Super Scrabble corners of the board. Other than the differences in the board and the number of tiles, gameplay is similar to "Scrabble". Each player has seven tiles in their rack as normal, scoring is the same, and the same word lists are used. However, the differences are enough to upset normal "Scrabble" strategies. For example, the fifty points earned from a bingo (using all seven tiles) is not nearly as significant when compared to the high final scores. For a two-player game, scores over eight hundred points are not uncommon. Tournament-level "Scrabble" games are usually limited to two players. Many tournament
Scrabble generally excluded from the OSPD4 but allowed in club and tournament play. Proper nouns and other exceptions to the usual rules are allowed in some limited contexts in the spin-off game "Scrabble Trickster". Names of recognized computer programs are permitted as an acceptable proper noun (For example, WinZIP). There are two popular competition word lists used in various parts of the world: TWL and SOWPODS (also called "Collins" or "CSW"). The memorization of two-letter words is considered an essential skill in this game. The North American 2006 "Official Tournament and Club Word List, Second Edition" (OWL2) went into official use