Scrabble variants require scientific notation, depending on the board. Points are calculated automatically and displayed next to definitions of words as they are placed. Anadrome has a tile-earning mechanic and board editor, allowing users to create publicly available boards for Scrabble, Words with Friends, and their own custom designs, making it a superset of crossword-style games. On the game show "Scrabble Showdown", two teams play various games in order to win prizes including a vacation to anywhere in the world. Gosum is similar to Numble. Users place sequences of numbers and equations, using the four main arithmetic operators (addition, subtraction, division, multiplication)
Scrabble made in 1989 did not affect game play. The major changes in 1999 were as follows: In the notation system common in tournament play, columns are labeled with the letters "A-O" and rows with the numbers "1-15". (On "Scrabble" boards manufactured by Mattel as well as on the Internet Scrabble Club, rows are lettered while columns are numbered instead.) A play is usually identified in the format "xy WORD score" or "WORD xy score", where "x" denotes the column or row on which the play's main word extends, "y" denotes the second coordinate of the main word's first letter, and