The goal of Checkerboard V2 is to create a grid-like pattern of "markers" or "beepers" on a canvas of any size. Unlike the first version, V2 often requires the program to be dynamic—meaning it must work whether the grid is
If (row + col) % 2 != 0 , the cell gets the alternating value (e.g., 0, or the opposite color). Visual Example of Index Sums: Top-left cell: Row 0, Column 0 Next cell right: Row 0, Column 1 Next cell down: Row 1, Column 0 Diagonal cell: Row 1, Column 1 9.1.7 Checkerboard V2 Codehs
def start(): # 1. Initialize an 8x8 grid filled with 0s rows = 8 cols = 8 board = [] for i in range(rows): row = [] for j in range(cols): row.append(0) board.append(row) # 2. Use nested loops to fill in the 1s for row in range(rows): for col in range(cols): # The checkerboard logic: # If the sum of indices is odd, make it 1 if (row + col) % 2 == 1: board[row][col] = 1 # 3. Print the board (as required by the exercise) for row in board: print(row) # Run the function start() Use code with caution. Explanation of the Code The goal of Checkerboard V2 is to create
Constructing a base 8x8 list grid populated strictly with 0 flat lines. Initialize an 8x8 grid filled with 0s rows
Do not use hardcoded numbers like 8 in your loops unless explicitly told to do so. Always use .length so your code works dynamically regardless of the grid size CodeHS tests against. Conclusion
Fill the grid coordinates with the required elements or color calls specified by your prompt instructions. Common Pitfalls and Troubleshooting