Whats the word that gives you the most points in scrabble?

You want to get a 50-point bonus for laying down all your tiles so apart from the opening move, you are looking to add 7 letters to make an 8-letter word, and ideally involving 2 high-scoring letters (Q Z X and J) one of them placed on a double-letter square, getting two triple word scores and (ideally) some extra words being made in addition to the main word you lay down.



eg your opponent kindly (foolishly) sends a word up to the top of the board by placing a word starting with T in the 6th square in the top row, reading down from there. The rest of the top row is empty.You jold QUIXOIC and lay down QUIXOTIC from the top left hand corner, reading across.



That scores 9 x (10 1 1 16 1 1 1 3 = 34) plus 50 more bonus points = 356 points.



QUIZZING (the second Z to be a blank) in the same position with a kindly-placed I in column 6 would score 374.



Any advance on 374, anyone?



(It is more than I normally score in a whole game!)
I believe that