The horizontal position depends entirely on the current column index c . Column 0 starts at , Column 1 starts at , and so on.
The ultimate goal is a board that looks something like this:
First, you'll need an empty list to hold your board. 9.1.6 checkerboard v1 codehs
CodeHS expects a specific output format. The print(" ".join(map(str, row))) line is an efficient way to convert each integer 0 or 1 in a row into a string, and then join them together with a space in between.
Check that your loop runs exactly 8 times. If it goes to 10, the circles will disappear off the right side. The horizontal position depends entirely on the current
function main() while (leftIsClear()) fillRow(); repositionToNextRow(); // Fill the very last row fillRow(); // Fills a row with the checkerboard pattern function fillRow() while (frontIsClear()) putBeeper(); if (frontIsClear()) move(); if (frontIsClear()) move(); putBeeper(); // Moves Karel up and aligns to the next row function repositionToNextRow() if (facingEast()) if (leftIsClear()) turnLeft(); move(); turnLeft(); else if (rightIsClear()) turnRight(); move(); turnRight(); // Helper to turn right function turnRight() turnLeft(); turnLeft(); turnLeft(); Use code with caution. 4. Detailed Explanation of the Code main() Function
The Checkerboard v1 problem teaches:
CodeHS exercise 9.1.6 (v1) requires creating an 8x8 2D list and using nested loops with assignment statements to place pieces (1s) in the top three (rows 0-2) and bottom three (rows 5-7) rows. The solution involves initializing a grid of zeros, applying conditional logic to update specific elements, and printing the formatted grid. For a detailed breakdown of the solution, refer to the discussion on Reddit [Link: Reddit user thread https://www.reddit.com/r/codehs/comments/kt28qe/916_checkerboard_v1_answers_needed_what_am_i/].