public GameCore Copy()
{
var copyGame = new GameCore(_player1, _player2);
copyGame._currentPlayer = this._currentPlayer;
copyGame._board = Board.Copy();
return copyGame;
}
public void TestFindAndBlockOpponentCompulsion()
{
//setup the initial condition
var player1 = "Player 1";
var player2 = "Player 2";
var game = new GameCore(player1, player2, player2);
var board = game.Board;
// x x x
// t t t
// t t t
// t t t x
// t t t x t . .
/////////////////
board[0][0].OwningPlayer = player2;
board[0][1].OwningPlayer = player2;
board[0][2].OwningPlayer = player2;
board[0][3].OwningPlayer = player1;
board[0][4].OwningPlayer = player1;
board[0][5].OwningPlayer = player2;
board[1][0].OwningPlayer = player1;
board[1][1].OwningPlayer = player1;
board[1][2].OwningPlayer = player1;
board[1][3].OwningPlayer = player2;
board[1][4].OwningPlayer = player1;
board[2][0].OwningPlayer = player2;
board[2][1].OwningPlayer = player1;
board[2][2].OwningPlayer = player2;
board[2][3].OwningPlayer = player1;
board[2][4].OwningPlayer = player1;
board[3][0].OwningPlayer = player1;
board[3][1].OwningPlayer = player1;
board[4][0].OwningPlayer = player2;
board[4][1].OwningPlayer = player2;
var mocks = new MockRepository();
var gc = mocks.StrictMock<IGameController>();
Expect.Call(gc.Game).Return(game).Repeat.Any();
mocks.ReplayAll();
var ai = new AIBase(AIDifficulty.VeryHard);
ai.PlayTurn(gc, player2);
Assert.AreEqual(player2, board[3][2].OwningPlayer);
mocks.VerifyAll();
}
public void TestFindTwoTurnCompultionWinForTile_DoesntThrowGame()
{
//setup the initial condition
var player1 = "Player 1";
var player2 = "Player 2";
var game = new GameCore(player1, player2);
var board = game.Board;
//If player one, x tries to play on 4,0 to start a compulsion
//it would backfire, giving player two the win via a positive diagonal
//connection. So make sure that option isn't considered
// . . . . . x t
// . . . . . t x
// . . x x . x t
// . . x t . t x
////////////////////
board[2][0].OwningPlayer = player1;
board[2][1].OwningPlayer = player1;
board[3][0].OwningPlayer = player2;
board[3][1].OwningPlayer = player1;
//column four is empty
board[5][0].OwningPlayer = player2;
board[5][1].OwningPlayer = player1;
board[5][2].OwningPlayer = player2;
board[5][3].OwningPlayer = player1;
board[6][0].OwningPlayer = player1;
board[6][1].OwningPlayer = player2;
board[6][2].OwningPlayer = player1;
board[6][3].OwningPlayer = player2;
List<Tile> compulsionWin = AIHelper.FindTwoTurnCompulsionWin(game, player1);
Assert.AreEqual(0, compulsionWin.Count);
}
public void TestFindTwoTurnCompultionWinForTile4()
{
//setup the initial condition
var player1 = "Player 1";
var player2 = "Player 2";
var game = new GameCore(player1, player2);
var board = game.Board;
// x x x
// t t t
// t t t
// t t t x
// t t t x . . .
/////////////////
board[0][0].OwningPlayer = player2;
board[0][1].OwningPlayer = player2;
board[0][2].OwningPlayer = player2;
board[0][3].OwningPlayer = player1;
board[0][4].OwningPlayer = player1;
board[1][0].OwningPlayer = player1;
board[1][1].OwningPlayer = player1;
board[1][2].OwningPlayer = player1;
board[1][3].OwningPlayer = player2;
board[1][4].OwningPlayer = player1;
board[2][0].OwningPlayer = player2;
board[2][1].OwningPlayer = player1;
board[2][2].OwningPlayer = player2;
board[2][3].OwningPlayer = player1;
board[2][4].OwningPlayer = player1;
board[3][0].OwningPlayer = player1;
board[3][1].OwningPlayer = player1;
List<Tile> compulsionWin = AIHelper.FindTwoTurnCompulsionWin(game, player1);
Assert.AreEqual(1, compulsionWin.Count);
Assert.AreEqual(board[3][2], compulsionWin[0]);
}
public void TestFindTwoTurnCompultionWinForTile1()
{
//setup the initial condition
var player1 = "Player 1";
var player2 = "Player 2";
var game = new GameCore(player1, player2);
var board = game.Board;
// . . . . . x
// . . . . . t
// . . x x . x
// . . x t . t .
////////////////////
board[2][0].OwningPlayer = player1;
board[2][1].OwningPlayer = player1;
board[3][0].OwningPlayer = player2;
board[3][1].OwningPlayer = player1;
//column 4 is empty, with which we can create a compulsion.
//If player one places a tile in column four, it will cause a potential
//win if they place another one (4 horizontally) so player 2 will have to
//block it. But that will let player 1 place a tile there to win
//via a diagonal.
board[5][0].OwningPlayer = player2;
board[5][1].OwningPlayer = player1;
board[5][2].OwningPlayer = player2;
board[5][3].OwningPlayer = player1;
List<Tile> compulsionWin = AIHelper.FindTwoTurnCompulsionWin(game, player1);
Assert.AreEqual(1, compulsionWin.Count);
Assert.AreEqual(board[4][0], compulsionWin[0]);
}
public void TestFindFourTokenConnectionPossibilties()
{
//setup the initial condition
var player1 = "Player 1";
var player2 = "Player 2";
var game = new GameCore(player1, player2);
var board = game.Board;
board[0][0].OwningPlayer = player1;
board[1][0].OwningPlayer = player2;
board[4][0].OwningPlayer = player1;
board[4][1].OwningPlayer = player1;
board[5][0].OwningPlayer = player1;
board[5][1].OwningPlayer = player2;
List<TileConnection> conns = AIHelper.FindFourTokenConnectionPossibilties(board, player1);
//Around 0,0
Assert.AreEqual("[0,0] - [0,3]", conns[0].ToString()); //vert
Assert.AreEqual("[0,0] - [3,3]", conns[1].ToString()); //+diag
//Around 4,0
//Assert.AreEqual("[4,0] - [4,3]", conns[2].ToString()); //vert subset of [4,0] - [4,4]
//Assert.AreEqual("[2,0] - [6,0]", conns[2].ToString()); //horiz dup of [2,0] - [6,0] around 5,0
Assert.AreEqual("[1,3] - [4,0]", conns[2].ToString()); //-diag
//Around 4,1
Assert.AreEqual("[4,0] - [4,4]", conns[3].ToString()); //vert
Assert.AreEqual("[1,1] - [4,1]", conns[4].ToString()); //horiz
Assert.AreEqual("[3,0] - [6,3]", conns[5].ToString()); //+diag
Assert.AreEqual("[1,4] - [5,0]", conns[6].ToString()); //-diag
//Around 5,0
Assert.AreEqual("[2,0] - [6,0]", conns[7].ToString());
//Assert.AreEqual("[2,3] - [5,0]", conns[10].ToString()); //-diag subset of [1,4] - [5,0]
Assert.AreEqual(8, conns.Count);
}
public void TestFindAndSetupWinningCompulsion()
{
//setup the initial condition
var player1 = "Player 1";
var player2 = "Player 2";
var game = new GameCore(player1, player2);
var board = game.Board;
board[2][0].OwningPlayer = player1;
board[2][1].OwningPlayer = player1;
board[3][0].OwningPlayer = player2;
board[3][1].OwningPlayer = player1;
//column 4 is empty, with which we can create a compulsion.
