When do bonus squares increase the score of a play in SCRABBLE?
The bonus is only scored for the player who originally covers the bonus square, and only for the one turn. Subsequent turns that use a letter already covering a bonus square don’t score the bonus points. For example, suppose FAZE is placed with the Z on the Double Word Score square and scores a total of 32 pt. If someone later adds an S to form FAZES, the Double Word Score is NOT counted.