internal ChessMove(DateTime startedAt, ChessPiece piece, Coordinate to, ChessMoveAction action)
{
StartedAt = startedAt;
Player = piece.Owner;
Piece = piece.Piece;
File = piece.File;
Rank = piece.Rank;
To = to;
Action = action;
Timestamp = DateTime.UtcNow;
}
public void MovePiece(ChessPiece piece, Coordinate tile)
{
ChessPiece focus = GetPiece(piece.Rank, piece.File);
if (focus == null)
{
return;
}
if (LastMove != null)
{
Console.WriteLine($"{LastMove.Piece} ({LastMove.Rank}, {LastMove.File} => {LastMove.To.X}, {LastMove.To.Y})");
}
if (LastMove != null &&
LastMove.Piece == ChessRank.Pawn &&
LastMove.Player != focus.Owner &&
LastMove.File == ((LastMove.Player == ChessOwner.Black) ? 1 : 6) &&
LastMove.To.Y == ((LastMove.Player == ChessOwner.Black) ? 3 : 4) &&
focus.Piece == ChessRank.Pawn &&
tile.X == LastMove.To.X &&
(LastMove.Player == ChessOwner.Black
? LastMove.To.Y - ((LastMove.Player == ChessOwner.Black) ? 2 : 5)
: ((LastMove.Player == ChessOwner.Black) ? 2 : 5) - LastMove.To.Y) == 1)
{
ChessPiece target = GetPiece(LastMove.To.X, LastMove.To.Y);
if (target == null)
{
throw new Exception("Expected pawn at specified tile");
}
Pieces.Remove(target);
ChessOwner enemy = focus.Owner == ChessOwner.Black ? ChessOwner.White : ChessOwner.Black;
ChessMoveAction action = 0;
if (IsCheckmate(enemy))
{
action |= ChessMoveAction.Checkmate;
}
else if (IsInCheck(enemy))
{
action |= ChessMoveAction.Check;
}
LastMove = new ChessMove(StartedAt, focus, tile, action | ChessMoveAction.EnPassant);
focus.Rank = tile.X;
focus.File = tile.Y;
}
else
{
ChessPiece target = GetPiece(tile.X, tile.Y);
ChessOwner enemy = focus.Owner == ChessOwner.Black ? ChessOwner.White : ChessOwner.Black;
ChessMoveAction action = 0;
if (IsCheckmate(enemy))
{
action |= ChessMoveAction.Checkmate;
}
else if (IsInCheck(enemy))
{
action |= ChessMoveAction.Check;
}
if (target != null)
{
Pieces.Remove(target);
action |= ChessMoveAction.Capture;
}
LastMove = new ChessMove(StartedAt, focus, tile, action);
focus.Rank = tile.X;
focus.File = tile.Y;
}
}
