Zac-a-Tack
DinghyOptimist · 22704
870
+12±137
Overall Rank
—
Dinghy
Percentile
—
Dinghy
Rating
870
Confidence
±137
Medium
Races
10
Recent Form
+1
avg last 5 races
Last raced: Mar 16, 2024
Rating Over Time
1144+130Direct Competitors
Boats Zac-a-Tack has raced against most often, with head-to-head finish record.
North Star 23761
Optimist Championship · Rating 1202
4–6
40% wins · 10 races
Penguino22737
Optimist Championship · Rating 912
1–9
10% wins · 10 races
The Arrri Boy20980
Optimist Championship · Rating 798
10–0
100% wins · 10 races
Wahine7130
Optimist Championship · Rating 634
10–0
100% wins · 10 races
License to Krill23150
Optimist Championship · Rating 1351
2–8
20% wins · 10 races
Jar Jar Sinks23411
Optimist Championship Fleet · Rating 539
10–0
100% wins · 10 races
Wave Chaser23412
Optimist Championship Fleet · Rating 740
7–3
70% wins · 10 races
Hot Rod19483
Optimist · Rating 590
7–3
70% wins · 10 races
Race History
10 racesBIG ROCK Regatta · R6
Mar 16, 2024/6 of 29
+12
1144
BIG ROCK Regatta · R5
Mar 16, 2024/10 of 29
+14
1132
BIG ROCK Regatta · R4
Mar 16, 2024/10 of 29
+35
1118
BIG ROCK Regatta · R3
Mar 16, 2024/13 of 29
+7
1083
BIG ROCK Regatta · R2
Mar 16, 2024/17 of 29
-63
1077
BIG ROCK Regatta · R1
Mar 16, 2024/14 of 29
-48
1140
BIG ROCK Regatta · R10
Mar 15, 2024/11 of 29
+12
1188
BIG ROCK Regatta · R9
Mar 15, 2024/11 of 29
+69
1176
BIG ROCK Regatta · R8
Mar 15, 2024/10 of 29
+93
1107
BIG ROCK Regatta · R7
Mar 15, 2024/14 of 29
+223
1014
| Date | Regatta | Place | Rating After | Change |
|---|---|---|---|---|
| Mar 16, 2024 | BIG ROCK Regatta · R6 | 6 / 29 | 1144 | +12 |
| Mar 16, 2024 | BIG ROCK Regatta · R5 | 10 / 29 | 1132 | +14 |
| Mar 16, 2024 | BIG ROCK Regatta · R4 | 10 / 29 | 1118 | +35 |
| Mar 16, 2024 | BIG ROCK Regatta · R3 | 13 / 29 | 1083 | +7 |
| Mar 16, 2024 | BIG ROCK Regatta · R2 | 17 / 29 | 1077 | -63 |
| Mar 16, 2024 | BIG ROCK Regatta · R1 | 14 / 29 | 1140 | -48 |
| Mar 15, 2024 | BIG ROCK Regatta · R10 | 11 / 29 | 1188 | +12 |
| Mar 15, 2024 | BIG ROCK Regatta · R9 | 11 / 29 | 1176 | +69 |
| Mar 15, 2024 | BIG ROCK Regatta · R8 | 10 / 29 | 1107 | +93 |
| Mar 15, 2024 | BIG ROCK Regatta · R7 | 14 / 29 | 1014 | +223 |
About the Rating
Ratings are computed using Glicko-2, a chess-style system that considers who you beat and who beat you. Winning against higher-rated boats earns more points than beating lower-rated boats.
The overall rank compares this boat to all others across every class. To see how it stacks up within its class, use the “View all Optimist” link above.
The confidence band (±137) shows how certain we are about this rating. It narrows as more races are completed and widens during periods of inactivity.
The shaded area on the chart represents the 95% confidence interval — the true skill of this boat likely falls within that range.