Initial VIPR
3.6900
Registry seed
Current VIPR
3.7169
After latest rated game
Net Movement
+0.0269
Current minus initial
Record
6-2
75% win rate · 8 rated games
Storyline
Erin DeFrates entered VIPR with an initial registry rating of 3.6900. Across 8 rated doubles games, the player went 6-2 and moved +0.0269, finishing at 3.7169.
Why It Moved
AI-generated explanation: The 6-2 record produced +0.0467 from wins and -0.0198 from losses, for a net move of +0.0269. The biggest single-game impact was -0.0141 against Jolynne Colvin as partner and Laura Marchisello / Sharon McFarland as opponents. In game #7 on 2026-07-23, VIPR expected the player's team to have the edge, so the loss carried a larger drop: player team 3.6972 vs opponent team 3.5444.
Partner Chemistry
Partnership patterns are starting to emerge.
Erin's most common partner signals so far: Sharon McFarland (1-1, 50%), Jean Narod (1-0, 100%), Laura Marchisello (1-0, 100%), Michele Blanchard (1-0, 100%). No partnership has reached both the 8+ match and 75%+ win-rate marker yet, so treat this as directional.
Streaks & Rivalries
Rivalry
Erin has faced Sharon McFarland 4 times - record: 3-1. Clear ownership of the matchup.
Session Summary
| Date | W-L | Start | End | Net |
|---|---|---|---|---|
| 2026-07-02 | 3-1 | 3.6900 | 3.7057 | +0.0157 |
| 2026-07-23 | 3-1 | 3.7057 | 3.7169 | +0.0112 |
Game-By-Game Rating Trail
| # | Date | Result | Score | Partner | Opponents | Before | Change | After |
|---|---|---|---|---|---|---|---|---|
| 1 | 2026-07-02 | Win | 11-6 | Sue Reich | Michele Blanchard / Sandy Zutter | 3.6900 | +0.0065 | 3.6965 |
| 2 | 2026-07-02 | Win | 11-9 | Sandy Zutter | Michele Blanchard / Sharon McFarland | 3.6965 | +0.0068 | 3.7033 |
| 3 | 2026-07-02 | Win | 11-7 | Michele Blanchard | Sue Reich / Sharon McFarland | 3.7033 | +0.0081 | 3.7114 |
| 4 | 2026-07-02 | Loss | 6-11 | Sharon McFarland | Sue Reich / Sandy Zutter | 3.7114 | -0.0057 | 3.7057 |
| 5 | 2026-07-23 | Win | 11-1 | Laura Marchisello | Jolynne Colvin / Jean Narod | 3.7057 | +0.0038 | 3.7095 |
| 6 | 2026-07-23 | Win | 11-4 | Jean Narod | Jolynne Colvin / Sharon McFarland | 3.7095 | +0.0098 | 3.7193 |
| 7 | 2026-07-23 | Loss | 5-11 | Jolynne Colvin | Laura Marchisello / Sharon McFarland | 3.7193 | -0.0141 | 3.7052 |
| 8 | 2026-07-23 | Win | 11-5 | Sharon McFarland | Laura Marchisello / Jean Narod | 3.7052 | +0.0117 | 3.7169 |
Formula Homework
These rows show the team ratings used in the adjustment calculation. The computed delta is the signed rating change produced by the current v0.6 formula.
| # | Player Team ( AVG ) | Opponent Team ( AVG ) | Winner-Loser VIPR Diff | Computed Delta |
|---|---|---|---|---|
| 1 | 3.7419 | 3.6153 | +0.1266 | +0.0065 |
| 2 | 3.6286 | 3.5126 | +0.1160 | +0.0068 |
| 3 | 3.6476 | 3.5795 | +0.0681 | +0.0081 |
| 4 | 3.5231 | 3.6809 | +0.1578 | -0.0057 |
| 5 | 3.7573 | 3.5028 | +0.2545 | +0.0038 |
| 6 | 3.5026 | 3.4961 | +0.0065 | +0.0098 |
| 7 | 3.6972 | 3.5444 | -0.1529 | -0.0141 |
| 8 | 3.5135 | 3.5722 | -0.0587 | +0.0117 |
Rating movement formula
Team VIPR = average - (average - lower partner) * CRF, with CRF = 0.40.
Adjustment = 0.02 / (1 + 10 ^ (2.5 * (winner team VIPR - loser team VIPR))).
Winning partners both receive +adjustment. Losing partners both receive -adjustment.
Score margin is recorded for context but is not currently part of the v0.6 formula.
First game check: winner-loser VIPR diff +0.1266 -> computed delta +0.0065; 3.6900 +0.0065 = 3.6965