/// <summary>
/// Returns a text drawing of the position with the given comments displayed.
/// </summary>
/// <param name="comments">The comments to display.</param>
/// <returns>A text drawing of the position with the given comments displayed</returns>
public String ToString(params String[] comments)
{
StringBuilder sb = new StringBuilder(" +------------------------+ ", 400);
Int32 index = 0;
if (index < comments.Length)
{
sb.Append(comments[index++]);
}
for (Int32 rank = 0; rank < 8; rank++)
{
sb.Append(Environment.NewLine);
sb.Append(' ');
sb.Append(8 - rank);
sb.Append(" |");
for (Int32 file = 0; file < 8; file++)
{
Int32 piece = Square[file + rank * 8];
if (piece != Piece.Empty)
{
sb.Append((piece & Colour.Mask) == Colour.White ? '<' : '[');
sb.Append(Stringify.PieceInitial(piece));
sb.Append((piece & Colour.Mask) == Colour.White ? '>' : ']');
}
else
{
sb.Append((file + rank) % 2 == 1 ? ":::" : " ");
}
}
sb.Append("| ");
if (index < comments.Length)
{
sb.Append(comments[index++]);
}
}
sb.Append(Environment.NewLine);
sb.Append(" +------------------------+ ");
if (index < comments.Length)
{
sb.Append(comments[index++]);
}
sb.Append(Environment.NewLine);
sb.Append(" a b c d e f g h ");
if (index < comments.Length)
{
sb.Append(comments[index++]);
}
return(sb.ToString());
}
/// <summary>
/// Returns the FEN string that describes the position.
/// </summary>
/// <returns>The FEN string that describes the position.</returns>
public String GetFEN()
{
StringBuilder sb = new StringBuilder();
for (Int32 rank = 0; rank < 8; rank++)
{
Int32 spaces = 0;
for (Int32 file = 0; file < 8; file++)
{
Int32 square = file + rank * 8;
if (Square[square] == Piece.Empty)
{
spaces++;
}
else
{
if (spaces > 0)
{
sb.Append(spaces);
spaces = 0;
}
String piece = Stringify.PieceInitial(Square[square]);
if ((Square[square] & Colour.Mask) == Colour.Black)
{
piece = piece.ToLowerInvariant();
}
sb.Append(piece);
}
}
if (spaces > 0)
{
sb.Append(spaces);
}
if (rank < 7)
{
sb.Append('/');
}
}
sb.Append(' ');
sb.Append(SideToMove == Colour.White ? 'w' : 'b');
sb.Append(' ');
if (CastleKingside[Colour.White] > 0)
{
sb.Append('K');
}
if (CastleQueenside[Colour.White] > 0)
{
sb.Append('Q');
}
if (CastleKingside[Colour.Black] > 0)
{
sb.Append('k');
}
if (CastleQueenside[Colour.Black] > 0)
{
sb.Append('q');
}
if (sb[sb.Length - 1] == ' ')
{
sb.Append('-');
}
sb.Append(' ');
if (EnPassantSquare != InvalidSquare)
{
sb.Append(Stringify.Square(EnPassantSquare));
}
else
{
sb.Append('-');
}
sb.Append(' ');
sb.Append(FiftyMovesClock);
sb.Append(' ');
sb.Append(HalfMoves / 2 + 1);
return(sb.ToString());
}