netbeans 连接4检查是否存在获胜算法

1cosmwyk  于 2022-11-10  发布在  其他
关注(0)|答案(6)|浏览(168)

我知道有很多关于connect 4 check for a win的问题。问题是大多数其他算法使我的程序有运行时错误,因为他们试图访问我的数组之外的索引。我的算法是这样的:

private int checkWin(int[][] gridTable,int rowNum,int colNum, int maxRow, int maxCol) 
{
//  For checking whether any win or lose condition is reached. Returns 1 if win or lose is reached. else returns 0
//  gridTable[][] is the game matrix(can be any number of rows and columns between 4 and 40)
//  colNum is the column number where the last token was placed
//  rowNum is the row number where the last token was placed
//  maxRow is the number of rows in my grid
//  maxCol is the number of columns in my grid

int player = gridTable[rowNum][colNum]; //player ID
int count=0;

// Horizontal check
for (int i=0;i<maxCol;i++)
{
    if (gridTable[rowNum][i]==player)
        count++;
    else
        count=0;

    if (count>=4)
        return 1;
}
//Vertical check
for (int i=0;i<maxRow;i++)
{
    if (gridTable[i][colNum]==player)
        count++;
    else
        count=0;

    if (count>=4)
        return 1;
} 
count=0;
// 4 in a row diagonally
for(int i=colNum+1,j=rowNum+1;i<maxRow && j<maxCol;i++,j++) 
{ 
    if(gridTable[j][i]!=player)
    {
        count=1;
        break;        
    }
    count++;
}
// 4 in a row diagonally
for(int i=colNum-1,j=rowNum-1;i>=0 && j>=0;i--,j--) 
{ 
    if(gridTable[j][i]!=player)
    {
        count=1;
        break;        
    }
    count++;
}
// 4 in a row diagonally
for(int i=colNum+1,j=rowNum-1;i<maxRow && j>=0;i++,j--) 
{ 
    if(gridTable[j][i]!=player)
    {
        count=1;
        break;        
    }
    count++;
}

for(int i=colNum-1,j=rowNum+1;i>=0 && j<maxCol;i--,j++) 
{ // 4 in a row diagonally
    if(gridTable[j][i]!=player)
    {
        count=1;
        break;        
    }
    count++;
}

if(count>=4)
    return 1;

return 0;
}

count是变量,如果count等于或大于4意味着它们应该是同一玩家的4个或更多个连续代币,则该变量检查获胜。
问题:有时,该方法在没有4个令牌按顺序的情况下检查获胜,而在其他时候,当4个令牌按顺序时不检查获胜。

bvpmtnay

bvpmtnay1#

由于某种原因,我不是那么喜欢计数器,所以我这样做了(它适用于不同大小的电路板)。

public boolean areFourConnected(int player){

    // horizontalCheck 
    for (int j = 0; j<getHeight()-3 ; j++ ){
        for (int i = 0; i<getWidth(); i++){
            if (this.board[i][j] == player && this.board[i][j+1] == player && this.board[i][j+2] == player && this.board[i][j+3] == player){
                return true;
            }           
        }
    }
    // verticalCheck
    for (int i = 0; i<getWidth()-3 ; i++ ){
        for (int j = 0; j<this.getHeight(); j++){
            if (this.board[i][j] == player && this.board[i+1][j] == player && this.board[i+2][j] == player && this.board[i+3][j] == player){
                return true;
            }           
        }
    }
    // ascendingDiagonalCheck 
    for (int i=3; i<getWidth(); i++){
        for (int j=0; j<getHeight()-3; j++){
            if (this.board[i][j] == player && this.board[i-1][j+1] == player && this.board[i-2][j+2] == player && this.board[i-3][j+3] == player)
                return true;
        }
    }
    // descendingDiagonalCheck
    for (int i=3; i<getWidth(); i++){
        for (int j=3; j<getHeight(); j++){
            if (this.board[i][j] == player && this.board[i-1][j-1] == player && this.board[i-2][j-2] == player && this.board[i-3][j-3] == player)
                return true;
        }
    }
    return false;
}
igsr9ssn

igsr9ssn2#

看起来你的代码对于水平和垂直的情况都是正确的。棘手的部分是对角线的情况。
让我们试一幅:

