Official NHA Assessment
Race 5: TONY RUFFEL STAKES (Grade 3) (3 year olds)
Line Horse
Arividicio
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
0 / 6
Within 2 points
Significant Diffs
6 / 6
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Royal Victory 5 57.0 1 0.00 0.0 111 92 92 -19 2 Arividicio 5 57.0 2 3.75 0.0 93 93 93 +0 3 Golden Prospect 2 57.0 3 4.00 0.0 96 93 93 -3 4 Now I Got You 5 57.0 4 7.25 0.0 103 92 93 -10 5 Strike A Match 2 54.5 5 15.75 0.0 90 87 87 -3 99 Thunderstruck 2 60.0 99 0.00 0.0 - 98 98 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Royal Victory | 111 | 124 | 92 | +32 | 0.0 | - | |
| 2 | Arividicio Line | 93 | 50 | 93 | -43 | 0.0 | ||
| 3 | Golden Prospect | 96 | 83 | 93 | -10 | 0.0 | - | |
| 4 | Now I Got You | 103 | 67 | 93 | -26 | 0.0 | - | |
| 5 | Strike A Match | 90 | 76 | 87 | -11 | 0.0 | - | |
| 99 | Thunderstruck | - | 128 | 98 | +30 | 0.0 | - |
Assessment Methodology
Calculation Steps:
- Identify Line Horse - consistent performer used as reference
- Calculate WFA Allowance based on age, distance, and month
- Apply Drag Adjustment for beaten margin
- Calculate Actual Weight Performance:
Weight - Drag - WFA - Compare to Line Horse to determine race rating
- Apply special rules (maiden caps, layoff allowance)
Key Formulas:
- Drag Effect: Varies by distance (see Benchmarks page)
- 1 length ≈ 1kg at 1 mile (1600m)
- WFA Scale: Based on Admiral Rous's 1855 table
- Rating Points: 1kg = 2 rating points