there's that awesome game: Gemini Rue (http://wadjeteyegames.com/gemini-rue.html), and it contains that easy puzzle. But I'm lazy, stupid, and bored, so I git init...
there are 10 vents vents are connected as follows
1 - 2 - 3
| / | |
4 5 - 6
| | / |
7 - 8 9
|
10
initially all vents are off.
toggling power on vent toggles power on each connected vent.
solution should have a power line between vent 10 and 3,
but only five vents should be on at maximum
it just tries random moves.
funny enough, it was sufficient! try to beat THAT:
~/src/rue> script/random_solver.rb
when you lose patience press control+C
found solution in 4 moves (try #1)
^Csolution found:
8 0 2 4