//If player one places a tile in column four, it will cause a potential
//win if they place another one (4 horizontally) so player 2 will have to
//block it. But that will let player 1 place a tile there to win
//via a diagonal.
board[5][0].OwningPlayer = player2;
board[5][1].OwningPlayer = player1;
board[5][2].OwningPlayer = player2;
board[5][3].OwningPlayer = player1;
var mocks = new MockRepository();
var gc = mocks.StrictMock<IGameController>();
Expect.Call(gc.Game).Return(game).Repeat.Any();
mocks.ReplayAll();
var ai = new AIBase();
ai.PlayTurn(gc, player1);
Assert.AreEqual(player1, board[4][0].OwningPlayer);
mocks.VerifyAll();
}
//Test Me
public int GetRatingForTile(GameCore gameCore, Tile tile, Object player)
{
int rating = 0;
//First check if placing a tile here will force the opponent to block us, or give the
//opponent a wining move. We shouldn't consider those tiles.
var copy = gameCore.Copy();
copy.DropTokenOnColumn(tile.ColumnNo);
var otherPlayerDirectWinnable = AIHelper.FindDirectWinningPossibilities(copy.Board, gameCore.GetOtherPlayer(player));
if (otherPlayerDirectWinnable.Count > 0) {
//lower skilled players can miss an opponents winning move, especially if they are
//focused on their own win
if (_difficulty == AIDifficulty.VeryEasy) { rating -= 2; }
else if (_difficulty == AIDifficulty.Easy) { rating -= 4; }
else if (_difficulty == AIDifficulty.Medium) { rating -= 6; }
else {
//the other player can win if we play here, so don't play
return -1000;
}
}
var usDirectWinnable = AIHelper.FindDirectWinningPossibilities(copy.Board, player);
if (usDirectWinnable.Count > 0) {
//we can win next turn if we place here, forcing the other player to make a blocking move.
//It may be worth making the move anyway if it gives us a good position, and there isn't
//anything better, so don't completley discount it.
if (CanCreateCompulsion(copy.Board)) {
rating -= 3;
} else {
//if the player can't create compulsions we shouldn't penalize them for
//trying to win
if (_difficulty < AIDifficulty.Medium) {
//lower skilled players will chase a win
rating += 2;
}
}
}
//We are trying to create general opportunities to head into the end game by creating
//potential token connections. So we want to look at where we have potential connections
//and try to build that area up to generate a compulsion.
rating += (FindTilesInConnection(gameCore, tile, player).Count * 2);
//Future ToDos
//Now check the opponents tile connections. Add points based on how many they have, sine we're
//blocking their position
if (_tryToBlockOpponentsGoodConnections) {
rating += FindTilesInConnection(gameCore, tile, gameCore.GetOtherPlayer(player)).Count;
}
//Check what will happen once we play our tile. Does it open up any good positions?
//Do some planning stuff now:
//If placing a tile here will start a compulsion for us, add points
//If placing a tile here will block an opponents compulsion then add some points.
//Check the tile connections for the tile above this one. If the opponent would have good
//connections then subtract points. If we would have a good connections subtract points
//(since it alows the opponent to block us.
return rating;
}
/// <summary>
/// Method finds the amount of player tokens around the tile which are in a good connection
/// to it.
/// </summary>
public List<Tile> FindTilesInConnection(GameCore gameCore, Tile tile, Object player)
{
//To do this we get all the potential tile connections that contain this placeable tile.
var possibleConnections = AIHelper.FindFourTokenConnectionPossibilties(gameCore.Board, player);
var containingConnections = (from pc in possibleConnections
where pc.Tiles.Contains(tile)
select pc).ToList();
//And add points based on how many of our tokens in tile connections it is part of. More
//is better
var playerTilesInConnection = (from tc in containingConnections
from t in tc.Tiles
where t.OwningPlayer == player
select t).ToList();
return playerTilesInConnection;
}