Notable Info

• Slight tweak to last week’s update regarding quality performance handling.

Notable Info

• Improved handling of quality performance decay in situations where a fighter is close to a quality performance.  Instead of decay ON/OFF, there is now a small zone of partial decay to ensure a gradual roll-off.

Notable Info

• Lightweight rankings expanded from 500 fighters to 600 — the most in any division.
• Bantamweight rankings expanded from 250 fighters to 300.
• Women’s Strawweight rankings expanded from 20 fighters to 25.

Notable Info

• This is a fairly large update, as we have used retroactive predictive analysis to determine the most ‘accurate’ rates at which to penalize inactivity and quality performance decay.   These types of penalties have always been guesswork and we were close, but now they are more accurate than they’ve ever been.  With the latest rankings, these new rates are now in place.  Note: When making these types of changes, predictive rates aren’t the primary driver — more like the secondary, but they are most definitely used when large amounts of useful data is available.
• Essentially, inactivity was being over-penalized by about 25%.  On the other hand, fighters in “quality performance decay” were being under-penalized by about 35%.  This sounds like a lot, but there have always been self-correction methods in place that will remain in place (though this has been modified too) to handle outliers.  All in all, the fluctuations in the top part of the rankings are slight.  However, beyond the Top 100s, there will be a lot of movement.

Notable Info

• Intermediate update to resolve bug found in P4P ratings.  Rin Nakai was the only ranked fighter of either gender that was affected.  As a result of the fix, she is no longer ranked.