916 Checkerboard V1 Codehs Fixed 〈Browser〉

916 Checkerboard v1 Codehs Fixed

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:

Problem Overview

You are tasked with creating a checkerboard pattern using a grid of squares. The board should have 8 rows and 8 columns of alternating black and red squares. The top-left square should be red. 916 checkerboard v1 codehs fixed

This is "v1" of the problem, meaning it likely expects a straightforward approach using nested loops and conditionals, without more advanced optimizations. 916 Checkerboard v1 Codehs Fixed The 916 Checkerboard

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D. Movement Logic

Inside the inner loop, we must move the turtle to the location of the next square. each square = 50×50.

• t.goto(current_x + (j + 1) * SIZE, current_y - i * SIZE):
  • We calculate $x$ based on which column (j) we are in.
  • We calculate $y$ based on which row (i) we are in.

Report: 916 Checkerboard v1 (Fixed)

Common errors & fixes:

1. Not alternating correctly
   Use (row + col) % 2 === 0 to determine color.

2. Square size / positioning wrong
   If canvas is 400×400, each square = 50×50.

3. Off-by-one in loops
   Ensure you loop rows 0–7 and columns 0–7.

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