DWG-108.4.09
Lights #9 · Expert
Your progress on this sheet is saved in this browser. Solve it to get a Next puzzle button.
About this puzzle
29 of the 64 lamps on this 8×8 board are lit. Exactly one set of lamps switches them all off, and it takes 25 presses.
Where to start
If you chase the lights down row by row, the solution presses 2 lamps in the top row.
On 8×8, the same method works; be patient with the second chase and count your presses.