One Line Puzzle Level 51 — Eight islands

Begin at row 4, column 6 and finish at the diamond at row 4, column 5. The 48 active squares span 8 columns and 7 rows on an 8 × 8 canvas. The occupied area has 8 missing squares, including row 3, column 2 and row 3, column 7. The circle offers 3 legal forward openings; cover both sides of each connection before closing it.

Canvas: 8 × 8
Active squares: 48
Verified route: 47 moves
Campaign band (estimate): Hard
Round: 2 of 7

LEVEL 51 / 210

Eight islands

1 / 48squares filled

StartEnd8 × 8 canvas

Start at the circle. Fill every square, then finish at the diamond.

Level

Drag from the circle through every white square, then reach the diamond. Trace backward to undo, or tap neighboring squares. Arrow keys also work. Backspace undoes.

3 hints per level. Rechecking the same route position is free. Undo, Restart and refresh do not refill hints. General stuck reminders are free.

A little nudge

This wider board has several gaps. Think about the order of the areas before drawing between them.

A closer look at this board

The circle has 3 legal forward openings. There are 8 inactive squares inside the occupied rectangle; plan how to connect the areas around them. Filling an area too early can leave another area disconnected. A full path must cover every active square before the diamond.

Show a verified opening tip

One verified opening moves from the circle at row 4, column 6 to row 4, column 7. Keep the diamond at row 4, column 5 for the final move. This wider board has several gaps. Think about the order of the areas before drawing between them.

One Line Puzzle level 51 opening diagram: 48 active squares, circle at row 4, column 6, diamond at row 4, column 5 — Opening diagram · Level 51. This shows the board before drawing, not a completed solution.

Controls and recovery

Drag or tap neighboring squares; arrow keys also work. Retrace the immediately preceding square to undo, or press Backspace. Restart resets only this board's current route. No automatic warning appears while you can advance; a stationary stuck head gets a general nudge after about three seconds. Manual Hint provides up to 3 next-square hints per level. Rechecking a previously hinted route position is free; When device storage is available, Undo, Restart and refresh do not refill the allowance. If saving is blocked, used hints last only for this visit. General stuck reminders are free.

Questions about these puzzles

How many moves does this board need?

The verified route covers 48 distinct active squares in 47 forward moves. Backtracking changes your current route, and retries are unlimited. Other complete routes may also work.

Why can I not enter the diamond yet?

The diamond is the finish square. Every other active square must be covered before the final step into it. Reaching it early is rejected without changing the current route.