CBI 5/12 420's

HostBB&N
Date05/12/2025
TypePromotional
BoatC420
Scoring1 Division

#	School	Team	A	TOT
1	BB&N - Buckingham Browne and Nichols	Knights 1	9	9
2	BB&N - Buckingham Browne and Nichols	Knights 2	15	15
3	The Winsor School	Wildcats 1	18	18
4	The Winsor School	Wildcats 2	22	22
5	Quincy High School	Presidents 2	27	27
6	Mermaids 1	Mermaids 1	27	27
7	FCSL 2	FCSL 2	34	34
8	Mermaids 2	Mermaids 2	40	40
9	Quincy High School	Presidents 1	40	40
10	Beaver Country Day School	Beavers 1	47	47
11	FCSL 1	FCSL 1	62	62
12	Beaver Country Day School	Beavers 2	65	65

School	Team	R1	R2	R3	R4	R5	TOT	Sailors
BB&N - Buckingham Browne and Nichols	Knights 1	1	1	2	4	1	9	Walker Cox '25 Asher Esty '25
BB&N - Buckingham Browne and Nichols	Knights 2	3	4	5	1	2	15	Scarlett Chan Macrae '26 Paul Jeon '25
The Winsor School	Wildcats 1	4	2	3	5	4	18	Morgan Sanborn '27 Alexis Sanborn '27
The Winsor School	Wildcats 2	6	5	6	2	3	22	Ada Horton '29 Sophia Kennedy '29
Quincy High School	Presidents 2	2	3	4	10	8	27
Mermaids 1	Mermaids 1	5	6	8	3	5	27
FCSL 2	FCSL 2	7	DNF	1	6	7	34
Mermaids 2	Mermaids 2	8	7	9	7	9	40
Quincy High School	Presidents 1	9	9	7	9	6	40	Frank Townsend '25
Beaver Country Day School	Beavers 1	11	8	10	8	10	47	Lucas Werning '27 Margarita Zalcman '28
FCSL 1	FCSL 1	10	DNS	DNS	DNS	DNS	62
Beaver Country Day School	Beavers 2	DNS	DNS	DNS	DNS	DNS	65	Addie Marsh '28 Madelyn Bell '26

Boat Speed Analyzer

SlowExpected boat effectFast

−0.090+0.09

Places per race a team should expect to gain or lose in this boat against what its sailors' ratings predict, from a model of this fleet fitted on every regatta sailed here since Spring 2024 (6 regattas). Shown at the 40% that holds up on regattas the model never saw; hover a sail for its value and uncertainty. Grey = boat not in the fit. How this is estimated.

Division A

Team	1A	2A	3A	4A	5A
BB&N - Buckingham Browne and Nichols Knights 1	17	17	17	17	17
BB&N - Buckingham Browne and Nichols Knights 2	3	3	3	3	3
Beaver Country Day School Beavers 1	7	7	7	7	7
Beaver Country Day School Beavers 2	0	0	0	0	0
Mermaids 1 Mermaids 1	14	14	14	14	14
Mermaids 2 Mermaids 2	13	13	13	13	13
Quincy High School Presidents 1	11	11	11	11	11
Quincy High School Presidents 2	12	12	12	12	12
The Winsor School Wildcats 1	5	5	5	5	5
The Winsor School Wildcats 2	6	6	6	6	6
FCSL 1 FCSL 1	2	2	2	2	2
FCSL 2 FCSL 2	16	16	16	16	16

School	Team	Skipper	Crew
BB&N - Buckingham Browne and Nichols	Knights 1	Walker Cox '25	Asher Esty '25
BB&N - Buckingham Browne and Nichols	Knights 2	Scarlett Chan Macrae '26	Paul Jeon '25
Beaver Country Day School	Beavers 1	Lucas Werning '27	Margarita Zalcman '28
Beaver Country Day School	Beavers 2	Addie Marsh '28	Madelyn Bell '26
Quincy High School	Presidents 1	Frank Townsend '25
The Winsor School	Wildcats 1	Morgan Sanborn '27	Alexis Sanborn '27
The Winsor School	Wildcats 2	Ada Horton '29	Sophia Kennedy '29

From the notes

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

What a rating point is worthA one-point edge is a 73% chance to beat another boat in a race; two points is 88%.
Should the best sailor sail A?Add your two skippers’ ratings and compare with the field; above it the better skipper belongs in A.
Are the boats even?Boats differ by about 0.3 places a race; fleets are uneven from day one.
Which venues get orderly in a breeze?Some venues get orderly when it blows, a few get messier; the fleet comes first.

All notes →

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CBI 5/12 420's

Division A

From the notes