Simply defined, “diopters” is the pluralized form of a measure of reflective power in an optical lens. It’s not a word in everyone’s mental lexicon, but if you play your tiles right, it can earn you 149 points on the world’s biggest Scrabble stage.

And that’s exactly what Ottawa mathematician Adam Logan did, as he placed the letters across two triple-word squares in his highest-scoring play of the World Scrabble Championship.

In two turns alone, Logan had added a whopping 252 points to his score — “infamies” had been his previous move for an impressive 103 points — to erase his opponent’s lead and complete a major comeback in the third game of the best-of-seven matchup of the World Scrabble Championship final in Accra, Ghana. Logan went on to win game three, and then, hours later, the ch

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