Official NHA Assessment
Race 4: SA DERBY 4 APRIL MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)
Line Horse
Utsaah
Reference for assessment
Exact Matches
1 / 5
Calculated = Official
Close Matches
3 / 5
Within 2 points
Significant Diffs
1 / 5
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Utsaah 2 60.0 1 0.00 0.0 77 77 77 +0 2 Chariklo 3 60.0 2 2.90 3.0 63 73 73 +10 3 Nicolson Landing 3 60.0 3 4.70 3.0 74 71 71 -3 4 Be My Fate 4 60.0 4 5.20 1.5 - 74 74 +74 5 Made To Measure 3 60.0 5 6.90 3.0 73 71 71 -2 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Utsaah Line | 77 | 77 | 77 | ✓ Match | 0.0 | ||
| 2 | Chariklo | 63 | 71 | 73 | -2 | 3.0 | - | |
| 3 | Nicolson Landing | 74 | 74 | 71 | +3 | 3.0 | - | |
| 4 | Be My Fate | - | - | 74 | -74 | 1.5 | - | |
| 5 | Made To Measure | 73 | 73 | 71 | +2 | 3.0 | - |
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