9.1.7 Checkerboard V2 Codehs 2021

At first glance, this problem seems simple: draw a checkerboard. But the "V2" designation introduces specific logic constraints that often trip up students. This article will break down the problem, explain the underlying logic of nested loops and modulus operators, provide step-by-step code solutions in both Java and JavaScript, and offer debugging tips to help you pass the autograder on your first attempt.

This skill directly translates to drawing game boards (chess, checkers, tic-tac-toe), data visualizations, and tile-based maps.

The goal is typically to draw an 8x8 checkerboard with alternating black and red squares (or another color pair).

GRect square = new GRect(x, y, SIZE, SIZE); if (isBlack) square.setFilled(true); square.setFillColor(Color.BLACK); else square.setFilled(true); square.setFillColor(Color.RED); // or Color.WHITE 9.1.7 Checkerboard V2 Codehs

| Test Case | Expected Behavior | |-----------|------------------| | 1x1 board | Single square | | 1x5 board | Horizontal alternating pattern | | 5x1 board | Vertical alternating pattern | | 2x2 board | Top-left = dark, top-right = light, bottom-left = light, bottom-right = dark | | 10x10 board | Perfect checkerboard, no line breaks inside |

To create a checkerboard, a cell should be a 1 if the sum of its row and column indices is even (or odd, depending on your starting preference). : Assign 1 . Odd sum : Assign 0 . Step-by-Step Implementation

Once you pass 9.1.7, you’re ready for even cooler graphics exercises — like drawing a chessboard with pieces, or an animated checker game. At first glance, this problem seems simple: draw

Call the provided print_board function to display your final 2D list. Solution Code

Use the graphics function to draw the rectangle at with the determined color. Example Solution Snippet

At its heart, the "9.1.7 Checkerboard, v2" task is about constructing a two-dimensional (2D) list—a grid of rows and columns—where the values alternate to form a checkerboard pattern. The challenge typically involves two key parts: This skill directly translates to drawing game boards

for row in 0..N-1: for col in 0..N-1: x = col * squareSize y = row * squareSize if (row + col) % 2 == 0: color = "black" else: color = "white" rect = Rectangle(squareSize, squareSize) rect.setPosition(x, y) rect.setFillColor(color) rect.setStrokeColor(color) // optional add(rect)

The core task for is to create a function that prints a checkerboard pattern. The exact language and requirement can vary, but the Brainly post for this exact problem states:

If (row + column) % 2 == 0 → Color A. If (row + column) % 2 == 1 → Color B.