9.1.6 Checkerboard V1 Codehs Jun 2026

Using getWidth() / NUM_COLS ensures that the checkerboard perfectly stretches to fit the screen width, regardless of the device resolution. 2. The Logic Behind the Color Alternation The core mathematical trick lies in this line: javascript if ((r + c) % 2 === 0) Use code with caution.

If your squares are bleeding into each other or leaving white gaps, double-check your coordinate math. x2 must always be x1 + SQUARE_SIZE .

Ensures your code is responsive. If CodeHS changes the canvas width, your checkerboard automatically scales to fit perfectly. 9.1.6 checkerboard v1 codehs

Ensure you are using the correct color constants (e.g., Color.BLACK vs Color.black ) depending on your specific CodeHS library version.

A checkerboard pattern requires that adjacent squares never share the same color. Using getWidth() / NUM_COLS ensures that the checkerboard

Use the modulus operator (%) to create the "every other" effect. A reliable trick is checking if (i + j) % 2 == 0 .

grid populated with zeros. This sets up the structure of the board. board = [] for i in range(8): board.append([0] * 8) Use code with caution. Step 2: Implement Nested Loops You need to visit every cell in the grid. A nested loop is the best way to do this. If your squares are bleeding into each other

The core concepts remain identical: nested loops for iterating over the 8x8 grid, a conditional to target specific rows, and the modulo operator to create the alternating pattern.

return win

The output should be an , but the requirement for this version is specific: the grid needs to have 1's on the top three rows and the bottom three rows , arranged in an alternating pattern. The middle two rows remain completely blank (filled with 0's). The final board should visually resemble the typical starting position of a checkers board.

The objective is to create a grid of alternating colored squares (usually black and white) resembling a classic checkerboard.