Official NHA Assessment
Race 2: CLASSIFIED STAKES (For horses with nett rating of 77 and below)
Line Horse
Karvani
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
0 / 5
Within 2 points
Significant Diffs
3 / 5
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 River Power 3 54.0 1 0.00 9.0 66 38 38 -28 2 Karvani 7 58.5 2 1.50 0.0 68 68 68 +0 3 Bruce's Spirit 6 57.0 3 1.60 0.0 64 65 65 +1 4 Cutback 6 60.0 4 1.85 0.0 75 71 71 -4 99 Duchess Of War 2 51.0 99 0.00 0.0 - 50 50 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | River Power | 66 | 97 | 38 | +59 | 9.0 | - | |
| 2 | Karvani Line | 68 | 73 | 68 | +5 | 0.0 | ||
| 3 | Bruce's Spirit | 64 | 55 | 65 | -10 | 0.0 | - | |
| 4 | Cutback | 75 | 63 | 71 | -8 | 0.0 | - | |
| 99 | Duchess Of War | - | 55 | 50 | +5 | 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