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L-Game (1968)

The L game is a simple abstract strategy board game invented by Edward de Bono and introduced in his book “The Five-Day Course in Thinking” (1967). It is a two-player game played on a board of 4×4 squares, with each player having a 3×2 L-shaped tetromino and two 1×1 neutral pieces. The game is won by leaving the opponent unable to move their L piece to a new position.The L game is popular and significant because it is a simple and engaging abstract strategy game that requires minimal equipment and can be played by people of all ages and backgrounds. The game is small enough to be completely solvable, with 2296 different possible valid ways the pieces can be arranged. The L game has been studied extensively, and it is believed that neither player will ever win or lose in a game with two perfect players.

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