Initial VIPR
2.5240
Registry seed
Current VIPR
2.6800
After latest rated game
Net Movement
+0.1560
Current minus initial
Record
18-14
56% win rate · 32 rated games
Storyline
Joy McCormick entered VIPR with an initial registry rating of 2.5240. Across 32 rated doubles games, the player went 18-14 and moved +0.1560, finishing at 2.6800.
Why It Moved
AI-generated explanation: The 18-14 record produced +0.2250 from wins and -0.0690 from losses, for a net move of +0.1560. The biggest single-game impact was +0.0173 against Elena Gordon as partner and Rose Kopja / Kathi Lancaster as opponents. In game #27 on 2026-08-27, the player's team was the lower-rated team, so the win carried a larger gain: player team 2.7340 vs opponent team 3.0582.
Partner Chemistry
Partnership patterns are starting to emerge.
Joy's most common partner signals so far: Kathi Lancaster (3-0, 100%), Debbie Chaffee (1-1, 50%), Mary LaFrancois (1-1, 50%), Michele Chew (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
Joy has faced Rose Kopja 5 times - record: 3-2. A close matchup worth watching.
Session Summary
| Date | W-L | Start | End | Net |
|---|---|---|---|---|
| 2026-07-09 | 2-2 | 2.5240 | 2.5301 | +0.0061 |
| 2026-07-16 | 4-0 | 2.5301 | 2.5578 | +0.0277 |
| 2026-07-23 | 3-1 | 2.5578 | 2.5849 | +0.0271 |
| 2026-08-06 | 2-2 | 2.5849 | 2.6128 | +0.0279 |
| 2026-08-13 | 2-2 | 2.6128 | 2.6337 | +0.0209 |
| 2026-08-20 | 0-4 | 2.6337 | 2.6171 | -0.0166 |
| 2026-08-27 | 3-1 | 2.6171 | 2.6609 | +0.0438 |
| 2026-09-03 | 2-2 | 2.6609 | 2.6800 | +0.0191 |
Game-By-Game Rating Trail
| # | Date | Result | Score | Partner | Opponents | Before | Change | After |
|---|---|---|---|---|---|---|---|---|
| 1 | 2026-07-09 | Win | 11-10 | Carol Spano | Kathi Lancaster / Jackie Huckins | 2.5240 | +0.0167 | 2.5407 |
| 2 | 2026-07-09 | Loss | 2-11 | Jackie Huckins | Carol Spano / Cynthia Speiran | 2.5407 | -0.0117 | 2.5290 |
| 3 | 2026-07-09 | Loss | 2-11 | Cynthia Speiran | Kathi Lancaster / Carol Spano | 2.5290 | -0.0037 | 2.5253 |
| 4 | 2026-07-09 | Win | 11-1 | Kathi Lancaster | Jackie Huckins / Cynthia Speiran | 2.5253 | +0.0048 | 2.5301 |
| 5 | 2026-07-16 | Win | 11-6 | Marie Shuey | Barbara Giometti / Pamela Uriarte | 2.5301 | +0.0025 | 2.5326 |
| 6 | 2026-07-16 | Win | 11-5 | Lynn Ratcliff | Marie Shuey / Barbara Giometti | 2.5326 | +0.0058 | 2.5384 |
| 7 | 2026-07-16 | Win | 11-0 | Barbara Giometti | Pamela Uriarte / Lynn Ratcliff | 2.5384 | +0.0048 | 2.5432 |
| 8 | 2026-07-16 | Win | 11-9 | Pamela Uriarte | Marie Shuey / Lynn Ratcliff | 2.5432 | +0.0146 | 2.5578 |
| 9 | 2026-07-23 | Win | 11-5 | Michele Chew | ANN DREWEK / Pilar Winters | 2.5578 | +0.0110 | 2.5688 |
| 10 | 2026-07-23 | Win | 11-4 | ANN DREWEK | Michele Chew / Pilar Winters | 2.5688 | +0.0118 | 2.5806 |
| 11 | 2026-07-23 | Win | 11-3 | Pilar Winters | Michele Chew / ANN DREWEK | 2.5806 | +0.0142 | 2.5948 |
| 12 | 2026-07-23 | Loss | 10-11 | Michele Chew | ANN DREWEK / Pilar Winters | 2.5948 | -0.0099 | 2.5849 |
| 13 | 2026-08-06 | Win | 11-5 | Lori Pulford | Gayle Kiefer / Julee Johanson | 2.5849 | +0.0169 | 2.6018 |
| 14 | 2026-08-06 | Loss | 2-11 | Julee Johanson | Gayle Kiefer / Karen Scott | 2.6018 | -0.0026 | 2.5992 |
| 15 | 2026-08-06 | Loss | 7-11 | Gayle Kiefer | Lori Pulford / Karen Scott | 2.5992 | -0.0028 | 2.5964 |
