51 is usually played with two players but since it is a race to 0 any number of players can play with no variation in the basic rules. Each player starts with 51 points. First person to achieve a score of 0 exactly wins. The trick is, in order to subtract points, your totaled score for the round must total to something divisible by 5, and all darts must contribute 1 or more points to that total. So if any one of your darts hits a non-scoreable area, that is a bust for the round. This rule also applies to the last round. When you win the game, all three of your darts must score. Once you have a total that is divisible by 5 (leaving an integer), you subtract the dividend from your score. An example:
- I throw my three darts and hit a 20, 1, and 19. Totals to 40, divided by 5 is 8, so I subtract 8 from my score and now I drop from the initial 51 down to 43.
- Next round I hit a 20, 1, and 57. Totals to 78 which is not evenly divisible by 5. Thus my score for the round is 0.
- Next round I hit a 60, 5, and the third darts bounces out. All darts must score so that round is a bust.
A nice finish in a quick (very quick) game of 51 at work. That 145 translates into 29 score-able points. The game below occurred on Dec 20, 2010. I have no idea anymore what I was throwing in that game. Might have been my old Co Stompe Matchsticks.