LinkedIn Zip #485 is a 7×7 Zip board with 20 numbered checkpoints and 0 walls. The Hamiltonian path visits all 49 cells once, hits checkpoints 1–20 in order, and ends on the final number. Segment plan: 1→2 (2 cells, R7C3→R7C2); 2→3 (2 cells, R7C2→R7C1); 3→4 (4 cells, R7C1→R5C2); 4→5 (2 cells, R5C2→R6C2); 5→6 (9 cells, R6C2→R1C1); 6→7 (2 cells, R1C1→R1C2); 7→8 (2 cells, R1C2→R1C3); 8→9 (3 cells, R1C3→R1C5); 9→10 (5 cells, R1C5→R2C2); 10→11 (2 cells, R2C2→R3C2); 11→12 (8 cells, R3C2→R7C5); 12→13 (6 cells, R7C5→R3C6); 13→14 (2 cells, R3C6→R2C6); 14→15 (2 cells, R2C6→R1C6); 15→16 (2 cells, R1C6→R1C7); 16→17 (6 cells, R1C7→R5C6); 17→18 (4 cells, R5C6→R7C7); 18→19 (2 cells, R7C7→R7C6); 19→20 (2 cells, R7C6→R6C6).
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.
Segment 1 (1→2): 2 cells from R7C3 to R7C2. Tight 2-cell hop — checkpoints 1 and 2 sit near each other; still visit every intervening cell exactly once.
Segment 2 (2→3): 2 cells from R7C2 to R7C1. Tight 2-cell hop — checkpoints 2 and 3 sit near each other; still visit every intervening cell exactly once.
Segment 3 (3→4): 4 cells from R7C1 to R5C2. 4 cells link checkpoint 3 at R7C1 to checkpoint 4 at R5C2 with open corridors (no walls on this segment).
Segment 4 (4→5): 2 cells from R5C2 to R6C2. Tight 2-cell hop — checkpoints 4 and 5 sit near each other; still visit every intervening cell exactly once.
Segment 5 (5→6): 9 cells from R6C2 to R1C1. 9 cells link checkpoint 5 at R6C2 to checkpoint 6 at R1C1 with open corridors (no walls on this segment).
Segment 6 (6→7): 2 cells from R1C1 to R1C2. Tight 2-cell hop — checkpoints 6 and 7 sit near each other; still visit every intervening cell exactly once.
Segment 7 (7→8): 2 cells from R1C2 to R1C3. Tight 2-cell hop — checkpoints 7 and 8 sit near each other; still visit every intervening cell exactly once.
Segment 8 (8→9): 3 cells from R1C3 to R1C5. Tight 3-cell hop — checkpoints 8 and 9 sit near each other; still visit every intervening cell exactly once.
Segment 9 (9→10): 5 cells from R1C5 to R2C2. 5 cells link checkpoint 9 at R1C5 to checkpoint 10 at R2C2 with open corridors (no walls on this segment).
Segment 10 (10→11): 2 cells from R2C2 to R3C2. Tight 2-cell hop — checkpoints 10 and 11 sit near each other; still visit every intervening cell exactly once.
Segment 11 (11→12): 8 cells from R3C2 to R7C5. 8 cells link checkpoint 11 at R3C2 to checkpoint 12 at R7C5 with open corridors (no walls on this segment).
Segment 12 (12→13): 6 cells from R7C5 to R3C6. 6 cells link checkpoint 12 at R7C5 to checkpoint 13 at R3C6 with open corridors (no walls on this segment).
Segment 13 (13→14): 2 cells from R3C6 to R2C6. Tight 2-cell hop — checkpoints 13 and 14 sit near each other; still visit every intervening cell exactly once.
Segment 14 (14→15): 2 cells from R2C6 to R1C6. Tight 2-cell hop — checkpoints 14 and 15 sit near each other; still visit every intervening cell exactly once.
Segment 15 (15→16): 2 cells from R1C6 to R1C7. Tight 2-cell hop — checkpoints 15 and 16 sit near each other; still visit every intervening cell exactly once.
Segment 16 (16→17): 6 cells from R1C7 to R5C6. 6 cells link checkpoint 16 at R1C7 to checkpoint 17 at R5C6 with open corridors (no walls on this segment).
Segment 17 (17→18): 4 cells from R5C6 to R7C7. 4 cells link checkpoint 17 at R5C6 to checkpoint 18 at R7C7 with open corridors (no walls on this segment).
Segment 18 (18→19): 2 cells from R7C7 to R7C6. Tight 2-cell hop — checkpoints 18 and 19 sit near each other; still visit every intervening cell exactly once.
Segment 19 (19→20): 2 cells from R7C6 to R6C6. Tight 2-cell hop — checkpoints 19 and 20 sit near each other; still visit every intervening cell exactly once.
Complete path: 49 cells, checkpoints in order, ending on 20. Pattern: checkpoint-cluster board — Checkpoints sit close together on the grid — short numbered hops still need full-cell coverage between them without revisiting squares.