/// <summary>
/// Takes back (undo) the move. Nothing is done to verify if undoing the move is actually
/// valid for the board associated to this move.
/// </summary>
private void PawnPromotionUnExecute(Board board)
{
board.RemoveFromHistory();
board.PlacePiece(m_to, m_piece);
board.MovePiece(m_to, m_from);
board.PlacePiece(m_to, m_capture);
board.State = m_beforeState;
}
/// <summary>
/// Takes back (undo) the move. Nothing is done to verify if undoing the move is actually
/// valid for the board associated to this move.
/// </summary>
public virtual void UnExecute()
{
m_board.RemoveFromHistory();
m_board.MovePiece(m_to, m_from);
m_board.PlacePiece(m_to, m_capture);
m_board.State = m_beforeState;
}
/// <summary>
/// Takes back (undo) the En-Passant capture move. Nothing is done to verify if undoing the move is actually
/// valid for the board associated to this move.
/// </summary>
private void EnPassantUnExecute(Board board)
{
board.RemoveFromHistory();
board.MovePiece(m_to, m_from);
board.PlacePiece(m_beforeState.EnPassantTarget, m_capture);
board.State = m_beforeState;
}
/// <summary>
/// Performs the move. I move is only pseudo legal (putting own king in check)
/// the move isn't executed.
/// </summary>
/// <returns>True if move could be carried out, false otherwise.</returns>
private bool EnPassantExecute(Board board)
{
BoardState afterState = m_beforeState = board.State;
board.PlacePiece(m_beforeState.EnPassantTarget, Piece.None);
board.MovePiece(m_from, m_to);
SetCastlingAvailabilety(ref afterState);
SetEnPassentTarget(ref afterState);
EndTurn(ref afterState);
board.State = afterState;
board.AddToHistory();
if (board.IsCheck(m_beforeState.ColorToPlay))
{
EnPassantUnExecute(board);
return(false);
}
return(true);
}
/// <summary>
/// Takes back (undo) the move. Nothing is done to verify if undoing the move is actually
/// valid for the board associated to this move.
/// </summary>
private void StandardUnExecute(Board board)
{
board.RemoveFromHistory();
board.MovePiece(m_to, m_from);
board.PlacePiece(m_to, m_capture);
board.State = m_beforeState;
}
/// <summary>
/// Performs the move. I move is only pseudo legal (putting own king in check)
/// the move isn't executed.
/// </summary>
/// <returns>True if move could be carried out, false otherwise.</returns>
private bool PawnPromotionExecute(Board board)
{
BoardState afterState = m_beforeState = board.State;
board.MovePiece(m_from, m_to);
board.PlacePiece(m_to, m_promoteTo);
SetCastlingAvailabilety(ref afterState);
SetEnPassentTarget(ref afterState);
EndTurn(ref afterState);
board.State = afterState;
board.AddToHistory();
if (board.IsCheck(m_beforeState.ColorToPlay))
{
PawnPromotionUnExecute(board);
return false;
}
return true;
}
/// <summary>
/// Takes back (undo) the En-Passant capture move. Nothing is done to verify if undoing the move is actually
/// valid for the board associated to this move.
/// </summary>
private void EnPassantUnExecute(Board board)
{
board.RemoveFromHistory();
board.MovePiece(m_to, m_from);
board.PlacePiece(m_beforeState.EnPassantTarget, m_capture);
board.State = m_beforeState;
}
