Tile tracking or 'consonant-heavy', how many S's or blanks are unseen, if an opponent is likely to have a bingo on their rack, or which tiles to play or conserve. For example, if Alice has the option of playing J(I)NN or J(I)LL, and four N's and zero L's remain unseen, then assuming both plays are otherwise equal (in terms of score, openings for the opponent), J(I)NN is likely the better play. Letter frequency lists for both Scrabble and Words with Friends are easily accessible (some versions of Scrabble have the tile distribution directly on the board) and, unlike word lists, using them
Scrabble letter distributions not allowed. Official rules treat the "Q" tile as just one letter, but usually Catalan players use the "Q" tile like the "QU" digraph and all Catalan Scrabble Clubs use this "de facto" rule. "K", "W", and "Y" are absent because they are only used in loanwords or, in the case of "Y", the digraph "NY". Blanks cannot be used to represent "K", "W", or "Y". There is a Catalan Scrabble clone which uses the same 21x21 board as Super Scrabble. Croatian-language Scrabble sets use the following 103 tiles: "Q", "W", "X" and "Y" are not included, as Croatian does