对于绿色线,起始行位置为0... maxRow - 4。列位置为0... startingRow -
伪代码:

// top-left to bottom-right - green diagonals
for( rowStart = 0; rowStart < rowMax - 4; rowStart++){
    count = 0;
    int row, col;
    for( row = rowStart, col = 0; row < rowMax && col < colMax; row++, col++ ){
        if(gridTable[row][col] == player){
            count++;
            if(count >= 4) return 1;
        }
        else {
            count = 0;
        }
    }
}

// top-left to bottom-right - red diagonals
for( colStart = 1; colStart < colMax - 4; colStart++){
    count = 0;
    int row, col;
    for( row = 0, col = colStart; row < rowMax && col < colMax; row++, col++ ){
        if(gridTable[row][col] == player){
            count++;
            if(count >= 4) return 1;
        }
        else {
            count = 0;
        }
    }
}

你可以对对角线做一些类似的事情,从左下角到右上角。

u5rb5r59

u5rb5r593#

因此,在深入研究了您的代码之后,似乎对角线检查只能在一个方向上获胜(如果我在最低行和最低列中添加一个标记,会发生什么情况?)
相反,基本的检查算法始终是相同的过程,而不管您从哪个方向签入。
你需要一个起点(x/y)和x/y增量(运动方向)。你可以把这个总结成一个单一的方法...

public boolean didWin(int[][] grid, int check, int row, int col, int rowDelta, int colDelta) {

    boolean win = true;
    for (int count = 0; count < 4; count++) {
        if (row < ROWS && row >= 0 && col < COLUMNS && col >= 0) {
            int test = grid[row][col];
            if (test != check) {
                win = false;
                break;
            }
        }
        row += rowDelta;
        col += colDelta;
    }
    return win;

}

这将基本上允许您在四个方向上检查,但也可以反向进行
所以,如果我们用...

int[][] gridTable = new int[ROWS][COLUMNS];

gridTable[ROWS - 1][3] = 1;
gridTable[ROWS - 2][3] = 1;
gridTable[ROWS - 3][3] = 1;
gridTable[ROWS - 4][3] = 1;

System.out.println("Vertical");

System.out.println(didWin(gridTable, 1, ROWS - 4, 3, 1, 0) ? "Win" : "Lose");
System.out.println(didWin(gridTable, 1, ROWS - 1, 3, -1, 0) ? "Win" : "Lose");
System.out.println(didWin(gridTable, 1, 0, 3, 1, 0) ? "Win" : "Lose");

gridTable = new int[ROWS][COLUMNS];
gridTable[3][1] = 1;
gridTable[3][2] = 1;
gridTable[3][3] = 1;
gridTable[3][4] = 1;

System.out.println("");
System.out.println("Horizontal");
System.out.println(didWin(gridTable, 1, 3, 1, 0, 1) ? "Win" : "Lose");
System.out.println(didWin(gridTable, 1, 3, 4, 0, -1) ? "Win" : "Lose");
System.out.println(didWin(gridTable, 1, 3, 0, 0, 1) ? "Win" : "Lose");

gridTable = new int[ROWS][COLUMNS];
gridTable[0][1] = 1;
gridTable[1][2] = 1;
gridTable[2][3] = 1;
gridTable[3][4] = 1;

System.out.println("");
System.out.println("Diag");
System.out.println(didWin(gridTable, 1, 0, 1, 1, 1) ? "Win" : "Lose");
System.out.println(didWin(gridTable, 1, 3, 4, -1, -1) ? "Win" : "Lose");
System.out.println(didWin(gridTable, 1, 1, 2, 1, 1) ? "Win" : "Lose");

哪些输出...

