Turn out all the bulbs.
The aim of this tough thinking game is to turn out all the lights in a 5×5 grid . When the game begins about half of the bulbs are lit. In order to turn a bulb off you just have to click on it. The problem is that by clicking on a bulb you reverse the state of all adjacent pieces – from On to Off, or Off to On. It is nevertheless possible, by deduction, to turn all the lights off. The soft will count the number of goes and the time you take. It will also propose the solution for impatient players.