ICSA Match Race National Championship

# SchoolTeam A TOT
1 Boston College Boston College Eagles 1 1
2 University of Pennsylvania University of Pennsylvania Quakers 2 2
3 Stanford University Stanford University Cardinal 3 3
4 SUNY Maritime College SUNY Maritime College Privateers 4 4
5 College of Charleston College of Charleston Cougars 5 5
6 Jacksonville University Jacksonville University Fins 6 6
7 Dartmouth College Dartmouth College Big Green 7 7
8 University of Wisconsin University of Wisconsin Badgers 8 8
9 University of Washington University of Washington Huskies 9 9
10 Texas A&M University at Galveston Texas A&M University at Galveston Aggies 10 10
SchoolTeam R1 TOT
Boston College Boston College Eagles 1 1
University of Pennsylvania University of Pennsylvania Quakers 2 2
Stanford University Stanford University Cardinal 3 3
SUNY Maritime College SUNY Maritime College Privateers 4 4
College of Charleston College of Charleston Cougars 5 5
Jacksonville University Jacksonville University Fins 6 6
Dartmouth College Dartmouth College Big Green 7 7
University of Wisconsin University of Wisconsin Badgers 8 8
University of Washington University of Washington Huskies 9 9
Texas A&M University at Galveston Texas A&M University at Galveston Aggies 10 10

Performance rating asks, for each skipper: holding every other boat fixed, which rating makes my actual race-by-race finishes least surprising? Boats are valued with the keelboat rating rather than the fleet rating: 0.41 × the skipper's fleet rating from the week before the event (unrated skippers start at 0.47); 0.28 × the mean fleet rating of the rated crew aboard; the skipper's own keelboat offset; the school's program effect. Non-finishes (OCS, DNF and similar) are left out of the fitting, as in the rating model.

Percentile places a rating among the 207 ICSA sailors with a keelboat rating who raced the discipline in the last three seasons. Surprise is how many bits more surprising the finishes were at the pre-event rating than at the performance rating. P(this good or better) simulates the event 3,000 times at the pre-event ratings, with the same regatta-form model as the fleet analysis pages, and reports how often the skipper would score this many points or fewer in the races they sailed.

The keelboat offsets are the current ones (the discipline files keep no weekly history), so a skipper's own offset has already seen this event; offsets are shrunk hard, so the effect is a few hundredths at most. Only skippers are rated.

  • u no fleet rating — the model's level for unrated skippers is the baseline.
  • — in the performance column: last in every race sailed, so no finite least-surprisal rating exists.

Division A  10 boats · 1 races

FinSkipperSchool Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
1Wade Waddell '19Boston College1/12.897.00++4.1199th → 99th2.416%1.0 / 4.2
2Porter Killian '22University of Pennsylvania1/11.06u4.51+3.4576th → 99th3.16%2.0 / 7.3
3Jack Parkin '21Stanford University1/12.823.59+0.7899th → 99th0.343%3.0 / 4.3
4Kyle Comerford '19SUNY Maritime College1/11.973.22+1.2599th → 99th0.735%4.0 / 5.7
5William Curtiss '20College of Charleston1/12.802.70−0.1099th → 99th0.068%5.0 / 4.3
6Alfonso Garcia Bringas '21Jacksonville University1/12.552.38−0.1799th → 99th0.070%6.0 / 4.8
7Cole Harris '22Dartmouth College1/12.791.83−0.9699th → 97th0.786%7.0 / 4.3
8Douglas Wake '22University of Wisconsin1/11.811.54−0.2796th → 91st0.078%8.0 / 6.0
9Connor Hughes '19University of Washington1/11.310.95−0.3686th → 72nd0.182%9.0 / 6.9
10Jonathan Sager '20Texas A&M University at Galveston1/11.14——78th → —1.8>99%10.0 / 7.2

Conditions — 11/16/2018 (8am–6pm)

☀️Clear sky
Humidity 37%  ·  Pressure 1015.7 hPa

Temperature

62°F
↑ 70°F   ↓ 52°F
Feels like 57°F

Wind

● from   ▲ toward
2.1 kn
avg  ·  max 2.9 kn
Gusts to 9.7 kn
From N (2°)

Sky & Precipitation

Cloud cover2% Sunshine9.9 hrs Humidity37% Pressure1015.7 hPa

What this breeze does at Stanford — from fleet racing

Breeze: N about 5 kn (weather reanalysis in the scorer’s units)
In fleet races at Stanford in this breeze: a strongly favourites’ day (+0.14)
Favourites’ conditions: in fleet racing here the results follow the ratings more closely than usual, and the top seeds hold their places.

Orderliness is how tightly a fleet race’s finishing order follows the pre-regatta ratings, relative to a typical event (0): positive is the favourites’ day, negative the underdogs’. A value of ±0.14 means a rating gap counts about 12% more than on a typical day. This event is not a fleet race the rating model scores, so there is no actual value for it: this is what this venue’s fleet racing history says about the breeze on the day, read off the chart at the star. How this is estimated · compare venues.

Orderliness beyond the fleet at Stanford by wind direction (angle) and speed (rings), fitted surface; dots are labelled regatta-days, ★ this regatta (48 labelled fleet-race days at Stanford).

From the notes

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

All notes →