Vertical
Win
Win
Lose

Horizontal
Win
Win
Lose

Diag
Win
Win
Lose

现在,你可以把它总结成...

public boolean didWin(int[][] grid, int check, int row, int col) {
    return didWin(grid, check, row, col, 1, 0) ||
                    didWin(grid, check, row, col, -1, 0) ||
                    didWin(grid, check, row, col, 0, 1) ||
                    didWin(grid, check, row, col, 0, -1) ||
                    didWin(grid, check, row, col, 1, 1) ||
                    didWin(grid, check, row, col, -1, -1) ||
                    didWin(grid, check, row, col, -1, 1) ||
                    didWin(grid, check, row, col, 1, -1);
}

所以,用这样的东西...

int[][] gridTable = new int[ROWS][COLUMNS];

gridTable[ROWS - 1][3] = 1;
gridTable[ROWS - 2][3] = 1;
gridTable[ROWS - 3][3] = 1;
gridTable[ROWS - 4][3] = 1;

System.out.println("Vertical");

System.out.println(didWin(gridTable, 1, ROWS - 1, 3) ? "Win" : "Lose");
System.out.println(didWin(gridTable, 1, ROWS - 4, 3) ? "Win" : "Lose");

gridTable = new int[ROWS][COLUMNS];
gridTable[3][1] = 1;
gridTable[3][2] = 1;
gridTable[3][3] = 1;
gridTable[3][4] = 1;

System.out.println("");
System.out.println("Horizontal");
System.out.println(didWin(gridTable, 1, 3, 1) ? "Win" : "Lose");
System.out.println(didWin(gridTable, 1, 3, 4) ? "Win" : "Lose");

gridTable = new int[ROWS][COLUMNS];
gridTable[0][1] = 1;
gridTable[1][2] = 1;
gridTable[2][3] = 1;
gridTable[3][4] = 1;

System.out.println("");
System.out.println("Diag");
System.out.println(didWin(gridTable, 1, 0, 1) ? "Win" : "Lose");
System.out.println(didWin(gridTable, 1, 3, 4) ? "Win" : "Lose");

它会打印出类似于...

Vertical
Win
Win

Horizontal
Win
Win

Diag
Win
Win

我想补充的是,这种方法只有在你提供了一行4个芯片的正确开始时才有效。例如,didWin(gridTable,1,3,3)将为你的水平检查提供false而不是true,因为循环只能检查一个方向。
它的目的不是提供一个“成熟的,开箱即用”的解决方案,而是一个概念,从这个概念可以开发出一个更广泛的解决方案(我的意思是,我讨厌人们实际上必须思考;))。我还基于OP会知道最后一块放在哪里的想法设计了这个解决方案,即起点;)
通过稍微修改didWin方法,可以从任意点检查n x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x

public boolean didWin(int[][] grid, int check, int row, int col, int rowDelta, int colDelta) {
    boolean match = false;
    int matches = 0;
    while (row < ROWS && row >= 0 && col < COLUMNS && col >= 0) {
        int test = grid[row][col];
        if (test != check && match) {
            break;
        } else if (test == check) {
            match = true;
            matches++;
        }
        row += rowDelta;
        col += colDelta;
    }
    return matches == 4;
}

所以,我用了...

public static final int ROWS = 8;
public static final int COLUMNS = 8;
//...
int[][] gridTable = new int[ROWS][COLUMNS];

gridTable[ROWS - 1][3] = 1;
gridTable[ROWS - 2][3] = 1;
gridTable[ROWS - 3][3] = 1;
gridTable[ROWS - 4][3] = 1;
for (int[] row : gridTable) {
    StringJoiner sj = new StringJoiner("|", "|", "|");
    for (int col : row) {
        sj.add(Integer.toString(col));
    }
    System.out.println(sj);
}
System.out.println(didWin(gridTable, 1, 3, 3));

有时候,答案并不是一个完整的解决方案,而是一个想法的种子,它把一个人带到一个新的地方;)
进一步的增强将包括提供预期的连接片段的数量,但我非常确定这是一个我真的不需要演示的增强;)

yzuktlbb

yzuktlbb4#

我用C语言做了我自己的版本,我认为用另一种语言重新解释它是很容易的。

//Return values: 1 for Player 1, 2 for Player 2 and 0 for a tie.
// '-' represents an empty tile, 'X' Player 1, 'O' Player 2

