Hard boards
9×9 · 20 to 30 bulbs · five to ten minutes
Hard boards reward method over speed. The circuit branches several times and dead ends are everywhere, so counting openings matters more than intuition.
What to expect
- A 9×9 grid: 81 tiles, one power source, 20 to 30 bulbs.
- Par (the fewest possible quarter turns) is usually 60 to 85. Match it for a Perfect badge.
- Every board has a link. Send yours and your friend plays the exact same scramble.
Tips for hard boards
- Count the openings on each tile and on its neighbours before turning anything.
- T-junctions have one closed side; find which neighbour cannot connect and the T is solved.
- Use Undo freely. Moves are cheap, time is what counts.
Prefer a shared board? Try today's daily, the same puzzle for everyone with a leaderboard.