如何在Java中为Checkers Game实现MINIMAX算法？

如何解决如何在Java中为Checkers Game实现MINIMAX算法？

这是到目前为止的代码，需要在主类之前的下面添加Minimax算法（函数）。 我试图理解此伪代码，因此可以将其应用于我的案例。不幸的是，我无法真正理解。

function minimax(node,depth,maximizingPlayer) is
if depth = 0 or node is a terminal node then
return the heuristic value of node
if maximizingPlayer then
value := −∞
for each child of node do
value := max(value,minimax(child,depth − 1,FALSE))
return value
else (* minimizing player *)
value := +∞
for each child of node do
value := min(value,TRUE))
return value

import java.awt.*;
import javax.swing.*;
import java.applet.*;
import java.net.*;

public class Checkers extends JFrame {

    private static int [][] boardPlan = {
        {0,0},//*** blue pieces become king here
        {0,{0,1},{1,4,3,2,0}    //*** red pieces become king here
    };

    //*** the legend strings
    private String[] legend = {"blank","bs","bk","rs","rk" };

    //*** create the checkers board
    private GameBoard board;

    //*** the xy dimensions of each checkers cell on board
    private int cellDimension;

    //*** pause in seconds inbetween moves
    private static int pauseDuration = 500;

    Checkers() {
        //*** set up the initial configuration of the board
        board = new GameBoard(boardPlan);

        //*** each board cell is 70 pixels long and wide
        cellDimension = 70;

        //*** set up the frame containign the board
        getContentPane().setLayout(new GridLayout());
        setSize(boardPlan.length * cellDimension,boardPlan.length * cellDimension);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        getContentPane().add(board);

        //*** enable viewer
        setVisible(true);

        //*** place all initial pieces on board and pause a bit
        putInitialPieces();
        pause(2 * pauseDuration);
    }

    public void pause(int milliseconds) {
        try
        {Thread.sleep(milliseconds);}

        catch (Exception e)
        {}
    }

    void putPiece(int i,int j,String piece) {
        //*** can do error checking here to make sure pieces are bs,bk,rs,rk
        board.drawPiece(i,j,"images/" + piece + ".jpg");
    }

    void putInitialPieces() {
        //*** use legend variables to draw one piece at a time
        for (int i = 0; i < boardPlan.length; i++)
            for (int j = 0; j < boardPlan.length; j++)
                if (boardPlan[i][j] != 0)
                { board.drawPiece(i,"images/" + legend[boardPlan[i][j]] + ".jpg"); }
    }

    boolean legalPosition(int i) {
        //*** can't go outside board boundaries
        return ((i >= 0) && (i < boardPlan.length));
    }

    void movePiece(int i1,int j1,int i2,int j2,String piece) {
        //*** raise exception if outside the board or moving into a non-empty
        //*** cell
        if ((boardPlan[i2][j2] != 0) || !legalPosition(i1) || !legalPosition(i2)
                || !legalPosition(j1) || !legalPosition(j1))
        { throw new IllegalMoveException("An illegal move was attempted."); }

        //*** informative console messages
        System.out.println("Moved " + piece + " from position [" +
                           i1 + "," + j1 + "] to [" + i2 + "," + j2 + "]");

        //*** erase the old cell
        board.drawPiece(i1,j1,"images/blank.jpg");

        //*** draw the new cell
        board.drawPiece(i2,j2,"images/" + piece + ".jpg");

        //*** erase any captured piece from the board
        if ((Math.abs(i1 - i2) == 2) && (Math.abs(j1 - j2) == 2)) {
            //*** this handles  hops of length 2
            //*** the captured piece is halfway in between the two moves
            int captured_i = i1 + (i2 - i1) / 2;
            int captured_j = j1 + (j2 - j1) / 2;

            //*** now wait a bit
            pause(pauseDuration);

            //*** erase the captured cell
            board.drawPiece(captured_i,captured_j,"images/blank.jpg");

            //*** print which piece was captured
            System.out.println("Captured " + legend[boardPlan[captured_i][captured_j]] +
                               " from position [" + captured_i + "," + captured_j + "]");

            //*** the captured piece is removed from the board with a bang
            boardPlan[captured_i][captured_j] = 0;
            Applet.newAudioClip(getClass().getResource("images/hit.wav")).play();
        }

        //*** update the internal representation of the board by moving the old
        //*** piece into its new position and leaving a blank in its old position
        boardPlan[i2][j2] = boardPlan[i1][j1];
        boardPlan[i1][j1] = 0;

        //*** red single is kinged
        if ( (i2 == boardPlan.length - 1) && (boardPlan[i2][j2] == 3) ) {
            boardPlan[i2][j2] = 4;
            putPiece(i2,"rk");
        }

        //*** blue single is kinged
        if ( (i2 == 0) && (boardPlan[i2][j2] == 1) ) {
            boardPlan[i2][j2] = 2;
            putPiece(i2,"bk");
        }

        //*** now wait a bit
        pause(pauseDuration);
    }

    //*** incorporate your MINIMAX algorithm in here
    //***********************************************************************
    public static void main(String [] args) {
        //*** create a new game and make it visible
        Checkers game = new Checkers();


        //*** arbitrarily move a few pieces around
        //while (!game.done())
        {
            try {
                //*** move a bs piece from board[4][7] to board[3][6]
                game.movePiece(4,7,6,"bs");

                //*** move the rk from board[5][2] to board[4][1]
                game.movePiece(5,1,"rk");

                //*** move a bs piece from board[5][0] to board[3][2]
                //*** must capture rk in position board[4][1]
                game.movePiece(5,"bs");

                //*** move the bk from board[7][4] to board[6]1]
                game.movePiece(7,"bk");

                //*** move the rs from board[5][4] to board[7][2]
                game.movePiece(5,"rs");

                //*** a few more moves just for fun
                game.movePiece(3,"bs");
                game.movePiece(2,"bs");
                game.movePiece(1,5,"bs");
                game.movePiece(3,"bs");

            } catch (IllegalMoveException e)
            {e.printStackTrace();}
        }
    }
}

我一直在尝试寻找解决方案的几天，但是找不到与上面的代码相关联的正确解决方案。感谢您的时间和解决方案。谢谢！