Initial VIPR
2.6920
Registry seed
Current VIPR
2.7009
After latest rated game
Net Movement
+0.0089
Current minus initial
Record
5-3
62% win rate · 8 rated games
Storyline
Cheryl Prochilo entered VIPR with an initial registry rating of 2.6920. Across 8 rated doubles games, the player went 5-3 and moved +0.0089, finishing at 2.7009.
Why It Moved
AI-generated explanation: The 5-3 record produced +0.0414 from wins and -0.0325 from losses, for a net move of +0.0089. The biggest single-game impact was -0.0133 against Courtney Robinson as partner and Tammy Wilson / Carol Spano as opponents. In game #3 on 2026-07-02, VIPR expected the player's team to have the edge, so the loss carried a larger drop: player team 2.7063 vs opponent team 2.5873.
Partner Chemistry
Partnership patterns are starting to emerge.
Cheryl's most common partner signals so far: Courtney Robinson (1-1, 50%), Cynthia Speiran (1-0, 100%), Deborah Austin (1-0, 100%), Jackie Huckins (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
Cheryl has faced Tammy Wilson 3 times - record: 1-2. A close matchup worth watching.
Session Summary
| Date | W-L | Start | End | Net |
|---|---|---|---|---|
| 2026-07-02 | 2-2 | 2.6920 | 2.6893 | -0.0027 |
| 2026-07-16 | 3-1 | 2.6893 | 2.7009 | +0.0116 |
Game-By-Game Rating Trail
| # | Date | Result | Score | Partner | Opponents | Before | Change | After |
|---|---|---|---|---|---|---|---|---|
| 1 | 2026-07-02 | Win | 11-8 | Jackie Huckins | Courtney Robinson / Tammy Wilson | 2.6920 | +0.0115 | 2.7035 |
| 2 | 2026-07-02 | Loss | 7-11 | Carol Spano | Tammy Wilson / Jackie Huckins | 2.7035 | -0.0080 | 2.6955 |
| 3 | 2026-07-02 | Loss | 7-11 | Courtney Robinson | Tammy Wilson / Carol Spano | 2.6955 | -0.0133 | 2.6822 |
| 4 | 2026-07-02 | Win | 11-7 | Courtney Robinson | Jackie Huckins / Carol Spano | 2.6822 | +0.0071 | 2.6893 |
| 5 | 2026-07-16 | Win | 11-9 | Cynthia Speiran | Marcia Adelman / Deborah Austin | 2.6893 | +0.0099 | 2.6992 |
| 6 | 2026-07-16 | Loss | 7-11 | Janet Krasinski | Cynthia Speiran / Marcia Adelman | 2.6992 | -0.0112 | 2.6880 |
| 7 | 2026-07-16 | Win | 11-3 | Marcia Adelman | Deborah Austin / Janet Krasinski | 2.6880 | +0.0101 | 2.6981 |
| 8 | 2026-07-16 | Win | 11-3 | Deborah Austin | Cynthia Speiran / Janet Krasinski | 2.6981 | +0.0028 | 2.7009 |
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 | 2.6605 | 2.7122 | -0.0517 | +0.0115 |
| 2 | 2.5953 | 2.6672 | +0.0719 | -0.0080 |
| 3 | 2.7063 | 2.5873 | -0.1189 | -0.0133 |
| 4 | 2.6930 | 2.5880 | +0.1050 | +0.0071 |
| 5 | 2.5487 | 2.5453 | +0.0034 | +0.0099 |
| 6 | 2.4826 | 2.4415 | -0.0411 | -0.0112 |
| 7 | 2.5047 | 2.5079 | -0.0032 | +0.0101 |
| 8 | 2.7285 | 2.4124 | +0.3162 | +0.0028 |
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 -0.0517 -> computed delta +0.0115; 2.6920 +0.0115 = 2.7035