David Alfonso

Rating History

Singlehanded & Keelboat Ratings

DisciplineRating Rank RacesLast raced
Singlehanded2.71unranked (fewer than 10 races or not active)28Fall 2013

Team Race Rating

Rating Rank vs fleet rating Record
2.48 (fleet 3.42) unranked (fewer than 30 matches as skipper, or not active) +0.00 ± 0.18
about what the fleet rating predicts
as skipper 58–47 (55%)
SeasonRegattas Skipper W–LCrew W–L
Spring 2014550–37—
Spring 201328–10—
2.72.82.933.13.2Spring 2013Spring 2014Fowle Trophy (2013-05-04): rating 3.08, fleet rating alone 3.02, offset +0.07; record 0-5 in this boatTR Invite (2014-03-08): rating 3.00, fleet rating alone 3.00, offset +0.00; record 11-5 in this boatIke Geiger Team Race Trophy (2014-03-15): rating 3.06, fleet rating alone 3.03, offset +0.04; record 9-6 in this boatStaake Trophy (2014-03-22): rating 2.97, fleet rating alone 2.95, offset +0.02; record 16-7 in this boat33rd Lynne Marchiando Regatta (2014-03-29): rating 2.89, fleet rating alone 2.87, offset +0.02; record 10-12 in this boatFowle New England Team Race Champs (2014-04-05): rating 2.84, fleet rating alone 2.82, offset +0.02; record 4-7 in this boatTeam race rating

Rating before each regatta driven (solid; dots green when the boat won 60% or more of its matches there, red under 40%) and what the fleet rating alone would give (dashed). The gap is the team race offset as it stood at the time. Hover a dot for the regatta; click to open it.

Team race surprisal: regatta by regatta

Over 6 graded regattas (92 matches) the record is 50–42 against 49.6 wins the pre-event forecasts expected (+0.4). 1 regatta clearly above the rating (P ≤ 20%), 2 clearly below (P ≥ 80%); 8 bits of surprise in all.

DateRegattaRole Value Perf. RecordExp.
wins
Δ Surprise
(bits)
P(this good
or better)
2014-04-05Fowle New England Team Race Champsskipper3.493.894–73.2+0.400.239%
2014-03-2933rd Lynne Marchiando Regattaskipper3.423.3810–1210.2−0.040.063%
2014-03-22Staake Trophyskipper3.473.6916–715.1+0.220.142%
2014-03-15Ike Geiger Team Race Trophyskipper3.542.949–610.6−0.600.790%
2014-03-08TR Inviteskipper3.114.0611–58.1+0.941.99%
2013-05-04Fowle Trophyskipper3.330.330–52.4≤−3.005.1>99%

Regatta results

Regatta Role Div Races Avg Rating
Spring 2014 Team page Season
TR Invite Skipper TR 20 75% —
Staake Trophy Skipper TR 23 70% —
Owen, Mosbacher and Knapp Trophies Skipper A 14 8.0 3.26
33rd Lynne Marchiando Regatta Skipper TR 22 46% —
Ike Geiger Team Race Trophy Skipper TR 15 60% —
Fowle New England Team Race Champs Skipper TR 11 36% —
Coast Guard Bowl/N.E. Dinghy Champs Skipper A 14 9.4 3.55
79th Boston Dinghy Cup Skipper A 14 8.9 3.36
Fall 2013 Team page Season
75th Annual Oberg Trophy Skipper A 18 7.0 3.55
Navy Fall Skipper A 20 9.3 3.60
Hatch Brown Trophy Skipper A 17 7.6 3.96
39th Harry H. Anderson Jr Trophy Skipper A 14 8.6 3.44
Danmark Trophy Skipper A 10 13.8 2.83
Atlantic Coast Championships Skipper A 13 12.5 3.09
73rd Annual Professor Schell Trophy Skipper A 9 7.6 3.88
NEISA Men's Singlehanded Champs Singlehanded Skipper A 10 8.7 3.53
Spring 2013 Team page Season
Truxtun Umsted Skipper C 12 8.1 3.15
Sharpe Trophy Skipper TR 13 62% —
Gill Coed Championships Skipper B 11 9.4 3.50
Fowle Trophy Skipper TR 5 0% —
Boston Dinghy Club Challenge Cup Skipper C 17 5.7 3.47
College Sailing Western Semifinal Skipper B 5 4.0 4.50
Fall 2011 Team page Season
Professor Steadman Hood Trophy Skipper B 4 8.8 2.81
138th Rudolph Oberg Trophy Skipper B 11 6.5 3.07
Navy Fall Skipper C 18 7.3 3.33
The Hatch Brown Trophy Skipper C 16 7.7 2.96
Atlantic Coast Championship Skipper A 4 8.5 3.74
Spring 2011 Team page Season
NEISA Coed Dinghy Championship Skipper B 2 8.0 3.26
82nd Boston Dinghy Cup Skipper C 18 9.1 2.49
Admiral's Cup Skipper C 10 10.0 2.50
Fall 2010 Team page Season
Penbay Open Skipper B 10 7.1 1.91
Oberg Trophy Skipper B 10 6.9 2.88
Nevins Trophy Skipper C 6 9.0 2.82
Navy Fall Skipper C 20 8.4 3.12
Hatch Brown Trophy Crew B 7 12.6 —
Commonwealth Series Skipper A 18 3.9 2.83
Atlantic Coast Dinghies Skipper B 3 16.7 0.36
Spring 2010 Team page Season
Old Guard Skipper B 12 7.6 2.57
Oberg Trophy Skipper A 8 3.9 3.42
George Morris Trophy Skipper A 9 5.0 3.01
Admiral's Cup Skipper C 8 8.4 2.15
Fall 2009 Team page Season
Professor Smith Trophy Skipper A 7 8.3 2.75
Oberg Trophy- Greater Boston Skipper C 12 6.8 2.53
Ne Freshman, Nickerson Trophy Skipper B 13 4.4 2.48
Men's Ne Singlehanded Singlehanded Skipper A 18 13.9 1.71
Freshmen Skipper A 10 6.5 2.56

From the notes

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

All notes →