Initial VIPR
3.6900
Registry seed
Current VIPR
3.7094
After latest rated game
Net Movement
+0.0194
Current minus initial
Record
11-5
69% win rate · 16 rated games
Storyline
Erin DeFrates entered VIPR with an initial registry rating of 3.6900. Across 16 rated doubles games, the player went 11-5 and moved +0.0194, finishing at 3.7094.
Why It Moved
AI-generated explanation: The 11-5 record produced +0.0758 from wins and -0.0564 from losses, for a net move of +0.0194. 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: Alejandra Bussey (2-0, 100%), Gene Konzen (1-1, 50%), Sharon McFarland (1-1, 50%), Sue Dahl (1-1, 50%). 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 Sandy Zutter 6 times - record: 5-1. 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 |
| 2026-10-13 | 1-3 | 3.7169 | 3.6856 | -0.0313 |
| 2026-10-20 | 4-0 | 3.6856 | 3.7094 | +0.0238 |
Game-By-Game Rating Trail
| # | Date | Result | Score | Partner | Opponents | Before | Change | After |
|---|---|---|---|---|---|---|---|---|
| 1 | 2026-07-02 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-6 | Sue Reich | Michele Blanchard / Sandy Zutter | 3.6900 | +0.0065 | 3.6965 |
| 2 | 2026-07-02 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-9 | Sandy Zutter | Michele Blanchard / Sharon McFarland | 3.6965 | +0.0068 | 3.7033 |
| 3 | 2026-07-02 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-7 | Michele Blanchard | Sue Reich / Sharon McFarland | 3.7033 | +0.0081 | 3.7114 |
| 4 | 2026-07-02 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 6-11 | Sharon McFarland | Sue Reich / Sandy Zutter | 3.7114 | -0.0057 | 3.7057 |
| 5 | 2026-07-23 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-1 | Laura Marchisello | Jolynne Colvin / Jean Narod | 3.7057 | +0.0038 | 3.7095 |
| 6 | 2026-07-23 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-4 | Jean Narod | Jolynne Colvin / Sharon McFarland | 3.7095 | +0.0098 | 3.7193 |
| 7 | 2026-07-23 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 5-11 | Jolynne Colvin | Laura Marchisello / Sharon McFarland | 3.7193 | -0.0141 | 3.7052 |
| 8 | 2026-07-23 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-5 | Sharon McFarland | Laura Marchisello / Jean Narod | 3.7052 | +0.0117 | 3.7169 |
| 9 | 2026-10-13 Santiago Club - Team 3 vs Team 4 |
Loss | 20-21 | Gene Konzen | Barb O'Connor / Stephen Bussey | 3.7169 | -0.0130 | 3.7039 |
| 10 | 2026-10-13 Santiago Club - Team 3 vs Team 4 |
Win | 21-12 | Alejandra Bussey | Barb O'Connor / Debbie Hellman | 3.7039 | +0.0053 | 3.7092 |
| 11 | 2026-10-13 Santiago Club - Team 3 vs Team 4 |
Loss | 15-21 | Tom Hertz | Barb O'Connor / Chris Eversole | 3.7092 | -0.0116 | 3.6976 |
| 12 | 2026-10-13 Santiago Club - Team 3 vs Team 4 |
Loss | 17-21 | Sue Dahl | Nancy OBrien / Barb O'Connor | 3.6976 | -0.0120 | 3.6856 |
| 13 | 2026-10-20 Santiago Club - Team 3 vs Team 1 |
Win | 22-20 | Sue Dahl | Mary Seifert / Sandy Zutter | 3.6856 | +0.0083 | 3.6939 |
| 14 | 2026-10-20 Santiago Club - Team 3 vs Team 1 |
Win | 21-10 | Alejandra Bussey | Sandy Zutter / Kerry Ferrero | 3.6939 | +0.0034 | 3.6973 |
| 15 | 2026-10-20 Santiago Club - Team 3 vs Team 1 |
Win | 21-10 | Doug Kellogg | Sandy Zutter / Greg Dodge | 3.6973 | +0.0056 | 3.7029 |
| 16 | 2026-10-20 Santiago Club - Team 3 vs Team 1 |
Win | 21-16 | Gene Konzen | Sandy Zutter / Paul Randour | 3.7029 | +0.0065 | 3.7094 |
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 |
| 9 | 3.8159 | 3.7078 | -0.1081 | -0.0130 |
| 10 | 3.5751 | 3.3973 | +0.1778 | +0.0053 |
| 11 | 3.8998 | 3.8425 | -0.0574 | -0.0116 |
| 12 | 3.7713 | 3.7026 | -0.0687 | -0.0120 |
| 13 | 3.7593 | 3.6986 | +0.0607 | +0.0083 |
| 14 | 3.5869 | 3.3106 | +0.2764 | +0.0034 |
| 15 | 3.8647 | 3.6998 | +0.1649 | +0.0056 |
| 16 | 3.8082 | 3.6826 | +0.1256 | +0.0065 |
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