LinkedIn Zip #456 Answer & Analysis

Start at 1 in the center of the board at R4C3. The route must climb straight upward through R3C3 and R2C3 to reach 2 at R1C3, then step right to 3 at R1C4. From there, keep extending along the top row to R1C6 so the upper edge stays open.

From the top-right corner, the cleanest continuation is to move down the right edge. That carries the path through the entire right side to the bottom row, where the route turns left and passes through 4 at R6C3 before reaching the bottom-left corner.

From the lower-left corner, move upward through column 1. That lets the path hit 5 at R3C1 and 6 at R2C1 before reaching R1C1. Then step right to 7 at R1C2, which keeps the route connected without blocking the middle of the board.

After 7, the path drops down column 2. This creates room to pass 8 at R4C2, then continue into the lower-middle area and reach 9 at R5C3. The route then moves right across the fifth row so the upper-right interior remains available for the last numbered cells.

The final stretch rises through the right-middle cells to hit 10 at R3C5 and 11 at R2C5. From there, the path turns inward through R2C4 and R3C4 before ending at 12 in R4C4. That last bend is what completes the full-grid path without revisiting any cell.