Ian Holtzworth

Discipline	Rating	Rank	Races	Last raced
Singlehanded	2.28	unranked (fewer than 10 races or not active)	11	Fall 2010

Regatta	Role	Div	Races	Avg	Rating
Spring 2011 Team page Season
Truxtun Umsted	Skipper	A	17	11.9	2.77
Greater New York Dinghy	Skipper	A	8	7.6	2.78
America Trophy	Skipper	A	6	11.2	2.12
Admiral's Cup	Skipper	A	10	10.9	2.76
Fall 2010 Team page Season
Top Nine Invitational	Skipper	A	14	4.9	3.53
North Fall 1	Skipper	B	14	4.4	2.76
Nevins Trophy	Skipper	C	6	7.7	3.17
Navy Fall	Skipper	D	20	7.5	2.87
The Moody Trophy	Skipper	B	13	10.5	2.32
Maisa Open	Skipper	A	7	2.6	3.20
Laser North #1 Singlehanded	Skipper	A	11	8.0	2.20
Danmark Trophy	Skipper	A	16	13.8	2.51
Atlantic Coast Dinghies	Skipper	A	8	12.4	2.68
Spring 2010 Team page Season
Robert P. Arrigan Memorial Reg	Skipper	A	11	5.5	2.70
ICSA/Gill Coed Dinghy Champs	Crew	A	1	11.0	—
America Trophy	Skipper	A	2	11.5	1.83
Admiral's Cup	Skipper	C	14	7.1	2.85
Fall 2009 Team page Season
Tom Curtis Memorial Regatta	Skipper	A	13	5.7	2.07
Navy Fall	Skipper	D	20	9.2	2.41
Maisa Top 9 Invite	Skipper	A	17	9.2	2.12
KP Dinghy Open	Skipper	B	15	2.7	3.01

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

How do skipper ratings work?A log-strength fitted to every race at once, smoothed week to week.
What a rating point is worthA one-point edge is a 73% chance to beat another boat in a race; two points is 88%.
How does a crew rating work?A crew rating is small and uncertain; a worked example on one roster.