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The guy read a suggestion in Math Games with Bad Drawings to play Scrabble with a rule allowing Pac-Man style wraparound. This sounded like a good idea, but it puts all of the triple word score squares right next to each other, so it’s pretty much a race to just get to those and get a 9x word score. (27x word scores are also possible.)
It did almost make me want to try 3D Scrabble, though.