Initial VIPR
3.2500
Registry seed
Current VIPR
3.2935
After latest rated game
Net Movement
+0.0435
Current minus initial
Record
3-1
75% win rate · 4 rated games
Storyline
John Gralton entered VIPR with an initial registry rating of 3.2500. Across 4 rated doubles games, the player went 3-1 and moved +0.0435, finishing at 3.2935.
Why It Moved
AI-generated explanation: The 3-1 record produced +0.0491 from wins and -0.0056 from losses, for a net move of +0.0435. The biggest single-game impact was +0.0171 against Debbie Hellman as partner and Alejandra Bussey / James Peavley as opponents. In game #2 on 2026-10-13, the player's team was the lower-rated team, so the win carried a larger gain: player team 3.2743 vs opponent team 3.5837.
Partner Chemistry
Partnership patterns are starting to emerge.
John's most common partner signals so far: Debbie Hellman (1-0, 100%), Mike Fritz (1-0, 100%), Ted Abelson (1-0, 100%), Eric Jones (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
John has faced James Peavley 4 times - record: 3-1. Clear ownership of the matchup.
Session Summary
| Date | W-L | Start | End | Net |
|---|---|---|---|---|
| 2026-10-13 | 3-1 | 3.2500 | 3.2935 | +0.0435 |
Game-By-Game Rating Trail
| # | Date | Result | Score | Partner | Opponents | Before | Change | After |
|---|---|---|---|---|---|---|---|---|
| 1 | 2026-10-13 Santiago Club - Team 3 vs Team 4 |
Win | 22-20 | Ted Abelson | James Peavley / Michael Kravatz | 3.2500 | +0.0155 | 3.2655 |
| 2 | 2026-10-13 Santiago Club - Team 3 vs Team 4 |
Win | 21-18 | Debbie Hellman | Alejandra Bussey / James Peavley | 3.2655 | +0.0171 | 3.2826 |
| 3 | 2026-10-13 Santiago Club - Team 3 vs Team 4 |
Loss | 18-21 | Eric Jones | James Peavley / David Choate | 3.2826 | -0.0056 | 3.2770 |
| 4 | 2026-10-13 Santiago Club - Team 3 vs Team 4 |
Win | 21-17 | Mike Fritz | Tony Birchall / James Peavley | 3.2770 | +0.0165 | 3.2935 |
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 | 3.3187 | 3.5344 | -0.2157 | +0.0155 |
| 2 | 3.2743 | 3.5837 | -0.3093 | +0.0171 |
| 3 | 3.1988 | 3.3626 | +0.1638 | -0.0056 |
| 4 | 3.5087 | 3.7769 | -0.2682 | +0.0165 |
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 -0.2157 -> computed delta +0.0155; 3.2500 +0.0155 = 3.2655