It's not an online game...it is an actual board game that you would need to purchase. The board is a bit like a chess board, and the pieces each player has a mirror on one side. The object of the game is to kill the opposite players king. You do that by firing a small LED light on the board and if the light shines on the opposite players King, then you "kill" him and win the game.
It looks fun to me because you move your pieces around the board and try and position your mirrors in suce a fashion that when the light beam is fired from one side of the board, it will reflect off of all of your strategically placed pieces and eventually get to the other King. It looks a bit like building a mini maze and would require a fair amount of logic to think ahead how the beam may bounce off of a dozen different mirrors to get to it destination.
Mark
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"A candle loses nothing by lighting another candle"