916 Checkerboard V1 Codehs Fixed Link
Let’s break down exactly how the code works:
: If you are writing a custom print method, ensure your System.out.println(); sits outside the inner column loop but inside the outer row loop. Placing it incorrectly will cause your grid to print as a single vertical line.
To build a flawless checkerboard pattern, you must calculate the value of a cell based on its unique mathematical coordinates: the and the column index .
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
According to the official instructions for 9.1.6 Checkerboard, v1 , the grid is structured with the top three rows and the bottom three rows filled with an alternating pattern of 1 s and 0 s. The middle two rows are left completely blank, filled entirely with 0 s. The final board should have a structure that looks like this:
public void run() for (int row = 0; row < ROWS; row++) for (int col = 0; col < COLUMNS; col++) int x = col * SQUARE_SIZE; int y = row * SQUARE_SIZE;
In the 9.1.6 exercise, the goal is to write a Python function that creates or manipulates a 2D list (a list of lists) so that it resembles a checkerboard. The board typically consists of alternating 1s and 0s, mimicking the black and white squares of a standard checkerboard. Let’s break down exactly how the code works:
The most common mistake in "v1" is only checking if the column is even or odd. If you do that, every row will look identical, resulting in vertical stripes rather than a checkerboard. Use the sum of the row and column indices. If (row + col) is even , color it Red. If (row + col) is odd , color it Black. The Corrected Code (JavaScript/Karel Style)
Here is the completed, "fixed" Python code that correctly initializes the 2D list and applies the correct mathematical pattern:
If you are still hitting roadblocks with your CodeHS compiler, let me know: This is "v1" of the problem, meaning it
Most errors in this assignment stem from two specific logical hurdles: Row transitions and grid parity. 1. The "Fencepost" Error
This creates the alternating pattern automatically.
Often, the final row isn't filled if the while(leftIsClear()) condition fails too early. The fillRow() call after the main while loop fixes this.