Zach Cooper

Rating History

Crew Rating

Career: 18.93 percentile of ICSA crews (limited evidence)

No season rating yet: needs 8+ crewed races in a season.

Singlehanded & Keelboat Ratings

DisciplineRating Rank RacesLast raced
Singlehanded1.29unranked (fewer than 10 races or not active)24Fall 2019

Team Race Rating

Rating Rank vs fleet rating Record
0.94 (fleet 1.55) unranked (fewer than 30 matches as skipper, or not active) −0.01 ± 0.18
about what the fleet rating predicts
as skipper 47–36 (57%)
SeasonRegattas Skipper W–LCrew W–L
Spring 2019316–11—
Spring 2018428–22—
Spring 201723–3—
0.80.911.11.2Spring 2017Spring 2018Spring 2019NWISA Team Race - JV (2017-05-06): rating 0.85, fleet rating alone 0.89, offset -0.03; record 3-1 in this boatNWISA Regional Team Race - Bainbridge (2018-03-24): rating 1.11, fleet rating alone 1.15, offset -0.04; record 0-1 in this boatNWISA Regional Team Race - Bainbridge (2018-03-24): rating 1.11, fleet rating alone 1.15, offset -0.04; record 1-0 in this boatNWISA Regional Team Race - Bainbridge (2018-03-24): rating 1.11, fleet rating alone 1.15, offset -0.04; record 3-2 in this boatOlympia Team Race Regatta (2018-04-07): rating 1.06, fleet rating alone 1.12, offset -0.06; record 0-3 in this boatOlympia Team Race Regatta (2018-04-07): rating 1.06, fleet rating alone 1.12, offset -0.06; record 7-6 in this boatNWISA Bellingham Team Race (2018-04-21): rating 1.09, fleet rating alone 1.15, offset -0.06; record 0-1 in this boatNWISA Bellingham Team Race (2018-04-21): rating 1.09, fleet rating alone 1.15, offset -0.06; record 1-2 in this boatNWISA Bellingham Team Race (2018-04-21): rating 1.09, fleet rating alone 1.15, offset -0.06; record 9-1 in this boatNWISA Team Race Championship (2018-05-05): rating 1.01, fleet rating alone 1.09, offset -0.08; record 7-6 in this boatOlympia Gold Team Race Regatta (2019-03-16): rating 0.95, fleet rating alone 1.02, offset -0.07; record 6-2 in this boatPortland Team Race (2019-04-06): rating 1.00, fleet rating alone 1.00, offset -0.00; record 4-4 in this boat2019 NWISA Team Race Championships (2019-04-27): rating 0.93, fleet rating alone 0.98, offset -0.05; record 0-1 in this boat2019 NWISA Team Race Championships (2019-04-27): rating 0.93, fleet rating alone 0.98, offset -0.05; record 6-4 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 (81 matches) the record is 47–34 against 47.6 wins the pre-event forecasts expected (−0.6). 1 regatta clearly above the rating (P ≤ 20%), 4 clearly below (P ≥ 80%); 7 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2019-04-272019 NWISA Team Race Championshipsskipper1.071.736–54.8+0.660.433%
2019-04-06Portland Team Raceskipper1.25-0.284–45.9−1.531.798%
2019-03-16Olympia Gold Team Race Regattaskipper1.153.516–22.9+2.363.92%
2018-05-05NWISA Team Race Championshipskipper1.230.657–68.1−0.580.385%
2018-04-21NWISA Bellingham Team Raceskipper1.280.8910–410.6−0.390.180%
2018-04-07Olympia Team Race Regattaskipper1.121.037–97.2−0.090.066%
2018-03-24NWISA Regional Team Race - Bainbridgeskipper1.090.044–35.0−1.050.692%
2017-05-06NWISA Team Race - JVskipper0.980.733–13.1−0.250.081%

Regatta results

Regatta Role Div Races Avg Rating
Fall 2019 Team page Season
NWISA Singlehanded Championship - Full Singlehanded Skipper A 16 2.2 0.77
Spring 2019 Team page Season
SSP Combined Division - GOLD Skipper A 7 18.1 -1.12
Portland Team Race Skipper TR 8 50% —
Olympia Gold Team Race Regatta Skipper TR 8 75% —
2019 NWISA Team Race Championships Skipper TR 12 58% —
Fall 2018 Team page Season
NWISA: South Regional, Olympia Skipper B 5 1.8 3.10
NWISA Fall Championships- Ranking Regatta #1 Skipper B 6 6.0 1.13
Cascadia Cup - GOLD Skipper A 5 12.2 -0.31
Spring 2018 Team page Season
SSP Combined Division - GOLD Skipper A 6 11.3 0.66
Port Townsend Open Skipper A 7 4.7 1.59
Olympia Team Race Regatta Skipper TR 18 50% —
NWISA Team Race Championship Skipper TR 13 54% —
NWISA Regional Team Race - Bainbridge Skipper TR 8 62% —
NWISA Fleet Race Championship Skipper A 2 11.0 0.73
NWISA Bellingham Team Race Skipper TR 14 71% —
ISLANDS CUP Crew A 6 9.3 —
Fall 2017 Team page Season
Olympia: Fall Ranking Championship, Silver Skipper A 5 2.4 2.64
NWISA Singlehand Champs - FULL Singlehanded Skipper A 8 4.2 0.27
NWISA Fall South Regional Skipper A 8 7.8 0.65
Cascadia Cup - GOLD Skipper B 6 8.3 0.38
Spring 2017 Team page Season
SSP Combined - SILVER Crew A 3 10.3 —
SSP Combined - GOLD Crew A, B 6 22.5 —
NWISA Team Race - JV Skipper TR 11 73% —
NWISA: Olympia South Regional Team Race Skipper TR 7 29% —
Kitsap 10% Regatta - JV Skipper B 6 2.0 3.04
JV Districts Orcas Skipper A 6 9.5 -0.53
Forrest Cook Regatta Skipper B 9 11.4 -1.08

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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