Official NHA Assessment
Race 1: WELCOME TO NELSON MANDELA BAY MAIDEN JUVENILE PLATE (For 2 yo R100 000 Win BSA / CRS Bonus)
Line Horse
None identified
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
0 / 6
Within 2 points
Significant Diffs
5 / 6
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Instaworthy 2 57.5 1 0.00 4.0 - - - +0 2 Silva City 2 57.5 2 0.50 4.0 - - - +0 3 Sports Fan 2 57.5 3 2.25 4.0 - - - +0 4 Royal Missy 2 57.5 4 8.50 4.0 - - - +0 5 Arlu 2 60.0 5 9.75 4.0 - - - +0 99 Mio Destino 2 60.0 99 0.00 4.0 - - - +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Instaworthy | - | 107 | - | +107 | 4.0 | - | |
| 2 | Silva City | - | 99 | - | +99 | 4.0 | - | |
| 3 | Sports Fan | - | 92 | - | +92 | 4.0 | - | |
| 4 | Royal Missy | - | 83 | - | +83 | 4.0 | - | |
| 5 | Arlu | - | 68 | - | +68 | 4.0 | - | |
| 99 | Mio Destino | - | 69 | - | - | 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