Kathryn Hammond — Analysis

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Performance rating answers one question for each skipper: holding every other skipper's rating fixed, which rating makes my actual race-by-race finishes least surprising? It is the maximum-likelihood rating under the same Plackett–Luce model that produces the power rankings (how accurate it is), with each opponent fixed at their rating from the last rated week before this event (2026-W38). Substitute skippers are scored only on the races they sailed, and races the boat did not finish (OCS, DNF and similar) are left out.

Percentile places a rating among the 1,943 ICSA skippers who were rated within the year before this event, so it reads as “better than X% of the skippers racing in this league right now”. The arrow shows where the sailor stood going in and where this performance would put them.

Surprise is how many bits more surprising the sailor's finishes were at their pre-event rating than at their performance rating (0 = exactly as expected). P(this good or better) simulates the regatta 3,000 times with the sailor at their pre-event rating against the actual fleet, and reports how often they would score this many points or fewer in the races they skippered. Races in one regatta are not independent, so each simulation also gives every skipper a good or bad regatta, form that drifts from race to race, and the speed of each boat the rotation puts them in (why). Low means an unusually good regatta, high means an unusually poor one. It deliberately ignores how rivals actually sailed, so it agrees with the performance rating rather than with the division finish, which also depends on everyone else's day. Ratings are shown on the rankings scale (model rating × 100). Only skippers are rated; crews are not part of the model.

  • n no rating before this event — the model's estimate from this week is used as the baseline.

Combined divisions  12 boats · 8 races

Fin Skipper School Races Rating
before
Perf.
rating
Δ Percentile
before → perf.
Surprise
(bits)
P(this good
or better)
Avg finish
actual / exp.
Rating
after
2 Zachary Brown '30 Texas A&M University at Galveston Sea Aggies A 8/8 160 238 +78 70th → 83rd 1.7 12% 2.1 / 3.8 224
3 Blake Polsen '29 Texas A&M University at Galveston Sea Aggies B 8/8 99 116 +17 59th → 62nd 0.1 42% 4.2 / 4.8 111
4 Lewis Forrest '29 Rice University Owls A 8/8 71 81 +10 54th → 56th 0.0 47% 5.0 / 5.2 70
4 Matthew Schloemer '29 Texas A&M University Aggies B 6/8 110n 94 -16 61st → 58th 0.1 46% 4.2 / 4.8 110
4 Zachary Aronson '27 Texas A&M University Aggies B 2/8 -30 -37 -6 35th → 33rd 0.0 63% 7.5 / 6.9 -28
6 Jack Riley '29 Texas A&M University Aggies A 6/8 151 158 +7 68th → 70th 0.0 81% 4.8 / 3.9 153
6 Ben Ratterree '29 Texas A&M University Aggies A 2/8 -133 33 +166 14th → 47th 2.2 17% 6.0 / 8.5 -127
7 Mark Carella '27 University of Texas Longhorns A 8/8 -37 -11 +26 33rd → 38th 0.3 51% 7.2 / 7.2 -37
8 Collin Wilson '30 Rice University Owls B 6/8 -2n -94 -92 40th → 22nd 2.7 76% 8.3 / 6.6 -2
8 Oliver Zhu '28 Rice University Owls B 2/8 13 -89 -102 43rd → 23rd 1.4 81% 8.0 / 6.0 12
9 Eric Li '29 University of Texas Longhorns B 6/8 -184 -219 -35 7th → 3rd 0.3 66% 10.2 / 9.5 -184
9 Matias Martin '27 University of Texas Longhorns B 2/8 229 133 -96 82nd → 65th 1.1 79% 4.0 / 3.1 226
11 Maxwell Walstien '30 University of Kansas Jayhawks A 6/8 -185n -157 +28 6th → 11th 0.2 53% 9.8 / 9.4 -185
11 Robert Scheer '27 University of Kansas Jayhawks A 2/8 -95 -281 -185 21st → 1st 2.9 95% 11.0 / 8.1 -97
12 Iris Miculek '28 University of Kansas Jayhawks B 6/8 -217 -310 -93 3rd → 1st 1.4 80% 11.2 / 10.1 -223
12 Keifer Yim '28 University of Kansas Jayhawks B 2/8 -106n -259 -153 20th → 1st 1.9 76% 10.0 / 8.0 -106