| 16 | 2026-08-06 | Win | 11-5 | Karen Scott | Lori Pulford / Julee Johanson | 2.5964 | +0.0164 | 2.6128 |
| 17 | 2026-08-13 | Loss | 8-11 | Dawn Mead | Julee Johanson / Mary LaFrancois | 2.6128 | -0.0051 | 2.6077 |
| 18 | 2026-08-13 | Win | 11-3 | Debbie Chaffee | Dawn Mead / Julee Johanson | 2.6077 | +0.0167 | 2.6244 |
| 19 | 2026-08-13 | Loss | 6-11 | Julee Johanson | Mary LaFrancois / Debbie Chaffee | 2.6244 | -0.0058 | 2.6186 |
| 20 | 2026-08-13 | Win | 11-7 | Mary LaFrancois | Dawn Mead / Debbie Chaffee | 2.6186 | +0.0151 | 2.6337 |
| 21 | 2026-08-20 | Loss | 10-11 | Renae Kray | Gayle Kiefer / Rose Kopja | 2.6337 | -0.0040 | 2.6297 |
| 22 | 2026-08-20 | Loss | 8-11 | Rose Kopja | Gayle Kiefer / Mary LaFrancois | 2.6297 | -0.0047 | 2.6250 |
| 23 | 2026-08-20 | Loss | 9-11 | Gayle Kiefer | Renae Kray / Mary LaFrancois | 2.6250 | -0.0047 | 2.6203 |
| 24 | 2026-08-20 | Loss | 3-11 | Mary LaFrancois | Renae Kray / Rose Kopja | 2.6203 | -0.0032 | 2.6171 |
| 25 | 2026-08-27 | Win | 11-7 | Kathi Lancaster | Rose Kopja / Elena Gordon | 2.6171 | +0.0151 | 2.6322 |
| 26 | 2026-08-27 | Loss | 6-11 | Rose Kopja | Elena Gordon / Kathi Lancaster | 2.6322 | -0.0028 | 2.6294 |
| 27 | 2026-08-27 | Win | 11-7 | Elena Gordon | Rose Kopja / Kathi Lancaster | 2.6294 | +0.0173 | 2.6467 |
| 28 | 2026-08-27 | Win | 11-9 | Kathi Lancaster | Rose Kopja / Elena Gordon | 2.6467 | +0.0142 | 2.6609 |
| 29 | 2026-09-03 | Loss | 8-11 | Debbie Chaffee | Renae Kray / Julia Krause | 2.6609 | -0.0027 | 2.6582 |
| 30 | 2026-09-03 | Loss | 4-11 | Nancy Krau | Julia Krause / Debbie Chaffee | 2.6582 | -0.0053 | 2.6529 |
| 31 | 2026-09-03 | Win | 11-3 | Julia Krause | Renae Kray / Nancy Krau | 2.6529 | +0.0146 | 2.6675 |
| 32 | 2026-09-03 | Win | 11-10 | Renae Kray | Debbie Chaffee / Nancy Krau | 2.6675 | +0.0125 | 2.6800 |
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 | 2.5347 | 2.8162 | -0.2815 | +0.0167 |
| 2 | 2.5676 | 2.5076 | -0.0599 | -0.0117 |
| 3 | 2.5066 | 2.7671 | +0.2605 | -0.0037 |
| 4 | 2.7292 | 2.5288 | +0.2005 | +0.0048 |
| 5 | 2.3931 | 2.0580 | +0.3351 | +0.0025 |
| 6 | 2.3904 | 2.2364 | +0.1540 | +0.0058 |
| 7 | 2.2947 | 2.0947 | +0.2000 | +0.0048 |
| 8 | 2.1537 | 2.3264 | -0.1727 | +0.0146 |
| 9 | 2.6266 | 2.6606 | -0.0340 | +0.0110 |
| 10 | 2.6123 | 2.6748 | -0.0625 | +0.0118 |
| 11 | 2.5895 | 2.7438 | -0.1544 | +0.0142 |
| 12 | 2.6480 | 2.6505 | +0.0026 | -0.0099 |
| 13 | 2.7187 | 3.0115 | -0.2927 | +0.0169 |
| 14 | 2.7136 | 3.0444 | +0.3308 | -0.0026 |
| 15 | 2.7327 | 3.0495 | +0.3169 | -0.0028 |
| 16 | 2.7377 | 3.0000 | -0.2623 | +0.0164 |
| 17 | 2.7155 | 2.9033 | +0.1877 | -0.0051 |
| 18 | 2.6818 | 2.9606 | -0.2788 | +0.0167 |
| 19 | 2.7206 | 2.8773 | +0.1567 | -0.0058 |
| 20 | 2.7021 | 2.8971 | -0.1950 | +0.0151 |
| 21 | 2.7524 | 2.9939 | +0.2415 | -0.0040 |
| 22 | 2.7378 | 2.9433 | +0.2055 | -0.0047 |
| 23 | 2.7438 | 2.9493 | +0.2055 | -0.0047 |
| 24 | 2.7143 | 3.0036 | +0.2893 | -0.0032 |
| 25 | 2.7968 | 2.9935 | -0.1968 | +0.0151 |
| 26 | 2.7383 | 3.0520 | +0.3138 | -0.0028 |
| 27 | 2.7340 | 3.0582 | -0.3242 | +0.0173 |
| 28 | 2.8177 | 2.9745 | -0.1569 | +0.0142 |
| 29 | 2.7183 | 3.0408 | +0.3224 | -0.0027 |
| 30 | 2.7323 | 2.9076 | +0.1753 | -0.0053 |
| 31 | 2.7714 | 2.9434 | -0.1720 | +0.0146 |
| 32 | 2.7765 | 2.8641 | -0.0876 | +0.0125 |
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 -0.2815 -> computed delta +0.0167; 2.5240 +0.0167 = 2.5407