It's actually pretty clear once won gets through legal gobbledy-***
Tie breaker is ….
First last 9 holes,
2nd, last 6 holes,
3rd last 3 holes
then, starting at last hole and moving backwards, hole-by-hole comparison.
And if you shot identical scores on last 9 holes, 1st to post the score.
It never pays to make a mistake, but in tie-breaker, it pays to make it early.