Checkerboard Karel Answer Verified: 645

A verified approach focuses on making the code "world-independent" by using loops instead of fixed numbers. WordPress.com Row Filling

If you want a for Karel (fills every other cell with beepers, regardless of world size), here’s a typical answer (in Python‑style Karel or Java Karel): 645 checkerboard karel answer verified

But this still has edge case bugs. Let me give you the solution that works for all worlds (including 1xN and Nx1). A verified approach focuses on making the code

// Fills one row in a checkerboard pattern private void fillRow() putBeeper(); while (frontIsClear()) move(); if (frontIsClear()) move(); putBeeper(); regardless of world size)