"Lights Switched" toggles the cell selected and its immediate orthogonal neighbours.
"Lights On Diagonally" does exactly the same except that diagonal neighbours are toggled on or off, ie, if a neighbour is on it is turned off.

Select an "N x N" grid size to display that grid for examination.

Offer a lowest switching sequence for each grid (for the 3 x 3 it takes 5).

Brian, I didnīt look at Charlieīs solution, to try find them in my spare time. Iīm trying to copy the source code of each matrix, but Iīm not succeding. Itīs problem with my right click on the mouse or I actually canīt?

Posted by pcbouhid on 2009-07-16 14:36:59