Scrabble is a wor game in which two to four players score points by forming words from individual lettered tiles on a game board marked with a 15-by-15 grid. The words are formed across and down in crossword fashion and must appear in a standard dictionary. Official reference works (e.g. The Official Scrabble Players Dictionary, now in its 4th edition) provide a list of permissible words, many of which are rarely found in standard English writing.