static int CheckAdjacentMove(GameBoard board, GameBoard.MinMax child_type, Colour player_colour, int x, int y, int a, int b,
int moves)
{
//check boundary of array
if (a >= 0 && a <= 3 && b >= 0 && b <= 3)
{
//check adjacent square is empty
if (board.ReturnPosition(a, b).stones == 0 || board.ReturnPosition(a, b).colour == player_colour)
{
//new child
GameBoard child = new GameBoard(child_type, board);
int stones = child.ReturnPosition(x, y).stones;
child.SetStones(x, y, 0, player_colour);
int original_stones = child.ReturnPosition(a, b).stones; //adjacent square
child.SetStones(a, b, stones+original_stones, player_colour);
//add child to parent
board.AddChildren(child);
//displayBoard(child);
moves++;
}
}
return moves;
}
static int CheckTwoSquares(GameBoard board, GameBoard.MinMax child_type, Colour player_colour, int x, int y,
int a, int b, int c, int d, int moves)
{
//check boundary of array
if (a >= 0 && a <= 3 && b >= 0 && b <= 3)
{
//check adjacent square is empty
if (board.ReturnPosition(a, b).stones == 0 || board.ReturnPosition(a, b).colour == player_colour)
{
if (c >= 0 && c <= 3 && d >= 0 && d <= 3)
{
if (board.ReturnPosition(c, d).stones == 0 || board.ReturnPosition(c, d).colour == player_colour)
{
//new child
GameBoard child = new GameBoard(child_type, board);
int stones = child.ReturnPosition(x, y).stones;
child.SetStones(x, y, 0, player_colour);
int original_stones = child.ReturnPosition(a, b).stones;
child.SetStones(a, b, original_stones + 1, player_colour); //first square
stones--; //one stone moved into a,b
original_stones = child.ReturnPosition(c, d).stones; //rest of stones moved into c,d
child.SetStones(c, d, stones + original_stones, player_colour); //second square
//add child to parent
board.AddChildren(child);
//displayBoard(child);
moves++;
}else
{
moves = CheckAdjacentMove(board, child_type, player_colour, x, y, a, b, moves);
}
}
else
{
moves = CheckAdjacentMove(board, child_type, player_colour, x, y, a, b, moves);
}
}else
{
moves = CheckAdjacentMove(board, child_type, player_colour, x, y, a, b, moves);
}
}
return moves;
}
static int CalculateMoves(GameBoard board)
{
/* goes through all the possible moves
* on a gameboard
* returns number of moves
*/
int moves = 0;
Colour player_colour = Colour.NONE;
GameBoard.MinMax child_type = GameBoard.MinMax.Null;
if (board.GetNodeType() == GameBoard.MinMax.Max)
{
player_colour = Colour.BLACK;
child_type = GameBoard.MinMax.Min;
}else if (board.GetNodeType() == GameBoard.MinMax.Min)
{
player_colour = Colour.WHITE;
child_type = GameBoard.MinMax.Max;
}
for (int x = 0; x <= 3; x++)
{
for (int y = 0; y <= 3; y++)
{
if (board.ReturnPosition(x,y).stones > 0 && board.ReturnPosition(x,y).colour == player_colour)
{
//if statement to sort number of stones
//1-2 stones = 1 square
if (board.ReturnPosition(x, y).stones == 1 || board.ReturnPosition(x, y).stones == 2)
{
//north
int a = x;
int b = y + 1;
moves = CheckAdjacentMove(board, child_type, player_colour, x, y, a, b, moves);
//south
a = x;
b = y - 1;
moves = CheckAdjacentMove(board, child_type, player_colour, x, y, a, b, moves);
//east
a = x - 1;
b = y;
moves = CheckAdjacentMove(board, child_type, player_colour, x, y, a, b, moves);
//west
a = x + 1;
b = y;
moves = CheckAdjacentMove(board, child_type, player_colour, x, y, a, b, moves);
