Initial VIPR
3.6150
Registry seed
Current VIPR
3.5726
After latest rated game
Net Movement
-0.0424
Current minus initial
Record
2-6
25% win rate · 8 rated games
Storyline
Robert McCollough entered VIPR with an initial registry rating of 3.6150. Across 8 rated doubles games, the player went 2-6 and moved -0.0424, finishing at 3.5726.
Why It Moved
AI-generated explanation: The 2-6 record produced +0.0233 from wins and -0.0657 from losses, for a net move of -0.0424. The biggest single-game impact was -0.0170 against Joseph Weber as partner and Robert Nunn / Sunil Sadhwani as opponents. In game #8 on 2026-07-23, VIPR expected the player's team to have the edge, so the loss carried a larger drop: player team 3.7639 vs opponent team 3.4631.
Partner Chemistry
Partnership patterns are starting to emerge.
Robert's most common partner signals so far: Sunil Sadhwani (1-1, 50%), Kevin Geraty (0-2, 0%), Mathis Hediger (1-0, 100%), Joel Lancaster (0-1, 0%). No partnership has reached both the 8+ match and 75%+ win-rate marker yet, so treat this as directional.
Streaks & Rivalries
Rivalry
Robert has faced Kevin Geraty 4 times - record: 1-3. A tough matchup so far.
Session Summary
| Date | W-L | Start | End | Net |
|---|---|---|---|---|
| 2026-07-16 | 1-3 | 3.6150 | 3.5907 | -0.0243 |
| 2026-07-23 | 1-3 | 3.5907 | 3.5726 | -0.0181 |
Game-By-Game Rating Trail
| # | Date | Result | Score | Partner | Opponents | Before | Change | After |
|---|---|---|---|---|---|---|---|---|
| 1 | 2026-07-16 | Loss | 8-11 | Sunil Sadhwani | Joel Lancaster / Kevin Geraty | 3.6150 | -0.0057 | 3.6093 |
| 2 | 2026-07-16 | Win | 11-1 | Mathis Hediger | Sunil Sadhwani / Joel Lancaster | 3.6093 | +0.0110 | 3.6203 |
| 3 | 2026-07-16 | Loss | 4-11 | Joel Lancaster | Kevin Geraty / Mathis Hediger | 3.6203 | -0.0153 | 3.6050 |
| 4 | 2026-07-16 | Loss | 6-11 | Kevin Geraty | Sunil Sadhwani / Mathis Hediger | 3.6050 | -0.0143 | 3.5907 |
| 5 | 2026-07-23 | Loss | 6-11 | Kevin Geraty | Joseph Weber / Sunil Sadhwani | 3.5907 | -0.0080 | 3.5827 |
| 6 | 2026-07-23 | Loss | 1-11 | Robert Nunn | Joseph Weber / Kevin Geraty | 3.5827 | -0.0054 | 3.5773 |
| 7 | 2026-07-23 | Win | 11-9 | Sunil Sadhwani | Robert Nunn / Kevin Geraty | 3.5773 | +0.0123 | 3.5896 |
| 8 | 2026-07-23 | Loss | 7-11 | Joseph Weber | Robert Nunn / Sunil Sadhwani | 3.5896 | -0.0170 | 3.5726 |
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 | 3.4532 | 3.6141 | +0.1609 | -0.0057 |
| 2 | 3.4899 | 3.5241 | -0.0342 | +0.0110 |
| 3 | 3.6805 | 3.4759 | -0.2045 | -0.0153 |
| 4 | 3.5680 | 3.4064 | -0.1617 | -0.0143 |
| 5 | 3.5658 | 3.6361 | +0.0703 | -0.0080 |
| 6 | 3.5606 | 3.7325 | +0.1719 | -0.0054 |
| 7 | 3.4677 | 3.5477 | -0.0801 | +0.0123 |
| 8 | 3.7639 | 3.4631 | -0.3008 | -0.0170 |
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 +0.1609 -> computed delta -0.0057; 3.6150 -0.0057 = 3.6093