One of the harder achievements in the game. You must place nine darts perfectly to finish a game in the minimum amount of turns. This will take a bit of maths here too, and here’s one of the methods to get 501 in 3 turns (9 darts)
Turn 1 - Triple 20, Triple 20, Triple 19
Turn 2 - Triple 20, Triple 20, Triple 18
Turn 3 - Triple 20, Triple 20, Double 15
The Triple 20 area gets a little crowded, but it’s probably the most comfortable place to shoot a triple. Hitting the T-19 is necessary because the final 501 score is an odd number, and the T-18 is just so you don’t have to squeeze three darts into T-20. If you get anything less than triple on throws 1-8 it will be impossible to finish with nine darts, so start over should this occur. The last throw must be a double or bullseye.