Statistics Profile

Vivienne Birz (Vivi)

Verified
2015
Arena Fencing Academy LLC

Current strength

Weapon Type Strength Estimate Range* Min Max
Épée Pool 533 356 - 709 -168 533
Épée Direct elimination 1132 857 - 1406 794 2079

* 95% confidence interval of the estimate (μ ± 2σ).

Matchup against me

Register to view this matchup

Create a free account with your USFA number to unlock projected win chances and strength changes.

Create account Log in

Strength over time

Daily results are combined into one point. Dashed stretches indicate a less stable estimate.

How it works

  • Strength is a numeric summary of how a fencer has performed against other fencers over time.
  • The estimate usually settles after about 12 bouts, so early data can move sharply.
  • New fencers begin around 2500, but with high uncertainty.
  • Pools, direct eliminations, and mixed-gender bouts are tracked separately.
  • The scale runs from roughly 0 to 5000, with the average around 2500.
  • Beating much stronger fencers moves the estimate more than beating weaker ones.
  • Win probability reflects rating differences only, not style matchups or familiarity.
  • Per-bout changes are available in bout history.