| # | School | Team | Rec. | |
|---|---|---|---|---|
| 1 | New Trier HS | Trevian | 14–2 | |
| 2 | Hinsdale Central High School | Red Devils | 13–3 | |
| 3 | Latin School of Chicago | Romans | 13–3 | |
| 4 | Walter Payton College Preparatory High School | Grizzlies | 9–7 | |
| 5 | St. Ignatius College Prep, Chicago, IL | Wolfpack | 8–8 | |
| 6 | Lake Forest High School | Scouts | 8–8 | |
| 7 | Lane Tech College Prep | Varsity | 4–7 | |
| 8 | Fenwick High School | Friars | 4–7 | |
| 9 | University of Chicago Laboratory Schools | Maroons | 2–9 | |
| 10 | Beacon Academy | Wolves | 2–9 | |
| 11 | Loyola Academy | Ramblers | 2–9 | |
| 12 | Evanston Township HS | Wildkits | 2–9 |
Each side is the sum of its three boats (the skipper's fleet rating times 0.72 plus a team race offset learned from their past matches, plus the crew's offset and a small experience term) plus the school's team race strength and a home-water edge for the host. The win probability is a logistic function of the difference. The forecast was made before the event: the model was refitted on every match sailed before the first day, with fleet ratings as of the week before.
Fitted on the 4,364 team race matches sailed before 2018-04-21, using the line-ups that actually raced. It called 58 of 73 matches (80%) with a log-loss of 0.507 (a coin flip scores 0.693), so the event went about as expected for the forecast. Orderliness +0.37 ± 0.31: an orderly event, more orderly than 68% of high school team race events (temperature of the forecast log-odds that best fits the results, relative to the league average; nothing about the field, venue or wind predicts it, see the Weather tab). vs forecast is a team's wins minus the wins the model expected from the matches it sailed: positive means it beat its rating.
For each side, the performance strength is the value that would have made its record least surprising: the strength at which the model's expected wins over exactly these opponents equal the actual wins, with every opponent fixed at its pre-event strength. For a skipper, the same shift is applied only to their boat in the matches they sailed, with team-mates and opponents fixed; team-mates who sailed every match together therefore get the same number. Surprise is in bits: -log2 of the probability of the record at the pre-event strength minus the same at the performance strength. P(this good or better) treats matches as independent coin flips at the model's pre-event probabilities, so it ignores form within the day; read it as a rough guide.
Pre-event strength against the strength that would have made each record least surprising, everything else fixed. Δ is in the model's logit units, the same scale as the boat values above (a side is three boats plus the school term); green is a clear over-performance, red a clear under-performance. Skippers need three or more matches.
| Place | School | Strength | Perf. | Record | Exp. wins | Δ | Surprise (bits) | P(this good or better) |
|---|---|---|---|---|---|---|---|---|
| 2 | Hinsdale Central High School | 3.06 | 5.28 | 12–3 | 7.0 | +2.22 | 5.9 | 1% |
| 1 | New Trier HS | 4.26 | 5.75 | 13–2 | 10.4 | +1.49 | 2.0 | 10% |
| 7 | Lane Tech College Prep | 2.84 | 3.12 | 4–3 | 3.6 | +0.28 | 0.1 | 54% |
| 4 | Walter Payton College Preparatory High School | 3.44 | 3.59 | 9–7 | 8.6 | +0.15 | 0.0 | 52% |
| 3 | Latin School of Chicago | 4.84 | 4.94 | 12–3 | 11.8 | +0.10 | 0.0 | 60% |
| 5 | St. Ignatius College Prep, Chicago, IL | 3.02 | 3.06 | 7–8 | 6.9 | +0.04 | 0.0 | 59% |
| 8 | Fenwick High School | 1.84 | 1.79 | 3–7 | 3.1 | −0.04 | 0.0 | 65% |
| 10 | Beacon Academy | 1.58 | 1.19 | 2–8 | 2.5 | −0.39 | 0.1 | 77% |
| 6 | Lake Forest High School | 3.67 | 3.14 | 8–8 | 9.5 | −0.53 | 0.4 | 86% |
| 11 | Loyola Academy | 1.57 | -0.07 | 1–9 | 2.7 | −1.65 | 1.4 | 96% |
| 9 | University of Chicago Laboratory Schools | 2.56 | 0.86 | 1–6 | 2.5 | −1.70 | 1.3 | 96% |
| 12 | Evanston Township HS | 2.64 | -0.24 | 1–9 | 4.5 | −2.88 | 4.9 | >99% |
Probability the model gave the side that went on to win. Red bars are upsets (the winner was given under 50%).
