Teaching LinkedIn Zip #468: students sketch one checkpoint hop at a time on this 7×7 board. 12 checkpoints, 0 walls. Walk the 11 segments before drawing the full line.
Board spotlight: Checkpoints sit close together on the grid — short numbered hops still need full-cell coverage between them without revisiting squares. Wall count 0 on 7×7 shapes which corridors stay open between numbered cells.
Lesson hop 1: show why the path must pass through R5C2 before checkpoint 2. 10 cells link checkpoint 1 at R2C4 to checkpoint 2 at R5C2 with open corridors (no walls on this segment).
Lesson hop 2: show why the path must pass through R5C4 before checkpoint 3. Tight 3-cell hop — checkpoints 2 and 3 sit near each other; still visit every intervening cell exactly once.
Lesson hop 3: show why the path must pass through R3C2 before checkpoint 4. 5 cells link checkpoint 3 at R5C4 to checkpoint 4 at R3C2 with open corridors (no walls on this segment).
Lesson hop 4: show why the path must pass through R2C2 before checkpoint 5. Tight 2-cell hop — checkpoints 4 and 5 sit near each other; still visit every intervening cell exactly once.
Lesson hop 5: show why the path must pass through R3C4 before checkpoint 6. 4 cells link checkpoint 5 at R2C2 to checkpoint 6 at R3C4 with open corridors (no walls on this segment).
Lesson hop 6: show why the path must pass through R5C6 before checkpoint 7. 11 cells link checkpoint 6 at R3C4 to checkpoint 7 at R5C6 with open corridors (no walls on this segment).
Lesson hop 7: show why the path must pass through R6C6 before checkpoint 8. Tight 2-cell hop — checkpoints 7 and 8 sit near each other; still visit every intervening cell exactly once.
Lesson hop 8: show why the path must pass through R6C2 before checkpoint 9. 11 cells link checkpoint 8 at R6C6 to checkpoint 9 at R6C2 with open corridors (no walls on this segment).
Lesson hop 9: show why the path must pass through R6C4 before checkpoint 10. Tight 3-cell hop — checkpoints 9 and 10 sit near each other; still visit every intervening cell exactly once.
Lesson hop 10: show why the path must pass through R3C6 before checkpoint 11. 6 cells link checkpoint 10 at R6C4 to checkpoint 11 at R3C6 with open corridors (no walls on this segment).
Lesson hop 11: show why the path must pass through R2C6 before checkpoint 12. Tight 2-cell hop — checkpoints 11 and 12 sit near each other; still visit every intervening cell exactly once.
Recap: 12 checkpoints, 11 teachable hops, one continuous route. Replay using checkpoint-first planning.