I don’t know the exact way, but the tiebreaker score is determined on if you win or loss in a game and how that opponent does the rest of the tournament. So if you lose and your opponent dies really good you will get something for your tiebreaker score. And vice-versa if you lose and they leave the tournament you won’t get anything added. Hopefully this helps you.
So, I just wrapped up a blitz tournament on chess.com. Scored 6/7. Pretty impressive, right? I mean, that’s gotta be good enough for a top-three finish, right? Wrong. Dead wrong. Turns out, 6/7 only gets you the glorious 4th place. Why? Because of my legendary tiebreak score.
The guys in 2nd and 3rd also had 6/7, but apparently, the chess gods decided I’m not quite podium material. As for how tiebreaks are calculated? Honestly, it could be anything—opponent strength, moon phase, whether or not I used the Sicilian in round 3... Your guess is as good as mine.
In conclusion, chess isn't about skill or consistency. It’s about pleasing the almighty tiebreak system, which I clearly forgot to bribe. Next time, I’ll bring a sacrifice—probably my queen.