English-language Scrabble at club level in the UK. Tournaments follow a similar structure to American ones, usually at least 6 games but weekend tournaments where players play 12 to 16 games are not uncommon. The official Scrabble association the Association of British Scrabble players sanctions official tournaments with official ratings, ratings range from about 200 to about 60. The official dictionary is called SOWPODS. In contrast to American tournaments, players do not lose a move if they challenge a valid word, which in general means more words are challenged. There are only Scrabble competitions for primary and secondary school students in Hong
Scrabble variants or triplets of numbers that sum up to less than, or exactly 15, respectively. The placement of the pairs or triplets is similar to Scrabble. Triolet means "triplet" in French. Yushino uses number sequences where every number is the last digit of the sum of the previous two. For two number sequences it requires that the numbers are adjacent. Mixmath, a game developed by Wrebbit, also involves placing correct mathematical equations on a board with bonus squares similar to a scrabble board. Scrabble Upwords (originally just named UpWords) is played with 100 letter tiles on a special 10×10 board with