PTI Statistics: 2.0 vs 2.4 Comparison

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Filters apply to the first 5 statistics below.
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Total Players
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Total Matches
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Avg Change (2.4 - 2.0)
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Median Change

Direction of Change

How many players are rated higher or lower in PTI 2.4 compared to 2.0

- higher in 2.4 - lower in 2.4

Distribution of Rating Changes

Histogram showing the spread of (PTI 2.4 - PTI 2.0) across all players' most recent ratings

Rating Distribution Shape

Overlaid histograms of final ratings in PTI 2.0 vs 2.4. Shows whether 2.4 compresses (narrows) or expands (widens) the rating scale.

Metric PTI 2.0 PTI 2.4 Diff
Percentile PTI 2.0 PTI 2.4 Diff

Magnitude of Changes

Players grouped by how much their rating changed (absolute value)

Change by Rating Percentile

Players grouped by their PTI 2.0 rating percentile, showing average change and standard deviation

Percentile Rating Range Avg PTI 2.0 Avg PTI 2.4 Avg Change Std Dev Players

Rating Change by Player Experience

Average rating change (2.4 - 2.0) grouped by number of matches played (20 equal-sized buckets)

Matches Played Players Avg Change Std Dev

Ranking Preservation

Of random player pairs, how often is the relative ranking (A > B or B > A) preserved between 2.0 and 2.4?

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Preserved
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Reversed
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Tied (one or both systems)
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Sample Size

Per-Match Volatility by Experience

Average |after - before| grouped by match number in player's history (1st match, 2nd match, etc.)

Match # Player-Matches Avg Volatility 2.0 Avg Volatility 2.4 Difference

Sigma (Uncertainty) by Experience

Average sigma after each match number, with 5th/95th percentile range.

Sigma Change Magnitude by Experience

Average |sigmaAfter - sigmaBefore| by match number. Shows how much sigma changes per match as players gain experience.

Rating Trajectory Divergence

Average absolute divergence |PTI 2.4 - PTI 2.0| at each match number, averaged across all players. Shows whether the algorithms diverge progressively or reach equilibrium.

Most Impacted Players

Players with the largest absolute difference between PTI 2.0 and 2.4 in their most recent rating

Player Matches PTI 2.0 PTI 2.4 Change

Biggest Single-Match Differences

Matches where the rating change (after - before) differed most between PTI 2.0 and 2.4

Player Experience Date 2.0 Change 2.4 Change Difference