public Othello ApplyMove(ulong location)
{
var nextState = new Othello
{
player1Pieces = player1Pieces,
player2Pieces = player2Pieces,
skips = skips,
lastMove = location,
LastPlayersTurn = CurrentPlayersTurn,
CurrentPlayersTurn = CurrentPlayersTurn == PlayerId.Player1 ? PlayerId.Player2 : PlayerId.Player1,
};
if (location == skipMoveLocation)
{
nextState.skips += 1;
return(nextState);
}
nextState.skips = 0;
if (CurrentPlayersTurn == PlayerId.Player1)
{
ulong captures = Captures(player1Pieces, player2Pieces, location);
nextState.player1Pieces |= captures | location;
nextState.player2Pieces &= ~captures;
}
else
{
ulong captures = Captures(player2Pieces, player1Pieces, location);
nextState.player2Pieces |= captures | location;
nextState.player1Pieces &= ~captures;
}
return(nextState);
}
public void TestEndCaptures()
{
// 0 1 2 3 4 5 6 7
// 8 9 10 11 12 13 14 15
// 16 17 18 19 20 21 22 23
// 24 25 26 X O 29 30 31
// 32 33 34 O X 37 38 39
// 40 41 42 43 44 45 46 47
// 48 49 50 51 52 53 54 55
// 56 57 58 59 60 61 62 63
var state = new Othello();
state.player1Pieces = ulong.MaxValue & ~(1ul << 57);
state.player2Pieces = 1ul << 57;
var successors = state.ExpandSuccessors();
if (successors.Length != 1)
{
throw new Exception("should only be 1 successor");
}
var next = (Othello)successors[0];
if (next.player1Pieces != state.player1Pieces || next.player2Pieces != state.player2Pieces)
{
throw new Exception("pieces are not the same");
}
if (next.skips != (state.skips + 1))
{
throw new Exception("skips should be 1");
}
if (next.IsTerminal(out PlayerId _))
{
throw new Exception("should have to skip more before terminal");
}
state = next;
successors = state.ExpandSuccessors();
if (successors.Length != 1)
{
throw new Exception("should only be 1 successor");
}
next = (Othello)successors[0];
if (next.player1Pieces != state.player1Pieces || next.player2Pieces != state.player2Pieces)
{
throw new Exception("pieces are not the same 2");
}
if (next.skips != (state.skips + 1))
{
throw new Exception("skips should be 2");
}
if (!next.IsTerminal(out PlayerId _))
{
throw new Exception("should be terminal");
}
}
public static void GetBoardRepresentation(Othello state, System.IO.TextWriter writer)
{
Dictionary <PlayerId, string> rep = new Dictionary <PlayerId, string>()
{
{ PlayerId.None, " " },
{ PlayerId.Player1, " X" },
{ PlayerId.Player2, " O" },
};
Console.ForegroundColor = ConsoleColor.White;
var board = state.GetBoard();
for (int i = 0; i < 8; i++)
{
var player = board[i * 8];
for (int j = 0; j < 8; j++)
{
player = board[i * 8 + j];
if (j > 0)
{
Console.ForegroundColor = ConsoleColor.White;
writer.Write("|");
}
if (player == PlayerId.None)
{
if (state.IsValidMove(1ul << (i * 8 + j)))
{
Console.ForegroundColor = ConsoleColor.DarkGray;
writer.Write((i * 8 + j).ToString().PadLeft(2));
}
else
{
writer.Write(" ");
}
}
else
{
var cellPlayer = board[i * 8 + j];
Console.ForegroundColor = cellPlayer == PlayerId.Player1 ? ConsoleColor.Red : ConsoleColor.Blue;
writer.Write(rep[cellPlayer]);
}
}
writer.WriteLine();
if (i < 7)
{
Console.ForegroundColor = ConsoleColor.White;
writer.WriteLine("--+--+--+--+--+--+--+--");
}
}
Console.ResetColor();
}
public void TestCaptures()
{
// 0 1 2 3 4 5 6 7
// 8 9 10 11 12 13 14 15
// 16 17 18 19 20 21 22 23
// 24 25 26 X O 29 30 31
// 32 33 34 O X 37 38 39
// 40 41 42 43 44 45 46 47
// 48 49 50 51 52 53 54 55
// 56 57 58 59 60 61 62 63
const ulong noCaptures = 0ul;
var state = new Othello();
var captures = state.Captures(state.player1Pieces, state.player2Pieces, 1ul << 19);
if (captures != noCaptures)
{
throw new Exception("expected no captures, got " + string.Join(", ", GetLocations(captures)));
}
}