Initial VIPR
3.5180
Registry seed
Current VIPR
3.4914
After latest rated game
Net Movement
-0.0266
Current minus initial
Record
1-3
25% win rate · 4 rated games
Storyline
Cheryl Hallgren entered VIPR with an initial registry rating of 3.5180. Across 4 rated doubles games, the player went 1-3 and moved -0.0266, finishing at 3.4914.
Why It Moved
AI-generated explanation: The 1-3 record produced +0.0038 from wins and -0.0304 from losses, for a net move of -0.0266. The biggest single-game impact was -0.0169 against Cheri Kazee as partner and Cindy Demaio / Judith DeJaco as opponents. In game #2 on 2026-10-29, VIPR expected the player's team to have the edge, so the loss carried a larger drop: player team 3.5342 vs opponent team 3.2420.
Partner Chemistry
Partnership patterns are starting to emerge.
Cheryl's most common partner signals so far: Jeanan Delp (1-0, 100%), Cheri Kazee (0-1, 0%), Cindy Demaio (0-1, 0%), Judith DeJaco (0-1, 0%). No partnership has reached both the 8+ match and 75%+ win-rate marker yet, so treat this as directional.
Streaks & Rivalries
Streak
Cheryl is currently on a 3-game losing streak in rated VIPR games.
Session Summary
| Date | W-L | Start | End | Net |
|---|---|---|---|---|
| 2026-10-29 | 1-3 | 3.5180 | 3.4914 | -0.0266 |
Game-By-Game Rating Trail
| # | Date | Result | Score | Partner | Opponents | Before | Change | After |
|---|---|---|---|---|---|---|---|---|
| 1 | 2026-10-29 Thursday Ladies Ladder League - Fall 2026 |
Win | 11-6 | Jeanan Delp | Cindy Demaio / Cheri Kazee | 3.5180 | +0.0038 | 3.5218 |
| 2 | 2026-10-29 Thursday Ladies Ladder League - Fall 2026 |
Loss | 8-11 | Cheri Kazee | Cindy Demaio / Judith DeJaco | 3.5218 | -0.0169 | 3.5049 |
| 3 | 2026-10-29 Thursday Ladies Ladder League - Fall 2026 |
Loss | 4-11 | Cindy Demaio | Jeanan Delp / Judith DeJaco | 3.5049 | -0.0033 | 3.5016 |
| 4 | 2026-10-29 Thursday Ladies Ladder League - Fall 2026 |
Loss | 6-11 | Judith DeJaco | Jeanan Delp / Cheri Kazee | 3.5016 | -0.0102 | 3.4914 |
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 | 3.5030 | 3.2491 | +0.2538 | +0.0038 |
| 2 | 3.5342 | 3.2420 | -0.2922 | -0.0169 |
| 3 | 3.2397 | 3.5208 | +0.2811 | -0.0033 |
| 4 | 3.5235 | 3.5152 | -0.0083 | -0.0102 |
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 +0.2538 -> computed delta +0.0038; 3.5180 +0.0038 = 3.5218