Official NHA Assessment
Race 2: RACING TODAY MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)
Line Horse
Duchess Zahra
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
7 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Duchess Zahra 3 58.5 1 0.00 6.0 - - - +0 2 Princess Of All 3 60.0 2 0.90 6.0 71 3 61 -10 3 Elegant Edge 3 60.0 3 2.60 6.0 - 3 3 +3 4 Mystical Butterfly 3 60.0 4 4.40 6.0 - 3 3 +3 5 Nicolson Landing 3 60.0 5 5.90 6.0 - 3 3 +3 6 Foxy After Dark 3 60.0 6 6.15 6.0 - 3 3 +3 7 Loveonthehorizon 3 60.0 7 6.45 6.0 49 3 39 -10 8 Bell Of Angelus 2 60.0 8 7.45 4.0 66 7 56 -10 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Duchess Zahra Line | - | 76 | - | +76 | 6.0 | ||
| 2 | Princess Of All | 71 | 73 | 61 | +12 | 6.0 | - | |
| 3 | Elegant Edge | - | 70 | 3 | +67 | 6.0 | - | |
| 4 | Mystical Butterfly | - | 72 | 3 | +69 | 6.0 | - | |
| 5 | Nicolson Landing | - | 74 | 3 | +71 | 6.0 | - | |
| 6 | Foxy After Dark | - | - | 3 | -3 | 6.0 | - | |
| 7 | Loveonthehorizon | 49 | 59 | 39 | +20 | 6.0 | - | |
| 8 | Bell Of Angelus | 66 | 71 | 56 | +15 | 4.0 | - |
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