Arthur Do

Rating History

Singlehanded & Keelboat Ratings

DisciplineRating Rank RacesLast raced
Keelboat0.39unranked (fewer than 10 races or not active)8Spring 2025

Team Race Rating

Rating Rank vs fleet rating Record
0.57 (fleet 0.95) 196 of 231 −0.01 ± 0.17
about what the fleet rating predicts
as skipper 21–17 (55%)
SeasonRegattas Skipper W–LCrew W–L
Spring 2025213–11—
Spring 202428–6—
0.50.60.7Spring 2024Spring 2025NESSA Team Racing Tournament (Terk Trophy) (2024-05-18): rating 0.63, fleet rating alone 0.60, offset +0.04; record 1-4 in this boatNESSA Team Racing Tournament (Terk Trophy) (2025-05-03): rating 0.59, fleet rating alone 0.58, offset +0.00; record 8-6 in this boatMBL TR Tournament (2025-05-17): rating 0.64, fleet rating alone 0.61, offset +0.03; record 5-5 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 4 graded regattas (38 matches) the record is 21–17 against 20.4 wins the pre-event forecasts expected (+0.6). 1 regatta clearly above the rating (P ≤ 20%), 2 clearly below (P ≥ 80%); 7 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2025-05-17MBL TR Tournamentskipper0.96-0.315–57.2−1.271.697%
2025-05-03NESSA Team Racing Tournament (Terk Trophy)skipper0.841.508–66.5+0.660.627%
2024-05-18NESSA Team Racing Tournament (Terk Trophy)skipper0.86-1.201–42.5−2.061.798%
2024-05-11MBL Team Race Tournamentskipper0.602.477–24.1+1.872.95%

Regatta results

Regatta Role Div Races Avg Rating
Spring 2025 Team page Season
NESSA Team Racing Tournament (Terk Trophy) Skipper TR 14 57% —
NESSA O'Day Qualifier - Quincy Skipper B 4 6.2 1.04
Merc Gold - 2025 Zimba MBL Championship Skipper A 8 4.8 0.41
MBL TR Tournament Skipper TR 10 50% —
Courageous Sailing Keelboat Kickoff Keelboat Skipper A 4 6.5 0.62
Fall 2024 Team page Season
Tabor Fall Invite - 420 Skipper B 2 13.5 -0.36
Roy Williams Invitational Regatta Skipper B 5 9.2 1.13
Fall FunFest (Gleekman Trophy) Skipper B 2 15.5 -0.97
Casco Bay Open Skipper B 1 13.0 —
Spring 2024 Team page Season
Sharon Invitational Fleet Race Regatta Skipper B 6 5.3 1.40
NESSA Team Racing Tournament (Terk Trophy) Skipper TR 9 33% —
NESSA O'Day Qualifier - Quincy, MA Skipper A 4 5.8 0.65
Merc Silver - 2024 Zimba MBL Championship Skipper A 5 3.2 1.65
MBL Team Race Tournament Skipper TR 12 75% —
Mass States hosted by BU Skipper A 2 4.5 1.05
Keelboat Kickoff Keelboat Skipper A 4 7.0 0.77
Fall 2023 Team page Season
Roy Williams Invitational Regatta Skipper A 2 15.0 -1.15
NESSA Fall FunFest (Gleekman Trophy) Skipper A 4 5.8 1.71
Duxbury Bay Maritime School Fall Invitational Skipper A 5 11.2 -0.53
ARNOLD BROWN REGATTA Skipper B 2 6.5 0.49
Spring 2023 Team page Season
Sharon Invitational Skipper A 2 13.5 -0.65
MBL Freshman/Sophomore Regatta Skipper A 2 5.5 —

From the notes

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

All notes →

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