# include <stddef.h>

int connect4(char *game[], size_t columns, size_t lines)
{
    int winner = -1;
    for (size_t l = 0; l < lines; l++)
    {
        for (size_t c = 0; c < columns; c++)
        {
            char player = game[l][c];
            if (player == '-')
                continue;
            if (c + 3 < columns && player == game[l][c + 1]
                && player == game[l][c + 2] && player == game[l][c + 3])
                winner = winner < 0 ? player : 0;
            if (l + 3 < lines && player == game[l + 1][c]
                && player == game[l + 2][c] && player == game[l + 3][c])
                winner = winner < 0 ? player : 0;
            if (c + 3 < columns && l + 3 < lines && player == game[l + 1][c + 1]
                && player == game[l + 2][c + 2] && player == game[l + 3][c + 3])
                winner = winner < 0 ? player : 0;
            if (c >= 3 && l + 3 < lines && player == game[l + 1][c - 1]
                && player == game[l + 2][c - 2] && player == game[l + 3][c - 3])
                winner = winner < 0 ? player : 0;
        }
    }
    if (winner < 1)
        return 0;
    else
        return winner == 88 ? 1 : 2;
}
8ulbf1ek

8ulbf1ek5#

如果有人还需要这个解决方案,我会用C#编写一个函数,并放入GitHub repo中。

/// <summary>
    /// WinnerCalc check if blue or red win the game.
    /// </summary>
    /// <returns>Return 1 if 1 win and 2 if 2 win and -1 if no one win.</returns>
    /// <param name="matrix">2d array</param>
    /// <param name="lastRow">The row number.</param>
    /// <param name="lastColumn">The column number.</param>
    public static int WinnerCalc(int[,] matrix, int lastRow, int lastColumn)
    {
        int lastValue = matrix[lastRow, lastColumn];
        Console.WriteLine("drop in row: " + (lastRow) + " and column: " + (lastColumn) + " , the value is: " + lastValue);
        int rows = matrix.GetLength(0); //6
        int columns = matrix.GetLength(1); //7
        Console.WriteLine("number of rows is " + rows + ", and number of colums is " + columns);

        int numToWin = 4;
        int winner = -1;//is now one win tha game
        int match;

        match = 0;
        //check Horizontal
        for (int c = 0; c < columns; c++)
        {
            int currentValue = matrix[lastRow, c];
            if (currentValue == lastValue)
                match++;
            else match = 0;
            if(match == numToWin)
            {
                winner = lastValue;
                break;
            }
        }
        if (winner != -1)
        {
            Console.WriteLine("win Horizontal !");
            return winner;
        }

        match = 0;
        //check Vertical
        for (int r = 0; r < rows; r++)
        {
            int currentValue = matrix[r, lastColumn];
            if (currentValue == lastValue)
                match++;
            else match = 0;
            if (match == numToWin)
            {
                winner = lastValue;
                break;
            }
        }
        if (winner != -1)
        {
            Console.WriteLine("win Vertical !");
            return winner;
        }

        //check diagonal top-left to bottom-right - include middle
        match = 0;
        for (int r = 0; r <= rows - 4; r++)
        {
            int rowPosition = r;
            for (int column = 0; column < columns && rowPosition < rows; column++)
            {
                int currentValue = matrix[rowPosition, column];
                if (currentValue == lastValue)
                    match++;
                else match = 0;
                if (match == numToWin)
                {
                    winner = lastValue;
                    break;
                }
                rowPosition++;
            }
            if (winner != -1) break;
        }
        if (winner != -1)
        {
            Console.WriteLine("win Diagonal Top left! - include middle");
            return winner;
        }

        //check diagonal top-left to bottom-right - after middle
        match = 0;
        for (int c = 1; c <= columns - 4; c++)
        {
            int columnPosition = c;
            for (int row = 0; row < rows && columnPosition < columns; row++)
            {
                int currentValue = matrix[row, columnPosition];
                if (currentValue == lastValue)
                    match++;
                else match = 0;
                if (match == numToWin)
                {
                    winner = lastValue;
                    break;
                }
                columnPosition++;
            }
            if (winner != -1) break;
        }
        if (winner != -1)
        {
            Console.WriteLine("win Diagonal Top left! - after middle");
            return winner;
        }

