916 Checkerboard V1 Codehs Fixed Jun 2026
Debugging CodeHS 9.1.6 Checkerboard v1: The Complete Fix Guide
To build a grid, you must use a loop inside another loop, known as a .
Students often forget to handle the very last row or the very last avenue. Karel might stop one step short, leaving an incomplete checkerboard, or try to move forward into a wall, causing a fatal crash. 2. The Row Transition Parity Flop 916 checkerboard v1 codehs fixed
The most common "non-fixed" issues students encounter:
The objective of Exercise 9.1.6 is to use nested loops to draw a standard checkerboard pattern on the screen. The program must alternate colors—typically red and black or black and white—across rows and columns using graphical square objects. Key Requirements Debugging CodeHS 9
) to ensure Karel finishes the very last row even if there is no "left" to move into.
grid where the top three and bottom three rows are filled with 1s, and the middle two rows are filled with 0s. Key Requirements ) to ensure Karel finishes the
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?
var board = []; for (var i = 0; i < 8; i++) board[i] = []; for (var j = 0; j < 8; j++) if ((i + j) % 2 === 0) board[i][j] = "black"; else board[i][j] = "white";
Before we jump to the "fixed" code, let’s break down the assignment’s requirements:
function start() // Define the size of your checkerboard grid var ROWS = 8; var COLS = 8; // Outer loop controls the rows for (var r = 0; r < ROWS; r++) // Inner loop controls the columns for (var c = 0; c < COLS; c++) // Check if the sum of row and column is even if ((r + c) % 2 === 0) drawSquare(r, c, Color.black); else drawSquare(r, c, Color.white); // Helper function to handle the drawing mathematics function drawSquare(row, col, color) var sideLength = 40; // Adjust based on your specific CodeHS canvas size var x = col * sideLength; var y = row * sideLength; var square = new Rectangle(sideLength, sideLength); square.setPosition(x, y); square.setColor(color); add(square); Use code with caution. CodeHS 9.1.6 Checkerboard v1: Java (2D Array) Fix