Official NHA Assessment
Race 1: WILGERBOSDRIFT RUFFIAN STAKES (Listed) (For 2 yof 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
6 / 6
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Glastonbury 2 60.0 1 0.00 2.5 - - - +0 2 Green Diamond 2 57.0 2 2.10 2.5 - - - +0 3 Elegantrix 2 60.0 3 2.40 2.5 - - - +0 4 Princess Keira 2 57.0 4 7.65 2.5 - - - +0 5 Bright And Brazen 2 57.0 5 9.15 2.5 - - - +0 6 Back From War 2 57.0 6 9.40 2.5 - - - +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Glastonbury | - | 94 | - | +94 | 2.5 | - | |
| 2 | Green Diamond | - | 111 | - | +111 | 2.5 | - | |
| 3 | Elegantrix | - | 106 | - | +106 | 2.5 | - | |
| 4 | Princess Keira | - | 87 | - | +87 | 2.5 | - | |
| 5 | Bright And Brazen | - | 97 | - | +97 | 2.5 | - | |
| 6 | Back From War | - | 86 | - | +86 | 2.5 | - |
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