        //check diagonal bottom-left to top-right - include middle
        match = 0;
        for (int r = rows - 1; r >= rows - 4; r--)
        {
            int rowPosition = r;
            for (int column = 0; column < columns && rowPosition < rows && rowPosition >= 0; column++)
            {
                int currentValue = matrix[rowPosition, column];
                if (currentValue == lastValue)
                    match++;
                else match = 0;
                if (match == numToWin)
                {
                    winner = lastValue;
                    break;
                }
                rowPosition--;
            }
            if (winner != -1) break;
        }
        if (winner != -1)
        {
            Console.WriteLine("win Diagonal Bottom left! - include middle");
            return winner;
        }

        //check diagonal bottom-left to top-right - after middle
        match = 0;
        for (int c = 1; c < columns; c++)
        {
            int columnPosition = c;
            for (int row = rows - 1; row < rows && columnPosition < columns && columnPosition >= 1; row--)
            {
                int currentValue = matrix[row, columnPosition];
                if (currentValue == lastValue)
                    match++;
                else match = 0;
                if (match == numToWin)
                {
                    winner = lastValue;
                    break;
                }
                columnPosition++;
            }
            if (winner != -1) break;
        }
        if (winner != -1)
        {
            Console.WriteLine("win Diagonal Bottom left! - after middle");
            return winner;
        }

        return winner; // no winner return -1
    }

}

这是回购协议:https://github.com/JoshK2/connect-four-winner

iyfamqjs

iyfamqjs6#

这就是对我起作用的方法,它也没有花看起来那么长的时间:
这些是对于x和o具有行、列、对角线和反对角的方法;

public static void checkVertO(){
    if (board[0][0] == 'O' && board[1][0] == 'O' && board[2][0] == 'O' && board[3][0] == 'O' || board[1][0] == 'O' && board[2][0] == 'O' && board[3][0] == 'O' && board[4][0] == 'O' ||
    board[2][0] == 'O' && board[3][0] == 'O' && board[4][0] == 'O' && board[5][0] == 'O' || board[0][1] == 'O' && board[1][1] == 'O' && board[2][1] == 'O' && board[3][1] == 'O' || 
    board[1][1] == 'O' && board[2][1] == 'O' && board[3][1] == 'O' && board[4][1] == 'O' || board[2][1] == 'O' && board[3][1] == 'O' && board[4][1] == 'O' && board[5][1] == 'O' || 
    board[0][2] == 'O' && board[1][2] == 'O' && board[2][2] == 'O' && board[3][2] == 'O' || board[1][2] == 'O' && board[2][2] == 'O' && board[3][2] == 'O' && board[4][2] == 'O' ||
    board[2][2] == 'O' && board[3][2] == 'O' && board[4][2] == 'O' && board[5][2] == 'O' || board[0][3] == 'O' && board[1][3] == 'O' && board[2][3] == 'O' && board[3][3] == 'O' || 
    board[1][3] == 'O' && board[2][3] == 'O' && board[3][3] == 'O' && board[4][3] == 'O' || board[2][3] == 'O' && board[3][3] == 'O' && board[4][3] == 'O' && board[5][3] == 'O' ||
    board[0][4] == 'O' && board[1][4] == 'O' && board[2][4] == 'O' && board[3][4] == 'O' || board[1][4] == 'O' && board[2][4] == 'O' && board[3][4] == 'O' && board[4][4] == 'O' ||
    board[2][4] == 'O' && board[3][4] == 'O' && board[4][4] == 'O' && board[5][4] == 'O' || board[0][5] == 'O' && board[1][5] == 'O' && board[2][5] == 'O' && board[3][5] == 'O' || 
    board[1][5] == 'O' && board[2][5] == 'O' && board[3][5] == 'O' && board[4][5] == 'O' || board[2][5] == 'O' && board[3][5] == 'O' && board[4][5] == 'O' && board[5][5] == 'O' ||
    board[0][6] == 'O' && board[1][6] == 'O' && board[2][6] == 'O' && board[3][6] == 'O' || board[1][6] == 'O' && board[2][6] == 'O' && board[3][6] == 'O' && board[4][6] == 'O'||
    board[2][6] == 'O' && board[3][6] == 'O' && board[4][6] == 'O' && board[5][6] == 'O'){
        System.out.println("Game over, O won.");
        printBoard();
        doIt();
    }else {
        return;
    }
}

