Publisher statement The L-game is a 2-player strategic game played on a 4x4 grid. It was originally devised by Edward de Bono and appeared in the book, "The Five-Day Course in Thinking." in the game, each player has one 'L' which covers four squares. The two L's are labelled differently to avoid confusion. There are also two neutral 'boxes' each the size of a single square on the grid. ... The object of the game is simply to position one's L and the neutral boxes to pin the other player's L. ... The computer version of the L Game was written by Bill Gardner.