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For any word in a dictionary that is formed by a non-empty prefix x and a suffix y, a GADDAG contains a direct, deterministic path for any string REV(x)+y, where + is a concatenation operator. For example, for the word "explain," a GADDAG will contain direct paths to the strings e+xplain xe+plain pxe+lain lpxe+ain alpxe+in ialpxe+n nialpxe
Although OSPD bears the name Official Scrabble Players Dictionary, no country’s competitive organization lists the OSPD as its official dictionary; the NASPA Word List is the official word list for tournament Scrabble in the United States, Canada, Thailand and Israel. [2] Merriam-Webster markets the OSPD as ideal for school and family use.
Unlike the Official Scrabble Players Dictionary, NWL is a list and does not include definitions. It contains words not included in OSPD because they are considered offensive, [3] and a number of other additional words (mostly registered trademarks). Print versions of NWL can be procured from the NASPA website by NASPA members only.
Collins Scrabble Words (CSW, formerly SOWPODS) is the word list used in English-language tournament Scrabble in most countries except the US, Thailand and Canada, [1] although Scrabble tournaments in the US and Canada are also organized with divisions that use Collins Scrabble Words as their lexicon, some under the auspices of organizations such as the Collins Coalition.
The word source currently in use for international play, known as Collins Scrabble Words or CSW (formerly Official Scrabble Words or OSW) is not derived from a single dictionary, but combines three components: Collins (7th edition, 2005), Chambers (1998 edition) and TWL, the current Northern American wordlist.
Scrabble is a word game in which two to four players score points by placing tiles, each bearing a single letter, onto a game board divided into a 15×15 grid of squares. The tiles must form words that, in crossword fashion, read left to right in rows or downward in columns and are included in a standard dictionary or lexicon.
The nature of these changes shifts the emphasis of the game from playing short words to playing words of any length. For example, QUA*IST, could be the word QUARTERFINALIST. Good players must find 7-tile bonus plays a majority of the time, and the short odd words that are a staple in Scrabble are of little use in WildWords. [14] [15]
The benefits of tracking and counting tiles are widely known among competitive Scrabble players and tile tracking is considered a standard part of tournament play. [4] By tracking played tiles, players can learn what tiles remain unseen (either in the bag or on their opponent's rack) and use that information to make strategic decisions about what tiles to hold, which squares to block, and ...