public static void checkHorzO(){
    if (board[0][0] == 'O' && board[0][1] == 'O' && board[0][2] == 'O' && board[0][3] == 'O' || board[0][1] == 'O' && board[0][2] == 'O' && board[0][3] == 'O' && board[0][4] == 'O' ||
    board[0][2] == 'O' && board[0][3] == 'O' && board[0][4] == 'O' && board[0][5] == 'O' || board[0][3] == 'O' && board[0][4] == 'O' && board[0][5] == 'O' && board[0][6] == 'O' ||
    board[1][0] == 'O' && board[1][1] == 'O' && board[1][2] == 'O' && board[1][3] == 'O' || board[1][1] == 'O' && board[1][2] == 'O' && board[1][3] == 'O' && board[1][4] == 'O' ||
    board[1][2] == 'O' && board[1][3] == 'O' && board[1][4] == 'O' && board[1][5] == 'O' || board[1][3] == 'O' && board[1][4] == 'O' && board[1][5] == 'O' && board[1][6] == 'O' ||
    board[2][0] == 'O' && board[2][1] == 'O' && board[2][2] == 'O' && board[2][3] == 'O' || board[2][1] == 'O' && board[2][2] == 'O' && board[2][3] == 'O' && board[2][4] == 'O' ||
    board[2][2] == 'O' && board[2][3] == 'O' && board[2][4] == 'O' && board[2][5] == 'O' || board[2][3] == 'O' && board[2][4] == 'O' && board[2][5] == 'O' && board[2][6] == 'O' ||
    board[3][0] == 'O' && board[3][1] == 'O' && board[3][2] == 'O' && board[3][3] == 'O' || board[3][1] == 'O' && board[3][2] == 'O' && board[3][3] == 'O' && board[3][4] == 'O' ||
    board[3][2] == 'O' && board[3][3] == 'O' && board[3][4] == 'O' && board[3][5] == 'O' || board[3][3] == 'O' && board[3][4] == 'O' && board[3][5] == 'O' && board[3][6] == 'O' ||
    board[4][0] == 'O' && board[4][1] == 'O' && board[4][2] == 'O' && board[4][3] == 'O' || board[4][1] == 'O' && board[4][2] == 'O' && board[4][3] == 'O' && board[4][4] == 'O' ||
    board[4][2] == 'O' && board[4][3] == 'O' && board[4][4] == 'O' && board[4][5] == 'O' || board[4][3] == 'O' && board[4][4] == 'O' && board[4][5] == 'O' && board[4][6] == 'O' ||
    board[5][0] == 'O' && board[5][1] == 'O' && board[5][2] == 'O' && board[5][3] == 'O' || board[5][1] == 'O' && board[5][2] == 'O' && board[5][3] == 'O' && board[5][4] == 'O' ||
    board[5][2] == 'O' && board[5][3] == 'O' && board[5][4] == 'O' && board[5][5] == 'O' || board[5][3] == 'O' && board[5][4] == 'O' && board[5][5] == 'O' && board[5][6] == 'O' ){
        System.out.println("Game over, O won.");
        printBoard();
        doIt();
    }else {
        return;
    }
}

