Ben Rosenberg

Rating History

Singlehanded & Keelboat Ratings

DisciplineRating Rank RacesLast raced
Singlehanded2.44unranked (fewer than 10 races or not active)14Spring 2021
Keelboat1.40unranked (fewer than 10 races or not active)7Spring 2021

Team Race Rating

Rating Rank vs fleet rating Record
2.44 (fleet 3.39) unranked (fewer than 30 matches as skipper, or not active) −0.02 ± 0.17
about what the fleet rating predicts
as skipper 45–65 (41%)
SeasonRegattas Skipper W–LCrew W–L
Spring 2022215–22—
Fall 202127–12—
Spring 202136–14—
Spring 2020217–17—
1.71.81.922.12.22.32.4Spring 2020Spring 2021Fall 2021Spring 2022MIT FJ Team Racing Invite (2020-03-07): rating 1.89, fleet rating alone 1.89, offset +0.01; record 14-6 in this boatSouthern New England Team Race (2021-03-20): rating 1.86, fleet rating alone 1.83, offset +0.03; record 4-5 in this boatRobin Wallace Team Race (2021-03-27): rating 1.84, fleet rating alone 1.82, offset +0.02; record 1-4 in this boatBrown Team Race Invite (2021-04-24): rating 2.14, fleet rating alone 2.13, offset +0.01; record 1-5 in this boatLane Trophy Team Race (2021-10-24): rating 2.24, fleet rating alone 2.23, offset +0.00; record 5-5 in this boatDave Perry Team Race (2021-10-30): rating 2.24, fleet rating alone 2.25, offset -0.01; record 2-7 in this boatMcMerrick Cup Team Race (2022-03-05): rating 2.28, fleet rating alone 2.28, offset -0.00; record 15-6 in this boatJan T. Friis Team Race (2022-03-26): rating 2.29, fleet rating alone 2.29, offset +0.00; record 0-16 in this boatTeam race rating

Rating before each regatta driven (solid; dots green when the boat won 60% or more of its matches there, red under 40%) and what the fleet rating alone would give (dashed). The gap is the team race offset as it stood at the time. Hover a dot for the regatta; click to open it.

Team race surprisal: regatta by regatta

Over 9 graded regattas (110 matches) the record is 45–65 against 44.4 wins the pre-event forecasts expected (+0.6). 1 regatta clearly above the rating (P ≤ 20%), 3 clearly below (P ≥ 80%); 4 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2022-03-26Jan T. Friis Team Raceskipper2.81-0.190–160.9≤−3.001.3>99%
2022-03-05McMerrick Cup Team Raceskipper2.832.9715–614.5+0.140.150%
2021-10-30Dave Perry Team Raceskipper2.692.962–71.6+0.270.150%
2021-10-24Lane Trophy Team Raceskipper2.722.505–55.4−0.220.176%
2021-04-24Brown Team Race Inviteskipper2.582.311–51.2−0.280.077%
2021-03-27Robin Wallace Team Raceskipper2.301.161–42.0−1.140.894%
2021-03-20Southern New England Team Raceskipper2.231.814–54.6−0.430.282%
2020-03-07MIT FJ Team Racing Inviteskipper2.172.9014–611.6+0.721.315%
2020-02-29Hap Moore Trophyskipper1.902.103–112.6+0.200.151%

Regatta results

Regatta Role Div Races Avg Rating
Spring 2022 Team page Season
Spring Oberg Trophy Skipper A 16 4.4 3.74
Southern 5 Fleet Race/Ewenson Trophy Skipper A 11 5.2 1.76
McMerrick Cup Team Race Skipper TR 21 71% —
Jan T. Friis Team Race Skipper TR 16 0% —
George Morris Trophy Skipper A 10 6.8 3.38
Boston University Trophy Skipper B 14 2.9 3.94
Fall 2021 Team page Season
Lane Trophy Team Race Skipper TR 10 50% —
Hood Trophy Skipper A 10 6.7 3.62
The Hatch Brown Trophy Skipper C 5 9.2 3.44
The George Warren Smith Trophy Skipper A 14 5.1 4.13
Dave Perry Team Race Skipper TR 9 22% —
30th Captain Hurst Bowl Skipper C 14 9.2 2.92
Spring 2021 Team page Season
Southern New England Team Race Skipper TR 9 44% —
Robin Wallace Team Race Skipper TR 5 20% —
Robin Wallace Fleet Race Skipper A 5 10.2 2.66
Men's Open Singlehanded National Championship Singlehanded Skipper A 14 27.1 2.29
J70 Invite #3 Keelboat Skipper A 7 1.9 2.66
Camel invite Skipper B 9 7.0 0.91
Brown Team Race Invite Skipper TR 6 17% —
Spring 2020 Team page Season
MIT FJ Team Racing Invite Skipper TR 22 73% —
Hap Moore Trophy Skipper TR 14 21% —
Fall 2019 Team page Season
Nickerson Trophy Skipper A 8 7.6 2.87
Mt. Hope Invite Skipper B 7 5.0 2.96
Chuck Fontaine Invite Skipper B 8 3.8 1.74

From the notes

Short write-ups of what the ratings and results show, with the numbers and how they were computed.

All notes →