Initial VIPR
3.6060
Registry seed
Current VIPR
3.5288
After latest rated game
Net Movement
-0.0772
Current minus initial
Record
22-26
46% win rate · 48 rated games
Storyline
Sandy Zutter entered VIPR with an initial registry rating of 3.6060. Across 48 rated doubles games, the player went 22-26 and moved -0.0772, finishing at 3.5288.
Why It Moved
AI-generated explanation: The 22-26 record produced +0.1828 from wins and -0.2600 from losses, for a net move of -0.0772. The biggest single-game impact was -0.0162 against Kathy Battle as partner and Judy Arlington / Connie Nowell as opponents. In game #21 on 2026-09-10, VIPR expected the player's team to have the edge, so the loss carried a larger drop: player team 3.4191 vs opponent team 3.1669.
Partner Chemistry
Partnership patterns are starting to emerge.
Sandy's most common partner signals so far: Judy Arlington (4-1, 80%), Sharon McFarland (4-1, 80%), Diane McCarthy (1-2, 33%), Kathy Battle (1-2, 33%). No partnership has reached both the 8+ match and 75%+ win-rate marker yet, so treat this as directional.
Streaks & Rivalries
Rivalry
Sandy has faced Judy Arlington 11 times - record: 6-5. A close matchup worth watching.
Session Summary
| Date | W-L | Start | End | Net |
|---|---|---|---|---|
| 2026-07-02 | 2-2 | 3.6060 | 3.6073 | +0.0013 |
| 2026-08-13 | 2-2 | 3.6073 | 3.6010 | -0.0063 |
| 2026-08-20 | 2-2 | 3.6010 | 3.5978 | -0.0032 |
| 2026-08-27 | 0-4 | 3.5978 | 3.5593 | -0.0385 |
| 2026-09-03 | 2-2 | 3.5593 | 3.5511 | -0.0082 |
| 2026-09-10 | 2-2 | 3.5511 | 3.5443 | -0.0068 |
| 2026-09-17 | 2-2 | 3.5443 | 3.5386 | -0.0057 |
| 2026-10-01 | 3-1 | 3.5386 | 3.5544 | +0.0158 |
| 2026-10-13 | 3-1 | 3.5544 | 3.5585 | +0.0041 |
| 2026-10-15 | 1-3 | 3.5585 | 3.5379 | -0.0206 |
| 2026-10-20 | 0-4 | 3.5379 | 3.5141 | -0.0238 |
| 2026-10-22 | 3-1 | 3.5141 | 3.5288 | +0.0147 |
Game-By-Game Rating Trail
| # | Date | Result | Score | Partner | Opponents | Before | Change | After |
|---|---|---|---|---|---|---|---|---|
| 1 | 2026-07-02 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 6-11 | Michele Blanchard | Sue Reich / Erin DeFrates | 3.6060 | -0.0065 | 3.5995 |
| 2 | 2026-07-02 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-9 | Erin DeFrates | Michele Blanchard / Sharon McFarland | 3.5995 | +0.0068 | 3.6063 |
| 3 | 2026-07-02 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 3-11 | Sharon McFarland | Sue Reich / Michele Blanchard | 3.6063 | -0.0047 | 3.6016 |
| 4 | 2026-07-02 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-6 | Sue Reich | Erin DeFrates / Sharon McFarland | 3.6016 | +0.0057 | 3.6073 |
| 5 | 2026-08-13 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-6 | Nancy Alban | Gina M Park / Andrea Fairchild | 3.6073 | +0.0078 | 3.6151 |
| 6 | 2026-08-13 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-9 | Sharon McFarland | Gina M Park / Nancy Alban | 3.6151 | +0.0090 | 3.6241 |
