crabble, board-and-tile game in which two to four players compete in forming words with lettered tiles on a 225-square board; words spelled out by letters on the tiles interlock like words in a crossword puzzle.
Players draw seven tiles from a pool at the start and replenish their supply after each turn. Tiles in the pool and those of other players are kept secret so that a player can see only those tiles on the board and his own. A player may forfeit his turn and exchange any or all of his tiles for those in the pool. There are 100 letter tiles, each imprinted with a point value for different letters, approximately corresponding to the frequency of occurrence of the letter in English words. Words are scored by adding up the point values of their letters, multiplied by any of 61 premium squares that may be covered, such as double letter, triple letter, double word, and triple word.
Scoring as the game advances is possible both horizontally and vertically, with higher scores registered by forming two or more interlocking words at the same time. At the end of the game, when one player has no tiles or the board is deadlocked, the player who has scored the greatest number of points is the winner. Values of unused letters left to players are totalled and deducted from their scores.