Both a 9-dart finish in darts and a 147 snooker break are extremely difficult achievements in their respective sports, and it can be debated which one is harder to achieve.
In darts, a 9-dart finish is when a player hits the perfect combination of nine darts to finish a leg, starting with a score of 501 and finishing with a double. This requires the player to hit five maximum scores of 180, along with a combination of treble 20s, treble 19s, and/or treble 17s, followed by a double. The odds of achieving a 9-dart finish are estimated to be around 1 in 10,000 for professional players.
On the other hand, in snooker, a 147 break is when a player pots all 15 reds with a black ball, followed by all six colours in a single visit to the table. This requires the player to show exceptional skill and precision in their shot-making, as well as a deep understanding of the angles and spin of the cue ball. The odds of achieving a 147 break are estimated to be around 1 in 10,000 for professional players.
So, both a 9-dart finish and a 147 break are extremely rare achievements in their respective sports, and it can be difficult to determine which one is harder to achieve. However, some may argue that a 147 break in snooker may be slightly harder to achieve because it requires a player to maintain their focus and accuracy for a longer period of time and involves more balls to pot compared to a 9-dart finish in darts.