Brilliant!
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How to play
- Goal: make all 25 lamps glow at the same time.
- Tap a lamp to flip it plus the lamps directly above, below, left and right. Diagonal lamps do not change.
- A second tap on the same lamp cancels the first. The dotted blue rim remembers lamps with an odd number of taps.
- Par is the fewest taps possible. Every daily board has exactly one shortest solution, but any route that lights the whole board wins.