private int GetMovingPiece(Board board, PGNMove move, int fromX, int fromY)
{
// figure out which piece is moving
int from = -1;
var pieces = board.FindByPieceAndColor(move.Piece, board.PlayerTurn);
var possible = new List <int>();
foreach (var p in pieces)
{
var moves = Moves.GetValidMoves(board, p);
if (moves.Contains(move.To))
{
possible.Add(p);
}
}
if (possible.Count == 0)
{
throw new Exception("No piece has a valid move to tile " + Notation.TileToText(move.To));
}
if (possible.Count > 1)
{
// filter possible pieces by using the hints
if (fromX != -1)
{
possible = possible.Where(k => Board.X(k) == fromX).ToList();
}
if (fromY != -1)
{
possible = possible.Where(k => Board.Y(k) == fromY).ToList();
}
}
if (possible.Count != 1)
{
throw new Exception("No piece has a valid move to tile " + Notation.TileToText(move.To));
}
from = possible[0];
return(from);
}
public static PGNGame DecodeGame(string encodedString)
{
var s = encodedString;
int i = 0;
Color player = Color.White;
int move = 1;
var moves = new List <PGNMove>();
PGNMove lastmove = null;
while (i < s.Length - 1)
{
// check if the last move wa actually a promotion
if (Decode[s[i]] == SpecialInstruction)
{
lastmove.Promotion = (Piece)Decode[s[i + 1]];
continue;
}
var from = Decode[s[i]];
var to = Decode[s[i + 1]];
lastmove = new PGNMove()
{
From = from, To = to, MoveNumber = move, Color = player /*, Piece = ...*/
};
if (player == Color.Black)
{
move++;
}
player = (player == Color.White) ? Color.Black : Color.White;
moves.Add(lastmove);
i += 2;
}
var variation = new GameVariation(moves.Select(x => (IPGNElement)x).ToList());
var game = new PGNGame(new Dictionary <string, string>(), variation);
return(game);
}
/// <summary>
/// Returns information about the move.
/// Is not guaranteed to return the "From" or "Color" field.
/// Includes:
/// Piece
/// To
/// Promotion
/// Check
/// Mate
/// </summary>
/// <returns></returns>
public PGNMove GetMove(Board board)
{
var val = Value.Trim();
var move = new PGNMove();
move.Check = val.Contains('+') || val.Contains('#');
move.Mate = val.Contains('#');
move.Capture = val.Contains('x');
move.Color = board.PlayerTurn;
move.MoveNumber = board.MoveCount;
val = Regex.Replace(val, @"[x\.\+\#]", "");
move.Piece = Notation.GetPiece(val);
move.Promotion = Notation.GetPromotion(val);
// remove piece type and promotion
if (move.Piece != Piece.Pawn)
{
val = val.Substring(1);
}
if (move.Promotion != Piece.None)
{
val = val.Replace("=", "");
val = val.Substring(0, val.Length - 1);
}
if (val == "O-O")
{
move.From = (move.Color == Color.White) ? 4 : 60;
move.To = (move.Color == Color.White) ? 6 : 62;
move.Piece = Piece.King;
}
else if (val == "O-O-O")
{
move.From = (move.Color == Color.White) ? 4 : 60;
move.To = (move.Color == Color.White) ? 2 : 58;
move.Piece = Piece.King;
}
else
{
move.To = Notation.TextToTile(val.Substring(val.Length - 2));
int fromX = -1;
int fromY = -1;
// check if there is additional information in the move, e.g. "From" tile
if (val.Length == 4)
{
move.From = Notation.TextToTile(val.Substring(0, 2));
}
else if (val.Length == 3)
{
char ch = val[0];
if (Char.IsLetter(ch))
{
fromX = Notation.FileToInt(ch);
}
else
{
fromY = Notation.RankToInt(ch);
}
}
move.From = GetMovingPiece(board, move, fromX, fromY);
}
return(move);
}
/// <summary>
/// Returns information about the move.
