Arthur Libby

Rating History

Singlehanded & Keelboat Ratings

DisciplineRating Rank RacesLast raced
Singlehanded1.67unranked (fewer than 10 races or not active)12Fall 2016
Keelboat0.90unranked (fewer than 10 races or not active)1Fall 2015

Team Race Rating

Rating Rank vs fleet rating Record
1.58 (fleet 2.19) unranked (fewer than 30 matches as skipper, or not active) −0.00 ± 0.18
about what the fleet rating predicts
as skipper 22–68 (24%)
SeasonRegattas Skipper W–LCrew W–L
Spring 201731–24—
Spring 2014521–44—
1.51.7522.25Spring 2014Spring 2017Georgetown Team Race (2014-03-01): rating 2.25, fleet rating alone 2.26, offset -0.02; record 1-9 in this boatJohn Jackson Team Race Regatta (2014-03-08): rating 2.11, fleet rating alone 2.16, offset -0.05; record 0-14 in this boatGraham Hall Team Race (2014-03-15): rating 2.06, fleet rating alone 2.18, offset -0.12; record 1-7 in this boatGraham Hall Team Race (2014-03-15): rating 2.06, fleet rating alone 2.18, offset -0.12; record 3-4 in this boatAdmiral Moore Team Race (2014-03-22): rating 2.05, fleet rating alone 2.12, offset -0.08; record 4-3 in this boatAdmiral Moore Team Race (2014-03-22): rating 2.05, fleet rating alone 2.12, offset -0.08; record 8-6 in this boatJohn Jackson Memorial Team Race (2017-03-11): rating 1.65, fleet rating alone 1.66, offset -0.01; record 1-7 in this boatSouthern New England Team Race (2017-03-18): rating 1.65, fleet rating alone 1.68, offset -0.03; record 0-14 in this boatAdmiral Moore Team Race (2017-03-25): rating 1.64, fleet rating alone 1.68, offset -0.04; record 0-3 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 8 graded regattas (90 matches) the record is 22–68 against 18.6 wins the pre-event forecasts expected (+3.4). 2 regattas clearly above the rating (P ≤ 20%), 6 clearly below (P ≥ 80%); 23 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2017-03-25Admiral Moore Team Raceskipper2.26-0.740–30.1≤−3.000.1>99%
2017-03-18Southern New England Team Raceskipper2.15-0.850–140.4≤−3.000.6>99%
2017-03-11John Jackson Memorial Team Raceskipper1.961.331–71.6−0.630.385%
2014-03-22Admiral Moore Team Raceskipper2.574.5112–94.0+1.9412.1<1%
2014-03-15Graham Hall Team Raceskipper2.433.564–112.0+1.131.711%
2014-03-08John Jackson Team Race Regattaskipper2.65-0.350–143.4≤−3.006.8>99%
2014-03-01Georgetown Team Raceskipper2.280.981–92.4−1.301.296%
2014-02-22Pirates 3 on 3skipper2.230.964–14.7−1.270.796%

Regatta results

Regatta Role Div Races Avg Rating
Spring 2017 Team page Season
Southern New England Team Race Skipper TR 14 0% —
John Jackson Memorial Team Race Skipper TR 10 20% —
Admiral Moore Team Race Skipper TR 12 17% —
Fall 2016 Team page Season
War Memorial Backup Skipper A 2 17.5 -0.88
NY Maritime Fall Open Skipper A 13 9.0 1.96
MAISA North Qualifier Skipper B 4 6.8 1.60
Laser North Singlehanded Skipper A 12 9.2 1.32
Kings Point Dinghy Open Skipper B 12 9.4 2.40
Fall 2015 Team page Season
North Fall Qualifier Skipper A 3 8.3 1.53
MAISA Match Race Championship Keelboat Skipper A 1 4.0 —
Captain Hurst Bowl Skipper A 14 14.0 2.17
Fall 2014 Team page Season
NY Maritime Fall Open Skipper A 8 5.8 2.91
Navy Fall Skipper B 15 14.3 2.20
Moody Trophy Skipper A 10 12.6 2.39
Harry Anderson Jr. Trophy Skipper A 10 11.0 2.72
Spring 2014 Team page Season
Pirates 3 on 3 Skipper TR 5 80% —
Owen, Mosbacher and Knapp Trophies Skipper A 14 10.9 2.41
John Jackson Team Race Regatta Skipper TR 14 0% —
Graham Hall Team Race Skipper TR 15 27% —
Georgetown Team Race Skipper TR 10 10% —
America Trophy Skipper B 12 10.3 2.50
Admiral Moore Team Race Skipper TR 21 57% —
Admiral's Cup Skipper B 12 12.6 2.52
Fall 2013 Team page Season
War Memorial Crew B 5 8.4 —
North Fall 2 Skipper A 10 6.7 2.22
North Fall #1 Skipper B 13 4.8 2.30
Moody Skipper B 10 9.7 2.78
Maritime Fall Open Skipper A 6 4.8 3.00
Atlantic Coast Championships Crew A, B 2 18.0 —

From the notes

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

All notes →