/// <summary>
/// Generates the move.
/// </summary>
/// <param name="board">The board</param>
/// <param name="from">The starting square</param>
/// <param name="to">The ending square</param>
/// <returns></returns>
internal override Move GenerateMove(Board board, int from, int to)
{
Move move;
// if it's an en passant capture
if (IsEnPassantCaptureMove(board, from, to))
{
move = new EnPassantCaptureMove(board.Status, from, to);
move.ChangeSideToMove(); // change the side to move
move.SetEnPassantTarget(null); // reset the en passant target
move.ResetPly(); // reset the ply
move.IncrementMoves(); // increment the number of moves
// we need to verify for check
move.Make(board);
bool result = !board.BlackKingInCheck();
move.TakeBack(board);
return(result ? move : null);
}
move = base.GenerateMove(board, from, to);
if (move != null)
{
move.ResetPly();// reset the ply
// if it's the two-squares move
if (IsTwoSquaresMove(board, from, to))
{
// set the en passant target
move.SetEnPassantTarget(to - Board.SideSquareNo);
}
// if it's a promotion
if (Board.Rank(to) == Board.SideSquareNo - 1)
{
// we don't need to verify for check again
// so the promotion delegate will not be triggered
// later we will change the promotion type as needed
move = new PromotionMove(board.Status, from, to);
move.ChangeSideToMove(); // change the side to move
move.SetEnPassantTarget(null); // reset the en passant target
move.ResetPly(); // reset the ply
move.IncrementMoves(); // increment the number of moves
(move as PromotionMove).SetCapture(board[to]); // the capture information is set
}
return(move);
}
else
{
return(null);
}
}
/// <summary>
/// Generates the move.
/// </summary>
/// <param name="board">The board</param>
/// <param name="from">The starting square</param>
/// <param name="to">The ending square</param>
/// <returns></returns>
internal override Move GenerateMove(Board board, int from, int to)
{
Move move;
// if it's an en passant capture
if (IsEnPassantCaptureMove(board, from, to))
{
move = new EnPassantCaptureMove(board.Status, from, to);
move.ChangeSideToMove();// change the side to move
move.SetEnPassantTarget(null);// reset the en passant target
move.ResetPly();// reset the ply
move.IncrementMoves();// increment the number of moves
// we need to verify for check
move.Make(board);
bool result = !board.BlackKingInCheck();
move.TakeBack(board);
return result ? move : null;
}
move = base.GenerateMove(board, from, to);
if (move != null)
{
move.ResetPly();// reset the ply
// if it's the two-squares move
if (IsTwoSquaresMove(board, from, to))
{
// set the en passant target
move.SetEnPassantTarget(to - Board.SideSquareNo);
}
// if it's a promotion
if (Board.Rank(to) == Board.SideSquareNo - 1)
{
// we don't need to verify for check again
// so the promotion delegate will not be triggered
// later we will change the promotion type as needed
move = new PromotionMove(board.Status, from, to);
move.ChangeSideToMove();// change the side to move
move.SetEnPassantTarget(null);// reset the en passant target
move.ResetPly();// reset the ply
move.IncrementMoves();// increment the number of moves
(move as PromotionMove).SetCapture(board[to]);// the capture information is set
}
return move;
}
else
{
return null;
}
}
