//public Dictionary<Point, CheckerPiece> CheckerPieceMap { get; set; }
//copy constructor
public CheckerBoard(CheckerBoard other)
{
Board = other.Board;
MustJump = new[] { other.MustJump[0], other.MustJump[1] };
SelectedPiece = null;
JumpMade = null;
AllPieces = new List<CheckerPiece>(other.AllPieces.Count());
for (var i = 0; i < other.AllPieces.Count(); i++)
{
AllPieces.Add(new CheckerPiece(other.AllPieces[i].Row, other.AllPieces[i].Col, other.AllPieces[i].Color, other.AllPieces[i].Status));
if (other.JumpMade == null) continue;
if (other.AllPieces[i] == other.JumpMade)
{
JumpMade = AllPieces[i];
}
}
}
public List<MoveSet> CheckJumpMove(CheckerBoard currentBoard, CheckerPiece piece)
{
var row = piece.Row;
var col = piece.Col;
var jumpMoves = new List<MoveSet>();
var possibleLocation = new List<Point>{new Point(1, -1), new Point(1, 1), new Point(-1, -1), new Point(-1, 1)};
//Goes to each adjacent tile
foreach(var location in possibleLocation)
{
//Get the adjacent piece that will be jumped
var targetPiece = currentBoard.GetCheckerPiece(row + location.X, col + location.Y);
//if the piece exists and the color is the opposite color
if (targetPiece != null && targetPiece.Color != piece.Color)
{
//Check if there is a empty space after that piece and there is no piece at the location
if (Board.CheckValidTile(row + 2 * location.X, col + 2 * location.Y) && currentBoard.GetCheckerPiece(row + 2 * location.X, col + 2 * location.Y) == null)
{
var jump = new MoveSet(row + 2 * location.X, col + 2 * location.Y);
//Check continuous jumps
//Generate a copy of the board
var nextBoard = new CheckerBoard(currentBoard);
nextBoard.SelectedPiece = nextBoard.GetCheckerPiece(piece.Row, piece.Col);
nextBoard.MustJump[piece.Color] = true;
//Move
nextBoard.HandleMove(row + 2 * location.X, col + 2 * location.Y);
//Keep checking for jump moves
var nextJumps = CheckJumpMove(nextBoard, nextBoard.SelectedPiece);
if (nextJumps.Any())
{
foreach (var nextJump in nextJumps)
{
var branch = new MoveSet(jump);
branch.MoveList.AddRange(nextJump.MoveList);
jumpMoves.Add(branch);
}
}
else
{
jumpMoves.Add(jump);
}
}
}
}
return jumpMoves;
}
int MinValue(CheckerBoard currentBoard, int depth, int alpha, int beta, int currentPlayer)
{
if (_nodeGeneration % 10000 == 0 && _nodeGeneration != 0)
{
Console.WriteLine("Max Depth: {0}", _maxDepth);
Console.WriteLine("# of Pruning in Max: {0}", _maxPruning);
Console.WriteLine("# of Pruning in Min: {0}", _minPruning);
Console.WriteLine("# of Node Generated: {0}", _nodeGeneration);
Console.WriteLine("Time Elapsed: {0}", TimeElapsed);
}
CheckerStatus status = currentBoard.GetStatus(_currentTurn);
if (status != CheckerStatus.Continue)
{
return (int) status;
}
_maxDepth = Math.Max(_maxDepth, depth);
if (depth == Difficulty )
return currentBoard.EvaluateBoard(_currentTurn);
int v = 999;
//For each movable piece
for (var i = 0; i < currentBoard.MovablePieces[currentPlayer].Count(); i++)
{
//for each possible positions that the piece can go
for (var j = 0; j < currentBoard.MoveDict[currentBoard.MovablePieces[currentPlayer][i]].Count(); j++)
{
_nodeGeneration++;
//For each possible move make a new checkerboard and move it
var newCheckerBoard = new CheckerBoard(currentBoard);
var selectedPiece = newCheckerBoard.GetCheckerPiece(currentBoard.MovablePieces[currentPlayer][i].Row, currentBoard.MovablePieces[currentPlayer][i].Col);
newCheckerBoard.SelectedPiece = selectedPiece;
newCheckerBoard.HandleMove(currentBoard.MoveDict[currentBoard.MovablePieces[currentPlayer][i]][j]);
newCheckerBoard.CheckAllAvailableMoves();
int nextTurn = newCheckerBoard.AINextTurn(currentPlayer);
v = Math.Min(v, MaxValue(newCheckerBoard, depth + 1, alpha, beta, nextTurn));
//pruning
if (v <= alpha)
{
_minPruning++;
return v;
}
if (v < beta)
{
beta = v;
if (currentBoard == _checkerBoard)
{
_bestMoveSet = currentBoard.MoveDict[currentBoard.MovablePieces[currentPlayer][i]][j];
_bestPiece = currentBoard.MovablePieces[currentPlayer][i];
}
}
}
}
return v;
}
//Gets the Max Value
int MaxValue(CheckerBoard currentBoard, int depth, int alpha, int beta, int currentPlayer)
{
if (_nodeGeneration % 10000 == 0 && _nodeGeneration !=0)
{
Console.WriteLine("Max Depth: {0}", _maxDepth);
Console.WriteLine("# of Pruning in Max: {0}", _maxPruning);
Console.WriteLine("# of Pruning in Min: {0}", _minPruning);
Console.WriteLine("# of Node Generated: {0}", _nodeGeneration);
Console.WriteLine("Time Elapsed: {0}", TimeElapsed);
}
//Checks to see if it is a utility value
CheckerStatus status = currentBoard.GetStatus(_currentTurn);
//If it is return the value
if (status != CheckerStatus.Continue)
{
return (int) status;
}
_maxDepth = Math.Max(_maxDepth, depth);
//Depth Limiter
if (depth == Difficulty )
return currentBoard.EvaluateBoard(_currentTurn);
var v = -999;
//Iterate through every movable pieces
for (var i = 0; i < currentBoard.MovablePieces[currentPlayer].Count(); i++)
{
//Iterate through every possible move for the selected piece
for (var j = 0; j < currentBoard.MoveDict[currentBoard.MovablePieces[currentPlayer][i]].Count(); j++)
{
//Increment node counter
_nodeGeneration++;
//For each possible move make a new checkerboard and move it
var newCheckerBoard = new CheckerBoard(currentBoard);
//Select the piece that will be moved
var selectedPiece = newCheckerBoard.GetCheckerPiece(currentBoard.MovablePieces[currentPlayer][i].Row, currentBoard.MovablePieces[currentPlayer][i].Col);
newCheckerBoard.SelectedPiece = selectedPiece;
//Move the piece to a piece location
newCheckerBoard.HandleMove(currentBoard.MoveDict[currentBoard.MovablePieces[currentPlayer][i]][j]);
newCheckerBoard.CheckAllAvailableMoves();
var nextTurn = newCheckerBoard.AINextTurn(currentPlayer);
v = Math.Max(v, MinValue(newCheckerBoard, depth + 1, alpha, beta, nextTurn));
if (v >= beta)
{
_maxPruning++;
return v;
}
if (v > alpha)
{
alpha = v;
if (currentBoard == _checkerBoard)
{
_bestMoveSet = currentBoard.MoveDict[currentBoard.MovablePieces[currentPlayer][i]][j];
_bestPiece = currentBoard.MovablePieces[currentPlayer][i];
}
}
}
}
return v;
}
void AlphaBetaSearch(CheckerBoard currentBoard, int playerColor)
{
_maxPruning = 0;
_minPruning = 0;
_maxDepth = 0;
TimeElapsed = 0;
MaxValue(currentBoard, 0, -999, 999, playerColor);
}
/// <summary>
/// Allows the game to perform any initialization it needs to before starting to run.
/// This is where it can query for any required services and load any non-graphic
/// related content. Calling base.Initialize will enumerate through any components
/// and initialize them as well.
/// </summary>
protected override void Initialize()
{
_maxPruning = 0;
_minPruning = 0;
_maxDepth = 0;
_timer = 0;
_nodeGeneration = 0;
_checkerBoard = new CheckerBoard(Rows, Cols);
_cam = new Camera {Pos = new Vector2(0, 0)};
_particleManager = new ParticleManager();
_screenManager = new UIScreenManager();
_setupForm = new SetupForm(this);
_drawDriver = new DrawDriver();
base.Initialize();
}