//ne
a = x + 1;
b = y - 1;
moves = CheckAdjacentMove(board, child_type, player_colour, x, y, a, b, moves);
//nw
a = x - 1;
b = y - 1;
moves = CheckAdjacentMove(board, child_type, player_colour, x, y, a, b, moves);
//se
a = x + 1;
b = y + 1;
moves = CheckAdjacentMove(board, child_type, player_colour, x, y, a, b, moves);
//sw
a = x - 1;
b = y + 1;
moves = CheckAdjacentMove(board, child_type, player_colour, x, y, a, b, moves);
}
else if (board.ReturnPosition(x, y).stones == 3)//3 stones = 2 squares
{
//north x2
int a = x;
int b = y + 1;
int c = x;
int d = y + 2;
moves = CheckTwoSquares(board, child_type, player_colour, x, y, a, b, c, d, moves);
//south x2
a = x;
b = y - 1;
c = x;
d = y - 2;
moves = CheckTwoSquares(board, child_type, player_colour, x, y, a, b, c, d, moves);
//eastx2
a = x - 1;
b = y;
c = x - 2;
d = y;
moves = CheckTwoSquares(board, child_type, player_colour, x, y, a, b, c, d, moves);
//westx2
a = x + 1;
b = y;
c = x + 2;
d = y;
moves = CheckTwoSquares(board, child_type, player_colour, x, y, a, b, c, d, moves);
//nex2
a = x + 1;
b = y - 1;
c = x + 2;
d = y - 2;
moves = CheckTwoSquares(board, child_type, player_colour, x, y, a, b, c, d, moves);
//nwx2
a = x - 1;
b = y - 1;
c = x - 2;
d = y - 2;
moves = CheckTwoSquares(board, child_type, player_colour, x, y, a, b, c, d, moves);
//se x2
a = x + 1;
b = y + 1;
c = x + 2;
d = y + 2;
moves = CheckTwoSquares(board, child_type, player_colour, x, y, a, b, c, d, moves);
//swx2
a = x - 1;
b = y + 1;
c = x - 2;
d = y + 2;
moves = CheckTwoSquares(board, child_type, player_colour, x, y, a, b, c, d, moves);
}
else // 4+ stones = 3 squares
{
//north x3
int a = x;
int b = y + 1;
int c = x;
int d = y + 2;
int e = x;
int f = y + 3;
moves = CheckThreeSquares(board, child_type, player_colour, x, y, a, b, c, d, e, f, moves);
//south x3
a = x;
b = y - 1;
c = x;
d = y - 2;
e = x;
f = y - 3;
moves = CheckThreeSquares(board, child_type, player_colour, x, y, a, b, c, d, e, f, moves);
//westx3
a = x - 1;
b = y;
c = x - 2;
d = y;
e = x - 3;
f = y;
moves = CheckThreeSquares(board, child_type, player_colour, x, y, a, b, c, d, e, f, moves);
//eastx3
a = x + 1;
b = y;
c = x + 2;
d = y;
e = x + 3;
f = y;
moves = CheckThreeSquares(board, child_type, player_colour, x, y, a, b, c, d, e, f, moves);
//nex3
a = x + 1;
b = y + 1;
c = x + 2;
d = y + 2;
e = x + 3;
f = y + 3;
moves = CheckThreeSquares(board, child_type, player_colour, x, y, a, b, c, d, e, f, moves);
//nwx3 //---------????
a = x - 1;
b = y + 1;
c = x - 2;
d = y + 2;
e = x - 3;
f = y + 3;
moves = CheckThreeSquares(board, child_type, player_colour, x, y, a, b, c, d, e, f, moves);
//se x3
a = x + 1;
b = y - 1;
c = x + 2;
d = y - 2;
e = x + 3;
f = y - 3;
moves = CheckThreeSquares(board, child_type, player_colour, x, y, a, b, c, d, e, f, moves);
//swx3
a = x - 1;
b = y - 1;
c = x - 2;
d = y - 2;
e = x - 3;
f = y - 3;
moves = CheckThreeSquares(board, child_type, player_colour, x, y, a, b, c, d, e, f, moves);
}
}
}
}
//store moves in parent - number of squares covereed - failed eval fxn
/* int squares = 0;
for (int x = 0; x < 4; x++)
{
for (int y = 0; y < 4; y++)
{
if (board.ReturnPosition(x, y).colour == player_colour)
{
squares++;
}
}
}
board.SetAlphaBetaValue(squares);
return squares;
*/
board.SetAlphaBetaValue(moves);
return moves;
}