Like most computerized spelling checkers, ispell works by reading an input file word by word, stopping when a word is not found in its dictionary.
en.wikipedia.org Though the game is played with chess pieces it is actually a variant of hexagonal checkers, albeit with three unusual features.
en.wikipedia.org Patients played softball, tennis, bowling, tennis, handball, shuffleboard, volleyball, chess, checkers, cards, gymnastics, ping pong and quoits.
en.wikipedia.org Checkers can weave back and forth between the two grids as well which increases the number of ways to place four in a row.
en.wikipedia.org