Input:

The checkerboard has 8×8 squares, but you might accidentally loop 0 to 7 (correct) or 1 to 8 (incorrect). Fix: Always start your loop at 0 and use < ROWS and < COLUMNS .

A loop that repeats the setup and move functions until the top of the world is reached. 3. The 9.1.6 Checkerboard V1 Code Solution

This code creates the simple, solid-row board described in the problem.

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

# Constants for the board size and square size NUM_ROWS = 8 NUM_COLS = 8 SQUARE_SIZE = 50

Creating a 9.1.6 Checkerboard V1 program in CodeHS requires a solid understanding of and 2D arrays (or grids). This exercise is a classic milestone in Java or JavaScript curriculum because it forces you to think about how coordinates interact.

If your actual CodeHS prompt differs, tell me the exact statement and I will adapt this write-up.

. This specific version focuses on the foundational step of creating a 2D structure where values represent different game states: for a checker piece and for an empty square. The Assignment Objective The goal is to create an

This article provides a comprehensive guide to solving the problem, aimed at students working through Karel the Dog's fundamental coding concepts.

Here is the complete JavaScript solution using the CodeHS graphics library. javascript

The ( row ) tracks the vertical progression. It starts at row 0 and moves down to row 7.

Ensure xPos uses the column variable ( c ) and yPos uses the row variable ( r ). Reversing them will flip your grid mapping logic.

This version explicitly creates each element in the 2D list.

This document analyzes the problem titled "9.1.6 checkerboard v1" from CodeHS (assumed exercise naming), reconstructs likely requirements, explains correct algorithmic approaches, provides a rigorous step‑by‑step solution, proves correctness, highlights edge cases, and offers an annotated reference implementation in Python (readable pseudocode for educators/students). Assumptions about the exact original prompt are made explicit where the source problem text is unavailable.