When the remaining points go below zero, it’s called a BUST. In case of a BUST, your round ends there even if you did not throw your 3 darts . Your next round starts with the score you had before the BUST. 01 has 6 types: 301, 501, 701, 901, 1101, and 1501. The player that lower his/her score to exactly 0 first, wins.