You must use board[row][col] = 1 . The autograder specifically looks for the = assignment operator being used on the list elements.
In this assignment, your goal is to build the initial framework for a checkers game board. The program's task is to create an 8x8 grid where the number 1 represents a checker piece and 0 represents an empty square.
This guide breaks down the core logic, provides the corrected code structure, and explains how to fix the placement algorithms. Understanding the Logic Behind a Checkerboard 916 checkerboard v1 codehs fixed
public class Checkerboard public static void main(String[] args) // Create an 8x8 checkerboard grid int[][] board = new int[8][8]; // Populate the checkerboard using the fixed logic for (int row = 0; row < board.length; row++) for (int col = 0; col < board[row].length; col++) // The Sum Math Trick: Even sums get 0, Odd sums get 1 if ((row + col) % 2 == 0) board[row][col] = 0; else board[row][col] = 1; // Print the grid to verify the fix printBoard(board); public static void printBoard(int[][] matrix) for (int[] row : matrix) for (int cell : row) System.out.print(cell + " "); System.out.println(); Use code with caution. Code Breakdown: How the Fix Works
function is defined outside your main loop to avoid scope issues. Incorrect Indexing : The middle rows (index 3 and 4) must remain . Your loop conditions should only target rows Step-by-Step Implementation Initialize the Grid list of lists filled entirely with ): my_grid.append([ Use code with caution. Copied to clipboard Use Nested Loops to Assign Values You must use board[row][col] = 1
Let's break down the fixed code:
: Karel checks if there is room to move again before placing the next beeper. This prevents errors on narrow boards. 3. The repositionToNextRow() Function The program's task is to create an 8x8
The outer loop tracks the rows down the vertical y-axis. The inner loop tracks the columns across the horizontal x-axis.
to create a checkerboard pattern in the top and bottom three rows, while leaving the middle two rows as
The "fixed" code addresses these by ensuring the loop parameters match the grid dimensions precisely and that the offset logic ( row + col ) is implemented correctly.
According to the official instructions for 9.1.6 Checkerboard, v1 , the grid is structured with the top three rows and the bottom three rows filled with an alternating pattern of 1 s and 0 s. The middle two rows are left completely blank, filled entirely with 0 s. The final board should have a structure that looks like this: