I solve LinkedIn Zip #486 checkpoint by checkpoint on a 7×7 grid. 9 numbers to hit in sequence, 8 walls to respect. My route breaks into 8 hops: 1→2 (5 cells), 2→3 (11 cells), 3→4 (7 cells), 4→5 (5 cells), 5→6 (5 cells), 6→7 (5 cells), 7→8 (11 cells), 8→9 (7 cells).
Before the first stroke I mark walls and the next checkpoint — on this board that means Many blocked edges narrow your options early — map wall bottlenecks before tracing toward the next numbered checkpoint.
I draw hop 1 next — checkpoint 2 at R3C1 after 5 cells from R5C3. Open corridor — no walls on this hop.
I draw hop 2 next — checkpoint 3 at R3C7 after 11 cells from R3C1. Open corridor — no walls on this hop.
I draw hop 3 next — checkpoint 4 at R2C2 after 7 cells from R3C7. Open corridor — no walls on this hop.
I draw hop 4 next — checkpoint 5 at R3C5 after 5 cells from R2C2. Open corridor — no walls on this hop.
I draw hop 5 next — checkpoint 6 at R5C7 after 5 cells from R3C5. Open corridor — no walls on this hop.
I draw hop 6 next — checkpoint 7 at R6C6 after 5 cells from R5C7. Open corridor — no walls on this hop.
I draw hop 7 next — checkpoint 8 at R5C1 after 11 cells from R6C6. Open corridor — no walls on this hop.
I draw hop 8 next — checkpoint 9 at R4C4 after 7 cells from R5C1. Open corridor — no walls on this hop.
Finished — every cell filled, no revisits, walls respected. Many blocked edges narrow your options early — map wall bottlenecks before tracing toward the next numbered checkpoint.