1.9 KiB
1.9 KiB
Rating System Comparison: Glicko-2 vs Pure ELO
Overview
This analysis replays all historical matches through the new ELO system to compare ratings.
Key differences:
- Old system: Glicko-2 with separate singles/doubles ratings, RD, volatility
- New system: Pure ELO with unified rating, per-point scoring, effective opponent formula
Summary
- Total Players: 6
- Total Matches Replayed: 29
- K-Factor: 32
- Analysis Date: 2026-02-26 11:55:18
Ratings Comparison (Sorted by New ELO)
| Rank | Player | Glicko-2 Avg | New ELO | Diff | Matches |
|---|---|---|---|---|---|
| 1 | Andrew Stricklin | 1651 | 1538 | -113 | 19 |
| 2 | David Pabst | 1562 | 1522 | -40 | 11 |
| 3 | Jacklyn Wyszynski | 1557 | 1514 | -43 | 9 |
| 4 | Eliana Crew | 1485 | 1497 | +11 | 13 |
| 5 | Krzysztof Radziszeski | 1473 | 1476 | +3 | 25 |
| 6 | Dane Sabo | 1290 | 1449 | +159 | 25 |
Key Insights
Biggest Winners (rating increased)
- Dane Sabo: +159 points (Glicko avg 1290 → ELO 1449)
- Eliana Crew: +11 points (Glicko avg 1485 → ELO 1497)
- **Krzysztof Radziszeski **: +3 points (Glicko avg 1473 → ELO 1476)
Biggest Losers (rating decreased)
- Andrew Stricklin: -113 points (Glicko avg 1651 → ELO 1538)
- Jacklyn Wyszynski: -43 points (Glicko avg 1557 → ELO 1514)
- David Pabst: -40 points (Glicko avg 1562 → ELO 1522)
Why Ratings Changed
The new system differs in several ways:
-
Per-point scoring: Instead of just win/loss, we use
points_won / total_points. Winning 11-9 gives less credit than winning 11-2. -
Effective opponent formula: In doubles, your effective opponent is calculated as
Opp1 + Opp2 - Teammate. This means:- Strong teammate → lower effective opponent → less credit for winning
- Weak teammate → higher effective opponent → more credit for winning
-
Unified rating: Singles and doubles contribute to one rating instead of two.