11111111 11111111 11111111 00000000 00000000 11111111 11111111 11111111
The 916 Checkerboard problem on CodeHS is a classic challenge that requires creating a checkerboard pattern using a loop. Here is a fixed and well-documented solution:
The for 9.1.6 Checkerboard (v1) on CodeHS hinges on the simple yet powerful condition (row + col) % 2 == 0 . Whether you’re using Java or JavaScript, ensure your loops run correctly, you set filled to true, and you apply the alternating logic precisely. 916 checkerboard v1 codehs fixed
If you paste your or the exact error message from CodeHS, I can give you the exact line-by-line fix. Would you like that?
: The outer loop iterates through each row index ( i ). The if i < 3 or i > 4 condition identifies the rows where checkers should be placed (the first three and last three). If you paste your or the exact error
Now go ahead — copy the fixed code above, run it, and watch your perfect checkerboard appear. Then celebrate passing the autograder with full points!
This is the "aha!" moment for the assignment. It teaches that patterns in computer science are often mathematical. By checking if the sum of the coordinates is even or odd, the code automatically creates the staggered pattern required for a checkerboard, regardless of the grid size. The if i 4 condition identifies the rows
If your code still doesn’t work after checking the logic above:
Your checkerboard looks like vertical stripes instead of alternating squares.
This report includes the , Algorithm Analysis , the Corrected Code Solution , and a detailed Code Breakdown to ensure the "fixed" requirements are met (specifically addressing the common issue where the code runs infinitely or crashes due to missing decrement logic).
The most common mistake in "v1" is only checking if the column is even or odd. If you do that, every row will look identical, resulting in vertical stripes rather than a checkerboard. Use the sum of the row and column indices. If (row + col) is even , color it Red. If (row + col) is odd , color it Black. The Corrected Code (JavaScript/Karel Style)