try and make all the squares yellow:

http://binertia.com/lightswitch.html :)
Posted on 2004-09-02 03:39:07 by abc123
The game is called fiver if I am not wrong.

My friend did a mathematics on this game and won some prizes. There is a method to solve it, by the way. I just need to ask him :-D
Posted on 2004-09-02 07:02:54 by roticv
Ask him, tell us, victor...
Posted on 2004-09-02 07:51:31 by Dom
My solution: click the squares that are marked with X.
Posted on 2004-09-02 10:33:50 by Tomasz Grysztar
cool, privalov! :)
Posted on 2004-09-02 12:38:52 by lifewire
Well done indeed... :)
Posted on 2004-09-02 13:56:47 by Eóin
privalov, yes, well done, i'm impressed :) but do you think you could link that image instead of embedding it so others get a chance to try the puzzle before they see the solution

im curious as to how you figured it out? did you know the answer? or some method...
Posted on 2004-09-02 17:57:12 by abc123
I played with that kind of game too. The goal was a bit different : you had a figure and you have to turn off all the lights. I did a solver for that game it's very easy once you know the method.
What you can figure first is that pressing twice the same key does nothing (2^25 combinations).
If we except the first line the only way to light all the square is to press the square that is under a non lighted square (the only way to light that square), that for each line.
So the solution depends only on what you pressed on the first line. You need only to test 2^5 combinations.
Then you quickly get the solution in testing 00000, 00001, 00010.
Posted on 2004-09-04 09:04:47 by BJZ