public static void checkHorzX(){
    if (board[0][0] == 'X' && board[0][1] == 'X' && board[0][2] == 'X' && board[0][3] == 'X' || board[0][1] == 'X' && board[0][2] == 'X' && board[0][3] == 'X' && board[0][4] == 'X' ||
    board[0][2] == 'X' && board[0][3] == 'X' && board[0][4] == 'X' && board[0][5] == 'X' || board[0][3] == 'X' && board[0][4] == 'X' && board[0][5] == 'X' && board[0][6] == 'X' ||
    board[1][0] == 'X' && board[1][1] == 'X' && board[1][2] == 'X' && board[1][3] == 'X' || board[1][1] == 'X' && board[1][2] == 'X' && board[1][3] == 'X' && board[1][4] == 'X' ||
    board[1][2] == 'X' && board[1][3] == 'X' && board[1][4] == 'X' && board[1][5] == 'X' || board[1][3] == 'X' && board[1][4] == 'X' && board[1][5] == 'X' && board[1][6] == 'X' ||
    board[2][0] == 'X' && board[2][3] == 'X' && board[2][4] == 'X' && board[2][5] == 'X' || board[2][3] == 'X' && board[2][4] == 'X' && board[2][5] == 'X' && board[2][6] == 'X' ||
    board[3][0] == 'X' && board[3][1] == 'X' && board[3][2] == 'X' && board[3][3] == 'X' || board[3][1] == 'X' && board[3][2] == 'X' && board[3][3] == 'X' && board[3][4] == 'X' ||
    board[3][2] == 'X' && board[3][3] == 'X' && board[3][4] == 'X' && board[3][5] == 'X' || board[3][3] == 'X' && board[3][4] == 'X' && board[3][5] == 'X' && board[3][6] == 'X' ||
    board[4][0] == 'X' && board[4][3] == 'X' && board[4][4] == 'X' && board[4][5] == 'X' || board[4][3] == 'X' && board[4][4] == 'X' && board[4][5] == 'X' && board[4][6] == 'X' ||
    board[5][0] == 'X' && board[5][1] == 'X' && board[5][2] == 'X' && board[5][3] == 'X' || board[5][1] == 'X' && board[5][2] == 'X' && board[5][3] == 'X' && board[5][4] == 'X' ||
    board[5][2] == 'X' && board[5][3] == 'X' && board[5][4] == 'X' && board[5][5] == 'X' || board[5][3] == 'X' && board[5][4] == 'X' && board[5][5] == 'X' && board[5][6] == 'X' ){
        System.out.println("Game over, X won.");
        printBoard();
        doIt();
    }else {
        return;
    }
}

public static void checkDiagX(){
    if (board[2][0] == 'X' && board[3][1] == 'X' && board[4][2] == 'X' && board[5][3] == 'X'|| board[1][0] == 'X' && board[2][1] == 'X' && board[3][2] == 'X' && board[4][3] == 'X'||
    board[0][0] == 'X' && board[1][1] == 'X' && board[2][2] == 'X' && board[3][3] == 'X'|| board[0][1] == 'X' && board[1][2] == 'X' && board[2][3] == 'X' && board[3][4] == 'X'||
    board[1][1] == 'X' && board[2][2] == 'X' && board[3][3] == 'X' && board[4][4] == 'X'|| board[2][1] == 'X' && board[3][2] == 'X' && board[4][3] == 'X' && board[5][4] == 'X'||
    board[0][2] == 'X' && board[1][3] == 'X' && board[2][4] == 'X' && board[3][5] == 'X'|| board[1][2] == 'X' && board[2][3] == 'X' && board[3][4] == 'X' && board[4][5] == 'X'||
    board[2][2] == 'X' && board[3][3] == 'X' && board[4][4] == 'X' && board[5][5] == 'X'|| board[0][3] == 'X' && board[1][4] == 'X' && board[2][5] == 'X' && board[3][6] == 'X'||
    board[1][3] == 'X' && board[2][4] == 'X' && board[3][5] == 'X' && board[4][6] == 'X'|| board[2][3] == 'X' && board[3][4] == 'X' && board[4][5] == 'X' && board[5][6] == 'X'){
        System.out.println("Game over, X won.");
        printBoard();
        doIt();
    }else {
        return;
    }
}

