public UltimateTicTacToeBoard()
{
for (int i = 0; i < 9; i++)
{
_grid[i] = new TicTacToeBoard();
}
State = GameState.Open;
WinningMove = null;
}
private static short CountWins(Player player, TicTacToeBoard board)
{
var wins = (short)(CanWin(player, board, new[] { 0, 1, 2 }) ? 1 : 0);
wins += (short)(CanWin(player, board, new[] { 3, 4, 5 }) ? 1 : 0);
wins += (short)(CanWin(player, board, new[] { 6, 7, 8 }) ? 1 : 0);
wins += (short)(CanWin(player, board, new[] { 0, 3, 6 }) ? 1 : 0);
wins += (short)(CanWin(player, board, new[] { 1, 4, 7 }) ? 1 : 0);
wins += (short)(CanWin(player, board, new[] { 2, 5, 8 }) ? 1 : 0);
wins += (short)(CanWin(player, board, new[] { 0, 4, 8 }) ? 1 : 0);
wins += (short)(CanWin(player, board, new[] { 2, 4, 6 }) ? 1 : 0);
return(wins);
}
private static short CalculateScore(TicTacToeBoard board)
{
short xWins = 0;
short oWins = 0;
if (board.State == GameState.Xwin)
{
xWins = 100;
}
else if (board.State == GameState.Owin)
{
oWins = 100;
}
else if (board.State == GameState.Open)
{
xWins = CountWins(Player.X, board);
oWins = CountWins(Player.O, board);
}
return((short)(xWins - oWins));
}
internal TicTacToeBoard Clone(bool cloneMoves = false)
{
var clonedBoard = new TicTacToeBoard();
if (cloneMoves)
{
foreach (var move in _moves)
{
clonedBoard._moves.AddLast(move);
}
}
else if (_moves.Count >= 1)
{
clonedBoard._moves.AddLast(_moves.Last.Value);
}
clonedBoard.WinningMove = WinningMove;
clonedBoard.State = State;
_grid.CopyTo(clonedBoard._grid, 0);
return(clonedBoard);
}
private static bool CanWin(Player player, TicTacToeBoard board, IEnumerable <int> cells)
{
return(cells.All(cell => board.CellValue((byte)cell) == Player.Empty || board.CellValue((byte)cell) == player));
}
