916 Checkerboard V1 Codehs Fixed Exclusive Jun 2026

: Instead of wrapping back to the left wall every time, Karel moves across the board in a zigzag pattern (East-to-West, then West-to-East), which vastly reduces the total line count of your code.

However, getting the "fixed" version—where the grid perfectly alternates colors without overlapping or skipping—can be tricky. The objective is to create an

If you are stuck on a specific autograder test case for this assignment, let me know you are getting or the grid dimensions where Karel fails. Share public link

To pass, you must first initialize a grid full of zeros and then use nested 916 checkerboard v1 codehs fixed

: putRow() immediately drops a ball, moves twice, and drops another. putRowRows() moves first, drops a ball, and then moves again.

Using the same variable (like i ) for both loops. This causes the loops to crash into each other.

for each row in range(rows): for each col in range(cols): x = col * square_size y = row * square_size if (row + col) % 2 == 0: set fill color to red else: set fill color to black draw square at (x, y) with size square_size : Instead of wrapping back to the left

This part builds the checkerboard pattern.

To fix the CodeHS exercise, the key is not just printing the right visual output, but correctly modifying a list of lists using nested for loops and assignment statements . The Correct Logic

Whether you're working in JavaScript with graphics, Python for console output, or Karel the Robot, the core principles remain the same: break down the problem, plan your approach, implement systematically, and debug thoroughly. With these skills, you'll be well-prepared for the subsequent versions (v2 and v3) of the Checkerboard problem, which introduce additional complexity and programming concepts. Share public link To pass, you must first

In reality, there’s rarely one single "fixed" version of the code. What's more important is understanding the specific issues in your personal approach. Here are the most common reasons a beginner's submission fails:

Why is the "fixed" version necessary? The "v1" designation implies an iterative process. Common errors in the unfixed versions include: