Initial VIPR
2.0860
Registry seed
Current VIPR
2.1585
After latest rated game
Net Movement
+0.0725
Current minus initial
Record
11-21
34% win rate · 32 rated games
Storyline
Mark Gamrat entered VIPR with an initial registry rating of 2.0860. Across 32 rated doubles games, the player went 11-21 and moved +0.0725, finishing at 2.1585.
Why It Moved
AI-generated explanation: The record was below .500, but the rating rose because the 11 win(s) added +0.1241 against stronger situations while the 21 losses cost -0.0516. The biggest single-game impact was +0.0181 against James Russ as partner and John Jederlinic / Adrian Marchetti as opponents. In game #25 on 2026-10-01, the player's team was the lower-rated team, so the win carried a larger gain: player team 2.3872 vs opponent team 2.7831.
Partner Chemistry
One high-chemistry partnership stands out.
Mark's strongest repeated partnership is with James Russ (7-1, 88%). That pairing has reached the 8+ match and 75%+ win-rate marker in the current data.
Streaks & Rivalries
Rivalry
Mark has faced James Russ 14 times - record: 1-13. A tough matchup so far.
Session Summary
| Date | W-L | Start | End | Net |
|---|---|---|---|---|
| 2026-07-02 | 1-3 | 2.0860 | 2.0838 | -0.0022 |
| 2026-07-16 | 2-2 | 2.0838 | 2.0988 | +0.0150 |
| 2026-08-13 | 1-3 | 2.0988 | 2.0961 | -0.0027 |
| 2026-08-20 | 1-3 | 2.0961 | 2.1053 | +0.0092 |
| 2026-09-10 | 2-2 | 2.1053 | 2.1266 | +0.0213 |
| 2026-09-24 | 2-2 | 2.1266 | 2.1376 | +0.0110 |
| 2026-10-01 | 1-3 | 2.1376 | 2.1526 | +0.0150 |
| 2026-10-15 | 1-3 | 2.1526 | 2.1585 | +0.0059 |
Game-By-Game Rating Trail
| # | Date | Result | Score | Partner | Opponents | Before | Change | After |
|---|---|---|---|---|---|---|---|---|
| 1 | 2026-07-02 Thursday Men's Ladder League - Summer 2026 |
Loss | 2-11 | Louis Colella | Mike Cluck / James Russ | 2.0860 | -0.0002 | 2.0858 |
| 2 | 2026-07-02 Thursday Men's Ladder League - Summer 2026 |
Win | 11-1 | Ramon Jimenez | James Russ / Louis Colella | 2.0858 | +0.0106 | 2.0964 |
| 3 | 2026-07-02 Thursday Men's Ladder League - Summer 2026 |
Loss | 1-11 | James Russ | Mike Cluck / Ramon Jimenez | 2.0964 | -0.0007 | 2.0957 |
| 4 | 2026-07-02 Thursday Men's Ladder League - Summer 2026 |
Loss | 7-11 | Mike Cluck | Louis Colella / Ramon Jimenez | 2.0957 | -0.0119 | 2.0838 |
| 5 | 2026-07-16 Thursday Men's Ladder League - Summer 2026 |
Loss | 5-11 | Rick Ross | James Russ / Maurice Finnegan | 2.0838 | -0.0010 | 2.0828 |
| 6 | 2026-07-16 Thursday Men's Ladder League - Summer 2026 |
Win | 11-8 | Maurice Finnegan | Rick Ross / Louis Colella | 2.0828 | +0.0090 | 2.0918 |
| 7 | 2026-07-16 Thursday Men's Ladder League - Summer 2026 |
Loss | 6-11 | Louis Colella | James Russ / Rick Ross | 2.0918 | -0.0009 | 2.0909 |
| 8 | 2026-07-16 Thursday Men's Ladder League - Summer 2026 |
Win | 11-5 | James Russ | Maurice Finnegan / Louis Colella | 2.0909 | +0.0079 | 2.0988 |
| 9 | 2026-08-13 Thursday Men's Ladder League - Summer 2026 |
Loss | 4-11 | Randy DeVries | James Russ / Rick Ross | 2.0988 | -0.0020 | 2.0968 |
| 10 | 2026-08-13 Thursday Men's Ladder League - Summer 2026 |
Loss | 9-11 | Louis Colella | Rick Ross / Randy DeVries | 2.0968 | -0.0013 | 2.0955 |
| 11 | 2026-08-13 Thursday Men's Ladder League - Summer 2026 |
Loss | 6-11 | Rick Ross | James Russ / Louis Colella | 2.0955 | -0.0071 | 2.0884 |
| 12 | 2026-08-13 Thursday Men's Ladder League - Summer 2026 |
Win | 11-1 | James Russ | Randy DeVries / Louis Colella | 2.0884 | +0.0077 | 2.0961 |
| 13 | 2026-08-20 Thursday Men's Ladder League - Summer 2026 |
Loss | 8-11 | Rick Ross | James Russ / Ken Gallagher | 2.0961 | -0.0022 | 2.0939 |
| 14 | 2026-08-20 Thursday Men's Ladder League - Summer 2026 |
Loss | 6-11 | Roger Thurman | James Russ / Rick Ross | 2.0939 | -0.0029 | 2.0910 |
| 15 | 2026-08-20 Thursday Men's Ladder League - Summer 2026 |
Loss | 4-11 | Ken Gallagher | Roger Thurman / Rick Ross | 2.0910 | -0.0016 | 2.0894 |
| 16 | 2026-08-20 Thursday Men's Ladder League - Summer 2026 |
Win | 11-5 | James Russ | Roger Thurman / Ken Gallagher | 2.0894 | +0.0159 | 2.1053 |
| 17 | 2026-09-10 Thursday Men's Ladder League - Summer 2026 |
Loss | 6-11 | Ken Gallagher | James Russ / Rick Ross | 2.1053 | -0.0017 | 2.1036 |
| 18 | 2026-09-10 Thursday Men's Ladder League - Summer 2026 |
Loss | 9-11 | Rick Ross | James Russ / Ken Gallagher | 2.1036 | -0.0021 | 2.1015 |
| 19 | 2026-09-10 Thursday Men's Ladder League - Summer 2026 |
Win | 11-3 | James Russ | Rick Ross / Ken Gallagher | 2.1015 | +0.0129 | 2.1144 |
| 20 | 2026-09-10 Thursday Men's Ladder League - Summer 2026 |
Win | 11-9 | James Russ | Rick Ross / Ken Gallagher | 2.1144 | +0.0122 | 2.1266 |
| 21 | 2026-09-24 Thursday Men's Ladder League - Summer 2026 |
Loss | 6-11 | Ken Gallagher | James Russ / Rick Ross | 2.1266 | -0.0019 | 2.1247 |
| 22 | 2026-09-24 Thursday Men's Ladder League - Summer 2026 |
Win | 11-7 | Rick Ross | Ken Gallagher / Louis Colella | 2.1247 | +0.0089 | 2.1336 |
| 23 | 2026-09-24 Thursday Men's Ladder League - Summer 2026 |
Loss | 8-11 | Louis Colella | James Russ / Ken Gallagher | 2.1336 | -0.0011 | 2.1325 |
| 24 | 2026-09-24 Thursday Men's Ladder League - Summer 2026 |
Win | 11-4 | James Russ | Rick Ross / Louis Colella | 2.1325 | +0.0051 | 2.1376 |
| 25 | 2026-10-01 Thursday Men's Ladder League - Fall 2026 |
Win | 11-8 | James Russ | John Jederlinic / Adrian Marchetti | 2.1376 | +0.0181 | 2.1557 |
| 26 | 2026-10-01 Thursday Men's Ladder League - Fall 2026 |
Loss | 9-11 | Gabriel Coss | John Jederlinic / James Russ | 2.1557 | -0.0010 | 2.1547 |
| 27 | 2026-10-01 Thursday Men's Ladder League - Fall 2026 |
Loss | 1-11 | Adrian Marchetti | Gabriel Coss / James Russ | 2.1547 | -0.0005 | 2.1542 |
| 28 | 2026-10-01 Thursday Men's Ladder League - Fall 2026 |
Loss | 3-11 | John Jederlinic | Gabriel Coss / Adrian Marchetti | 2.1542 | -0.0016 | 2.1526 |
| 29 | 2026-10-15 Thursday Men's Ladder League - Fall 2026 |
Loss | 7-11 | Bruce Edwards | Michael Laffey / Ken Gallagher | 2.1526 | -0.0073 | 2.1453 |
| 30 | 2026-10-15 Thursday Men's Ladder League - Fall 2026 |
Loss | 8-11 | Ken Gallagher | Bruce Edwards / TOM WILSON | 2.1453 | -0.0008 | 2.1445 |
| 31 | 2026-10-15 Thursday Men's Ladder League - Fall 2026 |
Loss | 5-11 | TOM WILSON | Michael Laffey / Bruce Edwards | 2.1445 | -0.0018 | 2.1427 |
| 32 | 2026-10-15 Thursday Men's Ladder League - Fall 2026 |
Win | 11-8 | Michael Laffey | Ken Gallagher / TOM WILSON | 2.1427 | +0.0158 | 2.1585 |
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 | 2.0878 | 2.9363 | +0.8485 | -0.0002 |
| 2 | 2.3118 | 2.3316 | -0.0199 | +0.0106 |
| 3 | 2.3317 | 2.9074 | +0.5757 | -0.0007 |
| 4 | 2.3799 | 2.3119 | -0.0679 | -0.0119 |
| 5 | 2.2132 | 2.7198 | +0.5066 | -0.0010 |
| 6 | 2.2535 | 2.2186 | +0.0349 | +0.0090 |
| 7 | 2.0827 | 2.6198 | +0.5371 | -0.0009 |
| 8 | 2.3272 | 2.2540 | +0.0732 | +0.0079 |
| 9 | 2.2508 | 2.6332 | +0.3824 | -0.0020 |
| 10 | 2.0917 | 2.5496 | +0.4579 | -0.0013 |
| 11 | 2.2252 | 2.3283 | +0.1031 | -0.0071 |
| 12 | 2.3306 | 2.2481 | +0.0825 | +0.0077 |
| 13 | 2.2226 | 2.5825 | +0.3599 | -0.0022 |
| 14 | 2.3284 | 2.6335 | +0.3051 | -0.0029 |
| 15 | 2.1975 | 2.6248 | +0.4273 | -0.0016 |
| 16 | 2.3360 | 2.5734 | -0.2374 | +0.0159 |
| 17 | 2.2068 | 2.6235 | +0.4168 | -0.0017 |
| 18 | 2.2201 | 2.5902 | +0.3702 | -0.0021 |
| 19 | 2.3527 | 2.4576 | -0.1050 | +0.0129 |
| 20 | 2.3656 | 2.4447 | -0.0792 | +0.0122 |
| 21 | 2.2143 | 2.6053 | +0.3910 | -0.0019 |
| 22 | 2.2243 | 2.1855 | +0.0388 | +0.0089 |
| 23 | 2.0890 | 2.5761 | +0.4871 | -0.0011 |
| 24 | 2.3783 | 2.1901 | +0.1881 | +0.0051 |
| 25 | 2.3872 | 2.7831 | -0.3958 | +0.0181 |
| 26 | 2.3881 | 2.8941 | +0.5061 | -0.0010 |
| 27 | 2.3263 | 2.9472 | +0.6208 | -0.0005 |
| 28 | 2.3644 | 2.7873 | +0.4229 | -0.0016 |
| 29 | 2.3825 | 2.4798 | +0.0973 | -0.0073 |
| 30 | 2.2289 | 2.7744 | +0.5455 | -0.0008 |
| 31 | 2.3123 | 2.7128 | +0.4004 | -0.0018 |
| 32 | 2.2870 | 2.5156 | -0.2287 | +0.0158 |
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 +0.8485 -> computed delta -0.0002; 2.0860 -0.0002 = 2.0858