public static void checkDiagO(){
    if (board[2][0] == 'O' && board[3][1] == 'O' && board[4][2] == 'O' && board[5][3] == 'O'|| board[1][0] == 'O' && board[2][1] == 'O' && board[3][2] == 'O' && board[4][3] == 'O'||
    board[0][0] == 'O' && board[1][1] == 'O' && board[2][2] == 'O' && board[3][3] == 'O'|| board[0][1] == 'O' && board[1][2] == 'O' && board[2][3] == 'O' && board[3][4] == 'O'||
    board[1][1] == 'O' && board[2][2] == 'O' && board[3][3] == 'O' && board[4][4] == 'O'|| board[2][1] == 'O' && board[3][2] == 'O' && board[4][3] == 'O' && board[5][4] == 'O'||
    board[0][2] == 'O' && board[1][3] == 'O' && board[2][4] == 'O' && board[3][5] == 'O'|| board[1][2] == 'O' && board[2][3] == 'O' && board[3][4] == 'O' && board[4][5] == 'O'||
    board[2][2] == 'O' && board[3][3] == 'O' && board[4][4] == 'O' && board[5][5] == 'O'|| board[0][3] == 'O' && board[1][4] == 'O' && board[2][5] == 'O' && board[3][6] == 'O'||
    board[1][3] == 'O' && board[2][4] == 'O' && board[3][5] == 'O' && board[4][6] == 'O'|| board[2][3] == 'O' && board[3][4] == 'O' && board[4][5] == 'O' && board[5][6] == 'O'){
        System.out.println("Game over, O won.");
        printBoard();
        doIt();
    }else {
        return;
    }
}

public static void checkAntiDiagX(){
    if (board[3][0] == 'X' && board[2][1] == 'X' && board[1][2] == 'X' && board[0][3] == 'X'|| board[4][0] == 'X' && board[3][1] == 'X' && board[2][2] == 'X' && board[1][3] == 'X'||
    board[3][1] == 'X' && board[2][2] == 'X' && board[1][3] == 'X' && board[0][4] == 'X'|| board[5][0] == 'X' && board[4][1] == 'X' && board[3][2] == 'X' && board[2][3] == 'X'||        
    board[4][1] == 'X' && board[3][2] == 'X' && board[2][3] == 'X' && board[1][4] == 'X'|| board[3][2] == 'X' && board[2][2] == 'X' && board[1][4] == 'X' && board[0][5] == 'X'||
    board[5][1] == 'X' && board[4][2] == 'X' && board[3][3] == 'X' && board[2][4] == 'X'|| board[4][2] == 'X' && board[3][3] == 'X' && board[2][4] == 'X' && board[1][5] == 'X'||
    board[3][3] == 'X' && board[2][4] == 'X' && board[1][5] == 'X' && board[0][6] == 'X'|| board[5][2] == 'X' && board[4][3] == 'X' && board[3][4] == 'X' && board[2][5] == 'X'||
    board[4][3] == 'X' && board[3][4] == 'X' && board[2][5] == 'X' && board[1][6] == 'X'|| board[5][3] == 'X' && board[4][4] == 'X' && board[3][5] == 'X' && board[2][6] == 'X'){
        System.out.println("Game over, X won.");
        printBoard();
        doIt();
    }else {
        return;
    }
}

 public static void checkAntiDiagO(){
    if (board[3][0] == 'O' && board[2][1] == 'O' && board[1][2] == 'O' && board[0][3] == 'O'|| board[4][0] == 'O' && board[3][1] == 'O' && board[2][2] == 'O' && board[1][3] == 'O'||
    board[3][1] == 'O' && board[2][2] == 'O' && board[1][3] == 'O' && board[0][4] == 'O'|| board[5][0] == 'O' && board[4][1] == 'O' && board[3][2] == 'O' && board[2][3] == 'O'||        
    board[4][1] == 'O' && board[3][2] == 'O' && board[2][3] == 'O' && board[1][4] == 'O'|| board[3][2] == 'O' && board[2][2] == 'O' && board[1][4] == 'O' && board[0][5] == 'O'||
    board[5][1] == 'O' && board[4][2] == 'O' && board[3][3] == 'O' && board[2][4] == 'O'|| board[4][2] == 'O' && board[3][3] == 'O' && board[2][4] == 'O' && board[1][5] == 'O'||
    board[3][3] == 'O' && board[2][4] == 'O' && board[1][5] == 'O' && board[0][6] == 'O'|| board[5][2] == 'O' && board[4][3] == 'O' && board[3][4] == 'O' && board[2][5] == 'O'||
    board[4][3] == 'O' && board[3][4] == 'O' && board[2][5] == 'O' && board[1][6] == 'O'|| board[5][3] == 'O' && board[4][4] == 'O' && board[3][5] == 'O' && board[2][6] == 'O'){
        System.out.println("Game over, O won.");
        printBoard();
        doIt();
    }else {
        return;
    }
}

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