LinkedIn Zip #439 Answer & Analysis

The solved-board data shows a very tight opening from 1 at R4C6 to 2 at R2C5 and then to 3 at R3C7. The forced run goes through the upper-right corridor: it climbs from R4C6 to R3C6, R2C6, R2C5, R1C5, then across the top edge to R1C8 before dropping back through R2C8, R2C7, R3C7, R3C8, R4C8, and R4C7. That shape is valuable because it preserves the rest of the board for later.

The numbered checkpoints 4, 5, and 6 force the path to stay flexible through the lower-right and central zones. The key idea is not to rush toward the nearest open cell; instead, keep a single corridor alive so the route can later pass through R7C7, then R5C6, and then R6C2 in order. If that middle area gets split into dead ends, the puzzle cannot be finished.

The solved data also shows a clean left-column sequence that helps reconnect the board after the opening: R5C1, R4C1, R3C1, R2C1, R1C1, then across to R1C2 and down to R2C2. That is the kind of shape you want because it uses the edge efficiently and creates a safe lane for the later checkpoints.

After the left-side climb, the board data shows the path passing through 7 at R2C2 and then into the middle-left corridor toward 8 at R5C3. The visible route runs R2C2, R3C2, R4C2, R5C2, and R5C3, which is a strong clue that the center must stay open until this section is complete. This is also where many players accidentally create a dead end, so keep the movement smooth and adjacent.

The final visible segment from the solved-board data is a strong center-line finish: R5C4, R4C4, R4C5, R3C5, R3C4, R2C4, R1C4, R1C3, R2C3, R3C3, and finally R4C3 for 10. This is exactly the kind of finish you expect in a Zip solution: one continuous path, every move orthogonal, every number in order, and no cell used twice.