Numble multiple of 3) A zero is allowed at each end and duplicate digits are allowed (except for having more than one zero at either end). The following is valid; 0,2,3,6,7,0 but not 0,0,2,3,6,7 or 2,3,6,7,0,0. 1,1,3,6,7 is ok too. Each tile is worth its digit's value in points. A blank could be placed anywhere and, unlike in Scrabble, did not count as a particular digit, so the same blank tile could, for example, be between 3 and 4 in a horizontal sequence and between 8 and 9 in a vertical one. (This is used to get the extra points from
Tile tracking player who can plan and calculate the best move while taking into consideration the other player's possible responses—winning a close game by blocking an opponent’s big play or setting up a high-scoring play the opponent cannot block. Scrabble champion John Holgate notes that tile-tracking is particularly important in tight "bobbing" finishes when the bag is empty, and that many games are lost through "just not knowing what tiles your opponent has on her rack. You simply cannot calculate possible permutations if you are unsure about which letters are relevant." Tracking can also tell a player if the bag is ‘vowel-heavy’