Fifty-One by Fives
Numbers in Play: All the numbers on the dartboard are used, but the score of every three-dart turn must be divisible by 5, so the commonly aimed-for numbers are those divisible by five: 20, 15, 10, 5.
Rules of Play:
The total points for each turn must be divisible by five to receive any score. The score for each turn is determined by the number of fives hit. For example, if a player gets 20 points on a turn, the score is 4 because 20 divided by 5 is 4. If a score for an entire turn is not divisible by 5, it is not counted. All numbers on the board are used, including triples, doubles and bulls. The winner is the first player to score fifty-one fives and all three darts must score on the last turn.