private void MakeMove(IGame game, ilf.pgn.Data.Move move)
{
switch (move.Type)
{
case ilf.pgn.Data.MoveType.Simple:
case ilf.pgn.Data.MoveType.Capture:
case ilf.pgn.Data.MoveType.CaptureEnPassant:
MakeMoveSimpleOrCapture(game, move);
break;
case ilf.pgn.Data.MoveType.CastleKingSide:
case ilf.pgn.Data.MoveType.CastleQueenSide:
BoardLocation targetLocation;
if (game.CurrentPlayer == Player.White)
{
targetLocation = move.Type == ilf.pgn.Data.MoveType.CastleKingSide ? BoardLocation.G1 : BoardLocation.C1;
}
else
{
targetLocation = move.Type == ilf.pgn.Data.MoveType.CastleKingSide ? BoardLocation.G8 : BoardLocation.C8;
}
game.MakeMove(
game.CurrentPlayer == Player.White ? BoardLocation.E1 : BoardLocation.E8,
targetLocation);
break;
}
}
private void MakeMoveSimpleOrCapture(IGame game, ilf.pgn.Data.Move move)
{
var availableMoves = game.FindMoves();
var targetBoardLocation = move.TargetSquare.ToBoardLocation();
var chessPieceMoving = move.Piece.Value.ToChessPiece(game.CurrentPlayer);
var qualifyingMoves = availableMoves
.Where(a => a.Destination == targetBoardLocation && game.Board[a.Source] == chessPieceMoving)
.ToList();
if (qualifyingMoves.Count == 0)
{
throw new Exception("Unexpected");
}
else if (qualifyingMoves.Count == 1)
{
game.MakeMove(qualifyingMoves.Single());
}
else
{
//if we have a pawn promotion, remove all this junk...
if (move.PromotedPiece.HasValue)
{
qualifyingMoves.RemoveAll(a => a.SpecialMoveType != ToSpecialMoveType(move.PromotedPiece.Value));
}
if (move.OriginFile.HasValue)
{
var requiredColumn = move.OriginFile.Value.ToColumn();
qualifyingMoves.RemoveAll(a => a.Source.Column() != requiredColumn);
}
else if (move.OriginRank.HasValue)
{
var requiredRow = move.OriginRank.Value - 1;//remove 1 to adjust for zero based goodness
qualifyingMoves.RemoveAll(a => a.Source.Row() != requiredRow);
}
if (qualifyingMoves.Count != 1)
{
//we need to do more digging, more than one piece can make this move...
throw new NotImplementedException("Failed to load game game from PGN file. Unexpected state found.");
}
game.MakeMove(qualifyingMoves.Single());
}
}