шаг по горизонтальной оси и правильное вертикальное движение
// men can't go backwards but kings can
// люди не могут идти назад, но короли могут
if ((Math.Abs(endCol - startCol) == 2) && (startRow + forwardDirection * 2 == endRow || startRow + backwardDirection * 2 == endRow))
{
return(MoveStatus.Incomplete);
}
}
}
return(MoveStatus.Illegal);
}