L game

L game board and starting setup, with neutral pieces shown as black discs

The L game is a simple abstract strategy board game invented by Edward de Bono. It was presented in his book The Five-Day Course in Thinking (1967).


The L game is a two-player game played on a board of 4×4 squares. Each player has a 3×2 L-shaped piece, and there are two 1×1 neutral pieces.


On each turn, a player must first move their L piece, and then may optionally move one of the neutral pieces. The game is won by leaving the opponent unable to move their L piece to a new position.

Pieces may not overlap or cover other pieces. On moving the L piece, it is picked up and then placed in empty squares anywhere on the board. It may be rotated or even flipped over in doing so; the only rule is that it must end in a different position from the position it started—thus covering at least one square it did not previously cover. To move a neutral piece, a player simply picks it up then places it in an empty square anywhere on the board.

Other Languages
العربية: إل (لعبة)
Deutsch: L-Spiel
español: Juego L
Esperanto: Ludo L
فارسی: بازی ال
français: L (jeu)
italiano: L game
occitan: L (jòc)
português: Jogo do L
русский: L-игра
українська: L-гра
中文: L棋