Initial VIPR
3.4620
Registry seed
Current VIPR
3.5016
After latest rated game
Net Movement
+0.0396
Current minus initial
Record
16-16
50% win rate · 32 rated games
Storyline
Sharon McFarland entered VIPR with an initial registry rating of 3.4620. Across 32 rated doubles games, the player went 16-16 and moved +0.0396, finishing at 3.5016.
Why It Moved
AI-generated explanation: The 16-16 record produced +0.1694 from wins and -0.1298 from losses, for a net move of +0.0396. The biggest single-game impact was +0.0173 against Jean Narod as partner and Laura Marchisello / Jolynne Colvin as opponents. In game #15 on 2026-07-23, the player's team was the lower-rated team, so the win carried a larger gain: player team 3.4169 vs opponent team 3.7403.
Partner Chemistry
Partnership patterns are starting to emerge.
Sharon's most common partner signals so far: Gina M Park (3-1, 75%), Jolynne Colvin (2-2, 50%), Sandy Zutter (2-1, 67%), Carolyn Roan (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
Sharon has faced Jolynne Colvin 8 times - record: 4-4. A close matchup worth watching.
Session Summary
| Date | W-L | Start | End | Net |
|---|---|---|---|---|
| 2026-07-02 | 0-4 | 3.4620 | 3.4367 | -0.0253 |
| 2026-07-09 | 1-3 | 3.4367 | 3.4221 | -0.0146 |
| 2026-07-16 | 1-3 | 3.4221 | 3.4097 | -0.0124 |
| 2026-07-23 | 3-1 | 3.4097 | 3.4430 | +0.0333 |
| 2026-08-13 | 4-0 | 3.4430 | 3.4843 | +0.0413 |
| 2026-08-20 | 2-2 | 3.4843 | 3.4886 | +0.0043 |
| 2026-08-27 | 3-1 | 3.4886 | 3.4988 | +0.0102 |
| 2026-09-03 | 2-2 | 3.4988 | 3.5016 | +0.0028 |
Game-By-Game Rating Trail
| # | Date | Result | Score | Partner | Opponents | Before | Change | After |
|---|---|---|---|---|---|---|---|---|
| 1 | 2026-07-02 | Loss | 9-11 | Michele Blanchard | Erin DeFrates / Sandy Zutter | 3.4620 | -0.0068 | 3.4552 |
| 2 | 2026-07-02 | Loss | 7-11 | Sue Reich | Erin DeFrates / Michele Blanchard | 3.4552 | -0.0081 | 3.4471 |
| 3 | 2026-07-02 | Loss | 3-11 | Sandy Zutter | Sue Reich / Michele Blanchard | 3.4471 | -0.0047 | 3.4424 |
| 4 | 2026-07-02 | Loss | 6-11 | Erin DeFrates | Sue Reich / Sandy Zutter | 3.4424 | -0.0057 | 3.4367 |
| 5 | 2026-07-09 | Loss | 4-11 | Christine Ressler | Jolynne Colvin / Sally Musser | 3.4367 | -0.0061 | 3.4306 |
| 6 | 2026-07-09 | Loss | 5-11 | Carolyn Roan | Sally Musser / Christine Ressler | 3.4306 | -0.0079 | 3.4227 |
| 7 | 2026-07-09 | Loss | 10-11 | Sally Musser | Jolynne Colvin / Carolyn Roan | 3.4227 | -0.0093 | 3.4134 |
| 8 | 2026-07-09 | Win | 11-10 | Jolynne Colvin | Christine Ressler / Carolyn Roan | 3.4134 | +0.0087 | 3.4221 |
| 9 | 2026-07-16 | Loss | 6-11 | Carolyn Roan | Jolynne Colvin / Nancy Pierce | 3.4221 | -0.0042 | 3.4179 |
| 10 | 2026-07-16 | Loss | 8-11 | Stephanie Chen | Nancy Pierce / Carolyn Roan | 3.4179 | -0.0081 | 3.4098 |
| 11 | 2026-07-16 | Loss | 6-11 | Nancy Pierce | Jolynne Colvin / Stephanie Chen | 3.4098 | -0.0090 | 3.4008 |
| 12 | 2026-07-16 | Win | 11-4 | Jolynne Colvin | Carolyn Roan / Stephanie Chen | 3.4008 | +0.0089 | 3.4097 |
| 13 | 2026-07-23 | Loss | 4-11 | Jolynne Colvin | Erin DeFrates / Jean Narod | 3.4097 | -0.0098 | 3.3999 |
| 14 | 2026-07-23 | Win | 11-5 | Laura Marchisello | Erin DeFrates / Jolynne Colvin | 3.3999 | +0.0141 | 3.4140 |
| 15 | 2026-07-23 | Win | 11-9 | Jean Narod | Laura Marchisello / Jolynne Colvin | 3.4140 | +0.0173 | 3.4313 |
