public ReverseMoveWithEran(ReverseMove move, string eran)
{
ReverseMove = move;
Eran = eran;
}
public static ReverseMove ParseEran(ChessGame game, string eran)
{
ReverseMove rmove = new ReverseMove();
var parts = eran.Split(' ');
var ran = parts[0];
var oldCastlingRights = parts[1];
var oldEpSquare = parts[2];
Player prevPlayer =
game.WhoseTurn == Player.Black
? Player.White
: Player.Black;
if (ran == "O-O" || ran == "O-O-O")
{
if (ran == "O-O")
{
int r = prevPlayer == Player.White ? 1 : 8;
var origin = new Position(File.E, r);
var destination = new Position(File.G, r);
rmove.Move = new Move(origin, destination, prevPlayer, null);
}
else
{
int r = prevPlayer == Player.White ? 1 : 8;
var origin = new Position(File.E, r);
var destination = new Position(File.C, r);
rmove.Move = new Move(origin, destination, prevPlayer, null);
}
}
else
{
rmove.Move = new Move((Position)null, null, prevPlayer);
Piece movedPiece = TryMakePieceFromChar(ran[0], prevPlayer);
if (movedPiece != null)
{
ran = ran.Substring(1);
}
{
int fromSquareFile = ran[0] - 'a';
int fromSquareRank = ran[1] - '1';
rmove.Move.OriginalPosition = new Position((File)fromSquareFile, fromSquareRank + 1);
ran = ran.Substring(2);
}
if (ran[0] == '-')
{
ran = ran.Substring(1);
}
else if (ran[0] == 'x')
{
rmove.CapturedPiece = TryMakePieceFromChar(ran[1], game.WhoseTurn);
if (rmove.CapturedPiece == null)
{
rmove.CapturedPiece = new Pawn(game.WhoseTurn);
ran = ran.Substring(1);
}
else
{
ran = ran.Substring(2);
}
}
else
{
throw new ArgumentException("Invalid ERAN");
}
{
int toSquareFile = ran[0] - 'a';
int toSquareRank = ran[1] - '1';
rmove.Move.NewPosition = new Position((File)toSquareFile, toSquareRank + 1);
ran = ran.Substring(2);
}
if (ran.Length > 0 && ran[0] == '=')
{
rmove.Move.Promotion = ran[1];
}
}
// castling rights
if (oldCastlingRights.Contains('K'))
{
rmove.CouldWhiteCastleKingSide = true;
}
if (oldCastlingRights.Contains('Q'))
{
rmove.CouldWhiteCastleQueenSide = true;
}
if (oldCastlingRights.Contains('k'))
{
rmove.CouldBlackCastleKingSide = true;
}
if (oldCastlingRights.Contains('q'))
{
rmove.CouldBlackCastleQueenSide = true;
}
// epsquare
if (oldEpSquare.Length > 1)
{
int epSquareFile = oldEpSquare[0] - 'a';
int epSquareRank = oldEpSquare[1] - '1';
rmove.OldEpSquare = new Position((File)epSquareFile, epSquareRank + 1);
}
return(rmove);
}
