Bones is a relatively simple scoring game.
The Roll A player rolls all six dice at the start of their turn. From their roll, they choose which 'scoring' dice they wish to reserve. They don't have to reserve 'all' of the scoring dice, but they must reserve at least one dice in order to continue. Through If all rolled dice are able to score, then this is called a 'roll through'. They gather up all six dice again and continue accumulating their score.