Scoring

Each word formed in the play is scored this way:

• First, any tile played from the player's rack onto a previously vacant cell that is a "double letter" or "triple letter" premium cell has its point value doubled or tripled as indicated.
• To this is added the normal point value of every other letter in the word (whether newly played or existing).
• Then, if any newly-played tile was placed on a "double word" premium cell, the total is doubled. Likewise if any newly-placed tile was on a "triple word" premium cell, the total is tripled. It is not possible for double word and triple word cells to be used in the same word, since there are no such cells in the same row or column of the board.
• If two newly-placed tiles in the word are played on double-word cells, the total is doubled, and then redoubled, scoring four times the letter total. Likewise, a word played with two new tiles on triple-word cells is tripled and then retripled for nine times the letter score.
• In the unlikely (but possible) event that a 15-letter word is formed using new tiles on three triple-word cells (this requires using at least eight previously placed letters on other cells), the letter score is multiplied by twenty-seven.
• Finally, if a player uses all seven of the tiles in his rack in a single play, a bonus of 50 points is added to the score of that play. This is called a "bingo" in Canada and the United States, and a "bonus" elsewhere.