Highest scoring single play in Scrabble

Under the North American rules, governed by the Official Scrabble Players Dictionary (OSPD), the highest-scoring single play was the word QUIXOTRY, which earned carpenter Michael Cresta (USA) 365 points. The word CAZIQUES, feasible under the Official Scrabble Words International (or SOWPODS) rules, earned Karl Khoshnaw (Germany) 392 points. In America, Canada, Israel and Thailand, the game of Scrabble is governed by the American Tournament Word List (TWL), which is based on a modified version of the Official Scrabble Players Dictionary (OSPD). All other English-speaking countries rely on the Official Scrabble Words International (OSWI) book, which contains words from both the OSPD and the Official Scrabble Words (OSW) book; this is also known as SOWPODS, an abbreviation of OSPD and SOW.