/// Is not guaranteed to return the "From" or "Color" field.
/// Includes:
/// Piece
/// To
/// Promotion
/// Check
/// Mate
/// </summary>
/// <returns></returns>
public PGNMove GetMove(Board board)
{
var val = Value.Trim();
var move = new PGNMove();
move.Check = val.Contains('+') || val.Contains('#');
move.Mate = val.Contains('#');
move.Capture = val.Contains('x');
move.Color = board.PlayerTurn;
move.MoveNumber = board.MoveCount;
val = Regex.Replace(val, @"[x\.\+\#]", "");
move.Piece = Notation.GetPiece(val);
move.Promotion = Notation.GetPromotion(val);
// remove piece type and promotion
if(move.Piece != Piece.Pawn)
val = val.Substring(1);
if(move.Promotion != Piece.None)
{
val = val.Replace("=", "");
val = val.Substring(0, val.Length - 1);
}
if(val == "O-O")
{
move.From = (move.Color == Color.White) ? 4 : 60;
move.To = (move.Color == Color.White) ? 6 : 62;
move.Piece = Piece.King;
}
else if (val == "O-O-O")
{
move.From = (move.Color == Color.White) ? 4 : 60;
move.To = (move.Color == Color.White) ? 2 : 58;
move.Piece = Piece.King;
}
else
{
move.To = Notation.TextToTile(val.Substring(val.Length - 2));
int fromX = -1;
int fromY = -1;
// check if there is additional information in the move, e.g. "From" tile
if (val.Length == 4)
{
move.From = Notation.TextToTile(val.Substring(0, 2));
}
else if (val.Length == 3)
{
char ch = val[0];
if (Char.IsLetter(ch))
fromX = Notation.FileToInt(ch);
else
fromY = Notation.RankToInt(ch);
}
move.From = GetMovingPiece(board, move, fromX, fromY);
}
return move;
}
private int GetMovingPiece(Board board, PGNMove move, int fromX, int fromY)
{
// figure out which piece is moving
int from = -1;
var pieces = board.FindByPieceAndColor(move.Piece, board.PlayerTurn);
var possible = new List<int>();
foreach (var p in pieces)
{
var moves = Moves.GetValidMoves(board, p);
if (moves.Contains(move.To))
possible.Add(p);
}
if (possible.Count == 0)
throw new Exception("No piece has a valid move to tile " + Notation.TileToText(move.To));
if (possible.Count > 1)
{
// filter possible pieces by using the hints
if (fromX != -1)
possible = possible.Where(k => Board.X(k) == fromX).ToList();
if (fromY != -1)
possible = possible.Where(k => Board.Y(k) == fromY).ToList();
}
if (possible.Count != 1)
throw new Exception("No piece has a valid move to tile " + Notation.TileToText(move.To));
from = possible[0];
return from;
}
public static string EncodeMove(PGNMove move)
{
return EncodeMove(move.From, move.To, move.Promotion);
}
public static PGNGame DecodeGame(string encodedString)
{
var s = encodedString;
int i = 0;
Color player = Color.White;
int move = 1;
var moves = new List<PGNMove>();
PGNMove lastmove = null;
while(i < s.Length - 1)
{
// check if the last move wa actually a promotion
if (Decode[s[i]] == SpecialInstruction)
{
lastmove.Promotion = (Piece)Decode[s[i + 1]];
continue;
}
var from = Decode[s[i]];
var to = Decode[s[i + 1]];
lastmove = new PGNMove() { From = from, To = to, MoveNumber = move, Color = player/*, Piece = ...*/ };
if(player == Color.Black)
move++;
player = (player == Color.White) ? Color.Black : Color.White;
moves.Add(lastmove);
i += 2;
}
var variation = new GameVariation(moves.Select(x => (IPGNElement)x).ToList());
var game = new PGNGame(new Dictionary<string, string>(), variation);
return game;
}
public static string EncodeMove(PGNMove move)
{
return(EncodeMove(move.From, move.To, move.Promotion));
}