| # | Winner | Loser | Pos. | ||||
|---|---|---|---|---|---|---|---|
| 1 | Wolves | 1-2-6 | def. | Wildkits | 3-4-5 | ||
| 2 | Romans | 1-3-4 | def. | Ramblers | 2-5-6 | ||
| 3 | Scouts | 1-3-4 | def. | Friars | 2-5-6 | ||
| 4 | Trevian | 1-2-5 | def. | Maroons | 3-4-6 | ||
| 5 | Red Devils | 2-3-4 | def. | Varsity | 1-5-6 | ||
| 6 | Grizzlies | 2-3-5 | def. | Wolfpack | 1-4-6 | ||
| 7 | Friars | 1-2-4 | def. | Wolves | 3-5-6 | ||
| 8 | Trevian | 1-2-6 | def. | Romans | 3-4-5 | ||
| 9 | Scouts | 1-3-6 | def. | Wildkits | 2-4-5 | ||
| 10 | Maroons | 2-3-4 | def. | Ramblers | 1-5-6 | ||
| 11 | Varsity | 1-2-6 | def. | Wolves | 3-4-5 | ||
| 12 | Romans | 1-2-3 | def. | Grizzlies | 4-5-6 | ||
| 13 | Red Devils | 1-2-4 | def. | Friars | 3-5-6 | ||
| 14 | Trevian | 1-2-4 | def. | Wolfpack | 3-5-6 | ||
| 15 | Wildkits | 1-2-3 | def. | Varsity | 4-5-6 | ||
| 16 | Grizzlies | 1-2-5 | def. | Ramblers | 3-4-6 | ||
| 17 | Scouts | 1-2-3 | def. | Wolves | 4-5-6 | ||
| 18 | Romans | 1-2-3 | def. | Maroons | 4-5-6 | ||
| 19 | Red Devils | 1-2-3 | def. | Wildkits | 4-5-6 | ||
| 20 | Wolfpack | 1-4-5 | def. | Ramblers | 2-3-6 | ||
| 21 | Varsity | 1-4-5 | def. | Friars | 2-3-6 | ||
| 22 | Trevian | 1-3-6 | def. | Grizzlies | 2-4-5 | ||
| 23 | Red Devils | 1-3-6 | def. | Scouts | 2-4-5 | ||
| 24 | Wolfpack | 2-3-4 | def. | Maroons | 1-5-6 | ||
| 25 | Friars | 1-2-4 | def. | Wildkits | 3-5-6 | ||
| 26 | Trevian | 1-2-3 | def. | Ramblers | 4-5-6 | ||
| 27 | Red Devils | 1-2-3 | def. | Wolves | 4-5-6 | ||
| 28 | Romans | 1-2-3 | def. | Wolfpack | 4-5-6 | ||
| 29 | Scouts | 1-2-5 | def. | Varsity | 3-4-6 | ||
| 30 | Grizzlies | 1-3-6 | def. | Maroons | 2-4-5 | ||
| 31 | Trevian | 1-2-3 | def. | Wolves | 4-5-6 | ||
| 32 | Ramblers | 2-3-4 | def. | Wildkits | 1-5-6 | ||
| 33 | Romans | 2-3-4 | def. | Friars | 1-5-6 | ||
| 34 | Red Devils | 1-2-5 | def. | Wolfpack | 3-4-6 | ||
| 35 | Scouts | 1-2-4 | def. | Maroons | 3-5-6 | ||
| 36 | Varsity | 1-2-5 | def. | Grizzlies | 3-4-6 | ||
| 37 | Trevian | 1-2-5 | def. | Wildkits | 3-4-6 | ||
| 38 | Romans | 1-2-6 | def. | Wolves | 3-4-5 | ||
| 39 | Red Devils | 1-2-3 | def. | Ramblers | 4-5-6 | ||
| 40 | Grizzlies | 2-3-4 | def. | Friars | 1-5-6 | ||
| 41 | Varsity | 1-2-4 | def. | Maroons | 3-5-6 | ||
| 42 | Wolfpack | 1-4-5 | def. | Scouts | 2-3-6 | ||
