Expert boards
12×12 · 35 to 50 bulbs · fifteen minutes or more
The 12×12 board is the long game. Best on a tablet or desktop where tiles stay large; expect a quarter of an hour and a satisfying click at the end.
What to expect
- A 12×12 grid: 144 tiles, one power source, 35 to 50 bulbs.
- Par (the fewest possible quarter turns) is usually 110 to 150. Match it for a Perfect badge.
- Every board has a link. Send yours and your friend plays the exact same scramble.
Tips for expert boards
- Solve the border completely first; it propagates constraints deep into the grid.
- Hints highlight one wrong tile next to the powered region. They are counted, not forbidden.
- Turn on Wrap only when the plain board feels easy: wrapped edges remove every border clue.
Prefer a shared board? Try today's daily, the same puzzle for everyone with a leaderboard.