A plays B.  C plays D.  winners plays (by symmetry, assume A beats C).  C plays E
IF C WINS, C plays F, and the winner plays A best-of-3
IF E WINS, E plays F
   IF E WINS, A plays E best-of-3
   IF F WINS, A plays F
      IF A WINS, A plays E twice (A wins ties)
      IF F WINS, A plays F twice (F wins ties)