Winning at darts is dependent upon the type of dart game played.
The following site seems to explain each game well:
http://www.recroom-products.com/howtoplaydarts.html
in the event of a tie break the highest score obtained in nine darts wins.
Golf is the only sport where lowest score wins
To play darts effectively and keep score, aim to hit the target on the dartboard with precision. Each player takes turns throwing three darts per round, aiming to score points by hitting specific areas on the board. Keep track of points by subtracting the score from the total at the start of each round. The player with the highest score at the end wins.
Impossible as maximum score with 2 darts is 120! T17-D20 and T19-D17
You can score 180 on darts
Darts
60, the highest single-dart score on the board
12
The least number of darts needed to score 501 points in a standard game of darts is 9 darts. This can be achieved by scoring three triple 20s (60 points each for a total of 180 points) and then finishing with three more darts that score 180 points combined, such as two triple 20s and a double 20.
180 is the highest score in darts. Three triple 20s is worth 180 points.
A shanghai is a single, a double, and a triple of the same number in one throw of three darts.
The smallest number that you can't score with 3 darts, not including 1, is 4. With 3 darts, you can score any number from 3 (by hitting a score of 1 with each dart) up to 60 (hitting three triple 20s), but you cannot reach the score of 4 using the available scores on a dartboard.