Scrabble variants the winner. In others, a calculation based on word length is used to determine the winner. Some variants allow for the exchange of unwanted tiles. Local variants include Take One or Take Four; the banning of 2 letter words; having a dictionary on hand for any players to use (but since it is a game of speed, this doesn't get used much); a bonus of 50 points for building the word "chicken", a bonus for longest word (number of letters in word, not tile values; and only if a single player has longest word), etc. Team Speed Scrabble is when
Tile tracking using AI or Artificial Intelligence. While the practice of tile-tracking is considered an acceptable part of Scrabble and sanctioned by NSA and NASPA rules, there is much colloquial evidence to suggest that tile-tracking as both a legitimate technique and a strategic tool is not widely known outside of the Scrabble community. The similarities to the technique to 'card counting' is credited as contributing to some of the confusion among novice players. Zynga's Words with Friends online game includes tile-tracking as a paid feature, known as 'Peeks'. This received some criticism as being a form of "cheating" that the Zynga both