The goal of this assignment is to create a function that builds a 2D list (an 8x8 grid) filled with zeros and ones in a checkerboard pattern, then prints it nicely. 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 (And so on...) Why V2 is Harder Than V1

If the autograder says "You should set some elements of your board to 1," it means you must initialize the list first and then use grid[r][c] = 1 rather than just appending pre-made rows.

In Checkerboard v1, many students get away with simply printing the pattern. In V2, the autograder checks if you are actually creating a list of lists assignment statements to place the 1s and 0s. The Solution: Nested Loops & Modulus The best way to handle this is to iterate through rows ( ) and columns ( ). If the sum of the row and column indices is even, you place a ; otherwise, you place a Here is the cleanest way to pass the assignment: # Initialize an empty board # 8x8 board, so we use range(8) # Use modulus to determine alternating 1s and 0s : row.append( : row.append( ) board.append(row) # Print the board in the required format board: print(row) # Run the function Use code with caution. Copied to clipboard Key Takeaways for Success Initialize the board: Start with board = [] Create the list inside the first loop and append it to after the inner loop finishes. The Formula: (i + j) % 2 is the easiest way to alternate. Check Indentation:

Solving the 9.1.7 Checkerboard V2 puzzle requires a systematic approach. Here's a step-by-step guide to help you find the answers:

Remember that print_board is usually a pre-defined function in CodeHS that handles the join() logic to display the grid without brackets.