private void SetupPosition(string[] args)
{
var positionType = args[1];
ChessPosition position;
switch (positionType)
{
case "startpos": position = ChessPosition.FromFEN("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1 "); break;
case "fen": position = ChessPosition.FromFEN(args[2], args[3], args[4]); break;
default: return;
}
game.Add(new GameState(position, new ChessMove(0)));
int movesIndex;
for (movesIndex = 2; movesIndex < args.Length; movesIndex++)
{
if (args[movesIndex] == "moves")
{
break;
}
}
for (int i = movesIndex + 1; i < args.Length; i++)
{
ChessMove move = ChessMove.Parse(args[i]);
position = position.ApplyMove(move);
game.Add(new GameState(position, move));
}
}
internal GameState(ChessPosition p, ChessMove m)
{
Position = p;
Move = m;
}
internal static float[] Evaluate(ChessPosition position) => Evaluate(new ChessPosition[] { position })[0];
internal static ChessPosition FromFEN(string boardfen, string turn, string castling)
{
var position = new ChessPosition
{
whiteToMove = (turn == "w"),
board = Board.FromFen(boardfen),
enPassantSquare = new Square(64),
};
foreach (char c in castling)
{
switch (c)
{
case 'K':
case 'Q':
for (Square ws = new Square(0); ws.binary < 8; ws.binary++)
{
if (position.GetPiece(ws) == 'R')
{
if (position.whiteOOO == null)
{
position.whiteOOO = ws.File;
}
else
{
position.whiteOO = ws.File;
}
}
}
break;
case 'k':
case 'q':
for (Square bs = new Square(64 - 8); bs.binary < 64; bs.binary++)
{
if (position.GetPiece(bs) == 'r')
{
if (position.blackOOO == null)
{
position.blackOOO = bs.File;
}
else
{
position.blackOO = bs.File;
}
}
}
break;
default:
if (c >= 'A' && c <= 'H')
{
if (position.whiteOOO == null)
{
position.whiteOOO = c - 'A';
}
else
{
position.whiteOO = c - 'A';
}
}
else if (c >= 'a' && c <= 'h')
{
if (position.blackOOO == null)
{
position.blackOOO = c - 'a';
}
else
{
position.blackOO = c - 'a';
}
}
break;
}
}
return(position);
}
