Chapman Petersen

Rating History

Singlehanded & Keelboat Ratings

DisciplineRating Rank RacesLast raced
Singlehanded4.435 of 251104Fall 2024
Keelboat1.85unranked (fewer than 10 races or not active)2Fall 2024

Team Race Rating

Rating Rank vs fleet rating Record
3.26 (fleet 4.48) unranked (fewer than 30 matches as skipper, or not active) +0.01 ± 0.17
about what the fleet rating predicts
as skipper 70–16 (81%)
SeasonRegattas Skipper W–LCrew W–L
Spring 2025114–3—
Spring 2023456–13—
2.72.82.933.13.23.33.4Spring 2023Spring 2025Bob Bavier Open Team Race (2023-03-11): rating 2.90, fleet rating alone 2.90, offset +0.00; record 12-7 in this boatThe 40th Grey Lynne Marchiando Team Races (2023-04-01): rating 2.91, fleet rating alone 2.89, offset +0.02; record 2-2 in this boatThe 40th Grey Lynne Marchiando Team Races (2023-04-01): rating 2.91, fleet rating alone 2.89, offset +0.02; record 9-1 in this boatPCCSC Carter Ford Team Race Championship (2023-04-08): rating 2.86, fleet rating alone 2.84, offset +0.02; record 21-0 in this boatBob Bavier Open Team Race (2025-03-08): rating 3.29, fleet rating alone 3.27, offset +0.02; record 14-3 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 5 graded regattas (86 matches) the record is 70–16 against 67.6 wins the pre-event forecasts expected (+2.4). 0 regattas clearly above the rating (P ≤ 20%), 0 clearly below (P ≥ 80%); 1 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2025-03-08Bob Bavier Open Team Raceskipper3.704.0414–313.2+0.350.243%
2023-04-08PCCSC Carter Ford Team Race Championshipskipper3.336.3321–020.7≥+3.000.474%
2023-04-01The 40th Grey Lynne Marchiando Team Racesskipper3.383.4211–310.9+0.040.064%
2023-03-11Bob Bavier Open Team Raceskipper3.423.7312–710.9+0.300.238%
2023-02-25McIntyre Team Raceskipper3.393.5712–311.9+0.180.075%

Regatta results

Regatta Role Div Races Avg Rating
Spring 2025 Team page Season
Top-9 Invite Skipper A 7 4.9 2.46
Bob Bavier Open Team Race Skipper TR 21 86% —
Fall 2024 Team page Season
Top-9 Fall Invite Skipper A 7 2.9 3.59
PCCSC Open Singlehanded Championship Singlehanded Skipper A 10 1.1 6.98
PCCSC Richard Sweet Match Race Championship Keelboat Skipper A 1 1.0 —
ICSA Match Race National Championship Keelboat Skipper A 1 4.0 —
Glen S. Foster Trophy Singlehanded Skipper A 13 7.1 4.00
The 33rd Captain Hurst Bowl Skipper B 12 3.6 4.51
Spring 2023 Team page Season
PCCSC Carter Ford Team Race Championship Skipper TR 21 100% —
McIntyre Team Race Skipper TR 15 80% —
Bob Bavier Open Team Race Skipper TR 19 63% —
Admirals Cup Skipper A 10 10.9 3.71
The 40th Grey Lynne Marchiando Team Races Skipper TR 14 79% —
Fall 2022 Team page Season
Glen S. Foster Trophy Singlehanded Skipper A 14 4.6 4.96
PCCSC Open Singlehanded Championship Singlehanded Skipper A 9 1.1 6.47
2022 Truxtun Umsted Skipper A 10 5.6 4.21

Linked Profiles

League Name School Year
ISSA Chapman Petersen The Hotchkiss SchoolThe Hotchkiss School '22
ISSA Chapman Petersen Lake Forest High SchoolLake Forest High School '22

From the notes

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

All notes →