| 43 | Wolves | 1-2-6 | def. | Ramblers | 3-4-5 | ||
| 44 | Romans | 1-3-5 | def. | Red Devils | 2-4-6 | ||
| 45 | Grizzlies | 1-3-4 | def. | Wildkits | 2-5-6 | ||
| 46 | Friars | 1-3-6 | def. | Maroons | 2-4-5 | ||
| 47 | Trevian | 1-2-5 | def. | Scouts | 3-4-6 | ||
| 48 | Wolfpack | 1-2-4 | def. | Varsity | 3-5-6 | ||
| 49 | Grizzlies | 1-2-6 | def. | Red Devils | 3-4-5 | ||
| 50 | Maroons | 1-2-3 | def. | Wolves | 4-5-6 | ||
| 51 | Friars | 1-2-6 | def. | Ramblers | 3-4-5 | ||
| 52 | Romans | 1-3-4 | def. | Wildkits | 2-5-6 | ||
| 53 | Trevian | 1-2-4 | def. | Varsity | 3-5-6 | ||
| 54 | Grizzlies | 1-3-6 | def. | Scouts | 2-4-5 | ||
| 55 | Wolfpack | 1-2-3 | def. | Wolves | 4-5-6 | ||
| 56 | Red Devils | 1-3-5 | def. | Maroons | 2-4-6 | ||
| 57 | Romans | 1-2-5 | def. | Varsity | 3-4-6 | ||
| 58 | Scouts | 1-2-3 | def. | Ramblers | 4-5-6 | ||
| 59 | Trevian | 1-2-3 | def. | Friars | 4-5-6 | ||
| 60 | Wolfpack | 1-2-4 | def. | Wildkits | 3-5-6 | ||
| 61 | Grizzlies | 1-2-3 | def. | Wolves | 4-5-6 | ||
| 62 | Ramblers | 1-3-5 | def. | Varsity | 2-4-6 | ||
| 63 | Scouts | 2-3-5 | def. | Romans | 1-4-6 | ||
| 64 | Trevian | 1-2-4 | def. | Red Devils | 3-5-6 | ||
| 65 | Wildkits | 1-4-5 | def. | Maroons | 2-3-6 | ||
| 66 | Wolfpack | 1-3-5 | def. | Friars | 2-4-6 | ||
| 67 | Trevian | 1-2-3 | def. | Wolfpack | 4-5-6 | ||
| 68 | Red Devils | 1-2-5 | def. | Romans | 3-4-6 | ||
| 69 | Scouts | 2-3-5 | def. | Grizzlies | 1-4-6 | ||
| 70 | Red Devils | 1-2-5 | def. | Wolfpack | 3-4-6 | ||
| 71 | Trevian | 1-2-4 | def. | Grizzlies | 3-5-6 | ||
| 72 | Romans | 1-3-6 | def. | Scouts | 2-4-5 | ||
| 73 | Red Devils | 1-2-4 | def. | Grizzlies | 3-5-6 | ||
| 74 | Romans | 1-4-5 | def. | Wolfpack | 2-3-6 | ||
| 75 | Trevian | 1-2-6 | def. | Scouts | 3-4-5 | ||
| 76 | Romans | 2-3-5 | def. | Grizzlies | 1-4-6 | ||
| 77 | Red Devils | 1-3-5 | def. | Trevian | 2-4-6 | ||
| 78 | Wolfpack | 1-3-6 | def. | Scouts | 2-4-5 | ||
| 79 | Romans | 1-2-4 | def. | Trevian | 3-5-6 | ||
| 80 | Grizzlies | 1-2-5 | def. | Wolfpack | 3-4-6 | ||
| 81 | Red Devils | 2-3-4 | def. | Scouts | 1-5-6 | ||
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 ±0.22 means a rating gap counts about 19% less 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.
Short write-ups of what the ratings and results show, with the numbers and how they were computed.