Official NHA Assessment
Race 4: RACEHORSE OWNERS ASSOCIATION FM 68 HANDICAP (F & M) (For Fillies and Mares)
Line Horse
Stunning Kitten
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
3 / 7
Within 2 points
Significant Diffs
4 / 7
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Mirren 4 60.0 1 0.00 7.0 68 48 68 +0 2 Ashanti Sword 2 55.0 2 1.00 0.0 78 58 68 -10 3 Stunning Kitten 5 58.0 3 1.20 0.0 64 64 64 +0 4 Seconda Errore 3 59.5 4 2.45 10.0 69 45 59 -10 5 Saint Anastasia 3 58.0 5 2.70 10.0 66 42 56 -10 6 Sacred Valley 3 55.5 6 3.40 10.0 64 36 54 -10 7 Mariposa 4 51.5 7 4.60 7.0 54 32 44 -10 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Mirren | 68 | 67 | 68 | -1 | 7.0 | - | |
| 2 | Ashanti Sword | 78 | 52 | 68 | -16 | 0.0 | - | |
| 3 | Stunning Kitten Line | 64 | 66 | 64 | +2 | 0.0 | ||
| 4 | Seconda Errore | 69 | 68 | 59 | +9 | 10.0 | - | |
| 5 | Saint Anastasia | 66 | 63 | 56 | +7 | 10.0 | - | |
| 6 | Sacred Valley | 64 | 44 | 54 | -10 | 10.0 | - | |
| 7 | Mariposa | 54 | 46 | 44 | +2 | 7.0 | - |
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