Blokus is a combination of Tetris, chess and Chinese Checkers. It is incredibly easy to learn, and as tactically challenging as chess (I am an intermediate chess player). With four players, it is as riling as Monopoly ("why are you after ME all the time????"). The two player version is more calculable, as the pieces are fewer. I highly recommend both the 4 and 2 player versions of Brokus Strategy board game.