9.1.6 Checkerboard V1 Codehs Extra Quality Jun 2026

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grid, a checkerboard pattern alternates colors. If you look at the coordinates of any square: Square (0,0) is Color A. Square (0,1) is Color B. Square (1,0) is Color B. Square (1,1) is Color A.

# Function to print the board in the required format def print_board(board): for row in board: # Join the numbers with a space print(" ".join(map(str, row))) def main(): # 1. Initialize an empty board with 8 rows and 8 columns of zeros board = [] for i in range(8): board.append([0] * 8) # 2. Modify the board: Set specific elements to 1 # Example logic: Make top 3 rows all 1s for row in range(3): for col in range(8): board[row][col] = 1 # Alternatively, you can fill the whole board with a checkerboard # or specific pattern, but 3 rows of 1s is a common requirement. # 3. Print the resulting board print_board(board) main() Use code with caution. 4. Key Takeaways for Success A. List Initialization Proof of correctness: Ready to tackle the 9

The prompt for this exercise typically reads something like this:

for i in range(8): # Only modify the top 3 and bottom 3 rows if i < 3 or i > 4: for j in range(8): # If the sum of indices is even, set to 1 if (i + j) % 2 == 0: board[i][j] = 1 Use code with caution. Copied to clipboard 3. Print the Result If you look at the coordinates of any

). Floor division ( // ) automatically calculates that each SQUARE_SIZE must be 50 pixels.

1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 0 1 0 1 0 1