| 16 | 2026-07-23 | Win | 11-5 | Erin DeFrates | Laura Marchisello / Jean Narod | 3.4313 | +0.0117 | 3.4430 |
| 17 | 2026-08-13 | Win | 11-8 | Gina M Park | Nancy Alban / Andrea Fairchild | 3.4430 | +0.0092 | 3.4522 |
| 18 | 2026-08-13 | Win | 11-9 | Sandy Zutter | Gina M Park / Nancy Alban | 3.4522 | +0.0090 | 3.4612 |
| 19 | 2026-08-13 | Win | 11-9 | Nancy Alban | Andrea Fairchild / Sandy Zutter | 3.4612 | +0.0101 | 3.4713 |
| 20 | 2026-08-13 | Win | 11-10 | Andrea Fairchild | Gina M Park / Sandy Zutter | 3.4713 | +0.0130 | 3.4843 |
| 21 | 2026-08-20 | Win | 11-1 | Sandy Zutter | Jolynne Colvin / Diane McCarthy | 3.4843 | +0.0117 | 3.4960 |
| 22 | 2026-08-20 | Loss | 1-11 | Diane McCarthy | Sandy Zutter / Gina M Park | 3.4960 | -0.0102 | 3.4858 |
| 23 | 2026-08-20 | Win | 11-6 | Gina M Park | Jolynne Colvin / Sandy Zutter | 3.4858 | +0.0137 | 3.4995 |
| 24 | 2026-08-20 | Loss | 8-11 | Jolynne Colvin | Diane McCarthy / Gina M Park | 3.4995 | -0.0109 | 3.4886 |
| 25 | 2026-08-27 | Loss | 5-11 | Brenda Leardi | Amy Huckaby / Zeneida Toledo | 3.4886 | -0.0097 | 3.4789 |
| 26 | 2026-08-27 | Win | 11-0 | Amy Huckaby | Brenda Leardi / Zeneida Toledo | 3.4789 | +0.0072 | 3.4861 |
| 27 | 2026-08-27 | Win | 11-10 | Zeneida Toledo | Brenda Leardi / Amy Huckaby | 3.4861 | +0.0065 | 3.4926 |
| 28 | 2026-08-27 | Win | 11-7 | Zeneida Toledo | Brenda Leardi / Amy Huckaby | 3.4926 | +0.0062 | 3.4988 |
| 29 | 2026-09-03 | Win | 11-7 | Gina M Park | Carolyn Roan / Sally Musser | 3.4988 | +0.0114 | 3.5102 |
| 30 | 2026-09-03 | Loss | 2-11 | Sally Musser | Carolyn Roan / Gina M Park | 3.5102 | -0.0103 | 3.4999 |
| 31 | 2026-09-03 | Win | 11-6 | Carolyn Roan | Sally Musser / Gina M Park | 3.4999 | +0.0107 | 3.5106 |
| 32 | 2026-09-03 | Loss | 4-11 | Gina M Park | Carolyn Roan / Sally Musser | 3.5106 | -0.0090 | 3.5016 |
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 | 3.5126 | 3.6286 | +0.1160 | -0.0068 |
| 2 | 3.5795 | 3.6476 | +0.0681 | -0.0081 |
| 3 | 3.4949 | 3.7007 | +0.2058 | -0.0047 |
| 4 | 3.5231 | 3.6809 | +0.1578 | -0.0057 |
| 5 | 3.4497 | 3.5919 | +0.1422 | -0.0061 |
| 6 | 3.4304 | 3.5028 | +0.0724 | -0.0079 |
| 7 | 3.4693 | 3.4946 | +0.0253 | -0.0093 |
| 8 | 3.4911 | 3.4467 | +0.0444 | +0.0087 |
| 9 | 3.4260 | 3.6578 | +0.2319 | -0.0042 |
| 10 | 3.4314 | 3.4987 | +0.0673 | -0.0081 |
| 11 | 3.4865 | 3.5204 | +0.0340 | -0.0090 |
| 12 | 3.4852 | 3.4464 | +0.0388 | +0.0089 |
| 13 | 3.4961 | 3.5026 | +0.0065 | -0.0098 |
| 14 | 3.5444 | 3.6972 | -0.1529 | +0.0141 |
| 15 | 3.4169 | 3.7403 | -0.3234 | +0.0173 |
| 16 | 3.5135 | 3.5722 | -0.0587 | +0.0117 |
| 17 | 3.4532 | 3.4238 | +0.0294 | +0.0092 |
| 18 | 3.5011 | 3.4673 | +0.0337 | +0.0090 |
| 19 | 3.4559 | 3.4599 | -0.0040 | +0.0101 |
| 20 | 3.4070 | 3.5128 | -0.1058 | +0.0130 |
| 21 | 3.5193 | 3.5802 | -0.0609 | +0.0117 |
| 22 | 3.5113 | 3.5033 | -0.0080 | -0.0102 |
| 23 | 3.4803 | 3.6171 | -0.1368 | +0.0137 |
| 24 | 3.5346 | 3.5018 | -0.0329 | -0.0109 |
| 25 | 3.3245 | 3.3358 | +0.0114 | -0.0097 |
| 26 | 3.3797 | 3.2806 | +0.0992 | +0.0072 |
| 27 | 3.3962 | 3.2694 | +0.1269 | +0.0065 |
| 28 | 3.4027 | 3.2629 | +0.1399 | +0.0062 |
| 29 | 3.4999 | 3.5492 | -0.0493 | +0.0114 |
| 30 | 3.5278 | 3.5172 | -0.0106 | -0.0103 |
| 31 | 3.5104 | 3.5345 | -0.0241 | +0.0107 |
| 32 | 3.5115 | 3.5462 | +0.0347 | -0.0090 |
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 +0.1160 -> computed delta -0.0068; 3.4620 -0.0068 = 3.4552