If 2 players in a group have the same score then both will advance. Tournament Directors can choose to use an additional tie-break method (we use the Neustadtl score) which factors in the strength of the opponents. If two players have the same score and the same Tie Break score, both will advance.
What is the meaning of tiebreak? How it effect the winner player in the same quantity of winning but different number of tiebreak.