| 7 | 2026-08-13 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 9-11 | Andrea Fairchild | Sharon McFarland / Nancy Alban | 3.6241 | -0.0101 | 3.6140 |
| 8 | 2026-08-13 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 10-11 | Gina M Park | Sharon McFarland / Andrea Fairchild | 3.6140 | -0.0130 | 3.6010 |
| 9 | 2026-08-20 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-1 | Sharon McFarland | Jolynne Colvin / Diane McCarthy | 3.6010 | +0.0117 | 3.6127 |
| 10 | 2026-08-20 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-1 | Gina M Park | Diane McCarthy / Sharon McFarland | 3.6127 | +0.0102 | 3.6229 |
| 11 | 2026-08-20 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 6-11 | Diane McCarthy | Jolynne Colvin / Gina M Park | 3.6229 | -0.0114 | 3.6115 |
| 12 | 2026-08-20 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 6-11 | Jolynne Colvin | Sharon McFarland / Gina M Park | 3.6115 | -0.0137 | 3.5978 |
| 13 | 2026-08-27 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 2-11 | Carolyn Roan | Lucille Gambescia / Laura Marchisello | 3.5978 | -0.0016 | 3.5962 |
| 14 | 2026-08-27 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 6-11 | Lucille Gambescia | Laura Marchisello / Carolyn Roan | 3.5962 | -0.0145 | 3.5817 |
| 15 | 2026-08-27 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 6-11 | Laura Marchisello | Lucille Gambescia / Carolyn Roan | 3.5817 | -0.0087 | 3.5730 |
| 16 | 2026-08-27 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 2-11 | Lucille Gambescia | Laura Marchisello / Carolyn Roan | 3.5730 | -0.0137 | 3.5593 |
| 17 | 2026-09-03 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 8-11 | Zeneida Toledo | Kathy Battle / Judy Arlington | 3.5593 | -0.0134 | 3.5459 |
| 18 | 2026-09-03 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 7-11 | Andrea Fairchild | Zeneida Toledo / Kathy Battle | 3.5459 | -0.0123 | 3.5336 |
| 19 | 2026-09-03 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-3 | Kathy Battle | Judy Arlington / Andrea Fairchild | 3.5336 | +0.0078 | 3.5414 |
| 20 | 2026-09-03 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-7 | Judy Arlington | Zeneida Toledo / Andrea Fairchild | 3.5414 | +0.0097 | 3.5511 |
| 21 | 2026-09-10 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 2-11 | Kathy Battle | Judy Arlington / Connie Nowell | 3.5511 | -0.0162 | 3.5349 |
| 22 | 2026-09-10 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-4 | Judy Arlington | Kathy Battle / Connie Nowell | 3.5349 | +0.0046 | 3.5395 |
| 23 | 2026-09-10 Thursday Ladies Ladder League - SUMMER 2026 |
Win | 11-8 | Connie Nowell | Kathy Battle / Judy Arlington | 3.5395 | +0.0127 | 3.5522 |
| 24 | 2026-09-10 Thursday Ladies Ladder League - SUMMER 2026 |
Loss | 4-11 | Connie Nowell | Kathy Battle / Judy Arlington | 3.5522 | -0.0079 | 3.5443 |
| 25 | 2026-09-17 Thursday Ladies Ladder League - Summer 2026 |
Win | 11-6 | Sharon McFarland | Stephanie Chen / Judy Arlington | 3.5443 | +0.0062 | 3.5505 |
| 26 | 2026-09-17 Thursday Ladies Ladder League - Summer 2026 |
Win | 11-7 | Zeneida Toledo | Sharon McFarland / Stephanie Chen | 3.5505 | +0.0110 | 3.5615 |
| 27 | 2026-09-17 Thursday Ladies Ladder League - Summer 2026 |
Loss | 3-11 | Stephanie Chen | Judy Arlington / Zeneida Toledo | 3.5615 | -0.0131 | 3.5484 |
| 28 | 2026-09-17 Thursday Ladies Ladder League - Summer 2026 |
Loss | 8-11 | Judy Arlington | Sharon McFarland / Zeneida Toledo | 3.5484 | -0.0098 | 3.5386 |
| 29 | 2026-10-01 Thursday Ladies Ladder League - Fall 2026 |
Loss | 7-11 | Karen Kellam | Diane McCarthy / Sharon McFarland | 3.5386 | -0.0096 | 3.5290 |
| 30 | 2026-10-01 Thursday Ladies Ladder League - Fall 2026 |
Win | 11-1 | Sharon McFarland | Karen Kellam / Judy Arlington | 3.5290 | +0.0066 | 3.5356 |
| 31 | 2026-10-01 Thursday Ladies Ladder League - Fall 2026 |
Win | 11-7 | Judy Arlington | Diane McCarthy / Karen Kellam | 3.5356 | +0.0126 | 3.5482 |
| 32 | 2026-10-01 Thursday Ladies Ladder League - Fall 2026 |
Win | 11-10 | Diane McCarthy | Sharon McFarland / Judy Arlington | 3.5482 | +0.0062 | 3.5544 |
| 33 | 2026-10-13 Santiago Club - Team 1 vs Team 2 |
Win | 21-12 | Mary Seifert | Ellen Huber / Cookie Sciacca | 3.5544 | +0.0017 | 3.5561 |
| 34 | 2026-10-13 Santiago Club - Team 1 vs Team 2 |
Loss | 21-23 | Tad Leffelman | Cookie Sciacca / David Koleda | 3.5561 | -0.0125 | 3.5436 |
| 35 | 2026-10-13 Santiago Club - Team 1 vs Team 2 |
Win | 21-18 | Kerry Ferrero | Cookie Sciacca / Kirstin Burri | 3.5436 | +0.0097 | 3.5533 |
| 36 | 2026-10-13 Santiago Club - Team 1 vs Team 2 |
Win | 21-15 | Greg Dodge | Cookie Sciacca / Bob Humphrey | 3.5533 | +0.0052 | 3.5585 |
| 37 | 2026-10-15 Thursday Ladies Ladder League - Fall 2026 |
Loss | 7-11 | Diane McCarthy | Cheri Kazee / Lori Linklater | 3.5585 | -0.0099 | 3.5486 |
| 38 | 2026-10-15 Thursday Ladies Ladder League - Fall 2026 |
Loss | 8-11 | Lori Linklater | Diane McCarthy / Suzie Dunn | 3.5486 | -0.0120 | 3.5366 |
| 39 | 2026-10-15 Thursday Ladies Ladder League - Fall 2026 |
Win | 11-3 | Suzie Dunn | Cheri Kazee / Diane McCarthy | 3.5366 | +0.0131 | 3.5497 |
| 40 | 2026-10-15 Thursday Ladies Ladder League - Fall 2026 |
Loss | 8-11 | Cheri Kazee | Lori Linklater / Suzie Dunn | 3.5497 | -0.0118 | 3.5379 |
| 41 | 2026-10-20 Santiago Club - Team 3 vs Team 1 |
Loss | 20-22 | Mary Seifert | Sue Dahl / Erin DeFrates | 3.5379 | -0.0083 | 3.5296 |
| 42 | 2026-10-20 Santiago Club - Team 3 vs Team 1 |
Loss | 10-21 | Kerry Ferrero | Erin DeFrates / Alejandra Bussey | 3.5296 | -0.0034 | 3.5262 |
| 43 | 2026-10-20 Santiago Club - Team 3 vs Team 1 |
Loss | 10-21 | Greg Dodge | Erin DeFrates / Doug Kellogg | 3.5262 | -0.0056 | 3.5206 |
| 44 | 2026-10-20 Santiago Club - Team 3 vs Team 1 |
Loss | 16-21 | Paul Randour | Erin DeFrates / Gene Konzen | 3.5206 | -0.0065 | 3.5141 |
| 45 | 2026-10-22 Thursday Ladies Ladder League - Fall 2026 |
Win | 11-4 | Suzie Dunn | Judy Arlington / Kathy Battle | 3.5141 | +0.0066 | 3.5207 |
| 46 | 2026-10-22 Thursday Ladies Ladder League - Fall 2026 |
Loss | 8-11 | Kathy Battle | Judy Arlington / Stephanie Chen | 3.5207 | -0.0098 | 3.5109 |
| 47 | 2026-10-22 Thursday Ladies Ladder League - Fall 2026 |
Win | 11-9 | Judy Arlington | Suzie Dunn / Stephanie Chen | 3.5109 | +0.0098 | 3.5207 |
| 48 | 2026-10-22 Thursday Ladies Ladder League - Fall 2026 |
Win | 11-3 | Stephanie Chen | Suzie Dunn / Kathy Battle | 3.5207 | +0.0081 | 3.5288 |
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 | 3.6153 | 3.7419 | +0.1266 | -0.0065 |
| 2 | 3.6286 | 3.5126 | +0.1160 | +0.0068 |
| 3 | 3.4949 | 3.7007 | +0.2058 | -0.0047 |
| 4 | 3.6809 | 3.5231 | +0.1578 | +0.0057 |
| 5 | 3.5006 | 3.4240 | +0.0766 | +0.0078 |
| 6 | 3.5011 | 3.4673 | +0.0337 | +0.0090 |
| 7 | 3.4599 | 3.4559 | -0.0040 | -0.0101 |
| 8 | 3.5128 | 3.4070 | -0.1058 | -0.0130 |
| 9 | 3.5193 | 3.5802 | -0.0609 | +0.0117 |
| 10 | 3.5033 | 3.5113 | -0.0080 | +0.0102 |
| 11 | 3.5626 | 3.5123 | -0.0503 | -0.0114 |
| 12 | 3.6171 | 3.4803 | -0.1368 | -0.0137 |
| 13 | 3.5298 | 3.9590 | +0.4291 | -0.0016 |
| 14 | 3.7763 | 3.6072 | -0.1691 | -0.0145 |
| 15 | 3.6694 | 3.7142 | +0.0448 | -0.0087 |
| 16 | 3.7583 | 3.6252 | -0.1332 | -0.0137 |
| 17 | 3.4271 | 3.3059 | -0.1211 | -0.0134 |
| 18 | 3.4305 | 3.3502 | -0.0804 | -0.0123 |
| 19 | 3.4084 | 3.3318 | +0.0766 | +0.0078 |
| 20 | 3.3781 | 3.3669 | +0.0112 | +0.0097 |
| 21 | 3.4191 | 3.1669 | -0.2522 | -0.0162 |
| 22 | 3.3943 | 3.1868 | +0.2075 | +0.0046 |
| 23 | 3.2415 | 3.3395 | -0.0980 | +0.0127 |
| 24 | 3.2542 | 3.3268 | +0.0726 | -0.0079 |
| 25 | 3.5073 | 3.3671 | +0.1402 | +0.0062 |
| 26 | 3.4175 | 3.4522 | -0.0347 | +0.0110 |
| 27 | 3.4605 | 3.3481 | -0.1124 | -0.0131 |
| 28 | 3.4103 | 3.4184 | +0.0081 | -0.0098 |
| 29 | 3.5116 | 3.5247 | +0.0131 | -0.0096 |
| 30 | 3.5212 | 3.3963 | +0.1249 | +0.0066 |
| 31 | 3.4138 | 3.5055 | -0.0917 | +0.0126 |
| 32 | 3.5555 | 3.4156 | +0.1399 | +0.0062 |
| 33 | 3.7127 | 3.3001 | +0.4126 | +0.0017 |
| 34 | 3.5744 | 3.4858 | -0.0886 | -0.0125 |
| 35 | 3.3133 | 3.3021 | +0.0112 | +0.0097 |
| 36 | 3.7173 | 3.5370 | +0.1803 | +0.0052 |
| 37 | 3.5645 | 3.5683 | +0.0038 | -0.0099 |
| 38 | 3.5547 | 3.4842 | -0.0705 | -0.0120 |
| 39 | 3.4772 | 3.5897 | -0.1125 | +0.0131 |
| 40 | 3.5584 | 3.4950 | -0.0634 | -0.0118 |
| 41 | 3.6986 | 3.7593 | +0.0607 | -0.0083 |
| 42 | 3.3106 | 3.5869 | +0.2764 | -0.0034 |
| 43 | 3.6998 | 3.8647 | +0.1649 | -0.0056 |
| 44 | 3.6826 | 3.8082 | +0.1256 | -0.0065 |
| 45 | 3.4879 | 3.3651 | +0.1229 | +0.0066 |
| 46 | 3.3941 | 3.4020 | +0.0080 | -0.0098 |
| 47 | 3.4415 | 3.4333 | +0.0082 | +0.0098 |
| 48 | 3.4464 | 3.3780 | +0.0684 | +0.0081 |
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; 3.6060 -0.0065 = 3.5995