Official NHA Assessment
Race 6: GREYVILLE CONVENTION CENTRE FM 66 HANDICAP (F & M) (For Fillies and Mares)
Line Horse
Sleek As Silk
Reference for assessment
Exact Matches
1 / 12
Calculated = Official
Close Matches
1 / 12
Within 2 points
Significant Diffs
8 / 12
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Zinikele 5 59.5 1 0.00 0.0 77 75 77 +0 2 Sleek As Silk 2 56.0 2 2.40 0.0 70 70 70 +0 3 Royal Kitty 5 59.0 3 3.30 0.0 64 75 75 +11 4 Venturous 3 61.0 4 4.40 6.0 68 66 66 -2 5 Maid In France 4 57.0 5 4.80 3.5 60 63 63 +3 6 Birdwatcher 5 57.0 6 5.05 0.0 60 70 70 +10 7 Top Honours 4 53.0 7 6.55 3.5 52 55 55 +3 8 Casa Rosada 4 52.0 8 7.05 3.5 58 53 53 -5 9 Lollapalooza 3 59.0 9 7.25 6.0 69 62 62 -7 10 Leopard Lady 4 55.0 10 7.35 3.5 56 59 59 +3 11 Spirit Of Dacha 4 56.0 11 14.35 3.5 58 61 61 +3 12 Umhlali 2 58.0 12 23.15 0.0 77 72 72 -5 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Zinikele | 77 | 89 | 77 | +12 | 0.0 | - | |
| 2 | Sleek As Silk Line | 70 | 87 | 70 | +17 | 0.0 | ||
| 3 | Royal Kitty | 64 | 66 | 75 | -9 | 0.0 | - | |
| 4 | Venturous | 68 | 66 | 66 | ✓ Match | 6.0 | - | |
| 5 | Maid In France | 60 | 57 | 63 | -6 | 3.5 | - | |
| 6 | Birdwatcher | 60 | 53 | 70 | -17 | 0.0 | - | |
| 7 | Top Honours | 52 | 45 | 55 | -10 | 3.5 | - | |
| 8 | Casa Rosada | 58 | 57 | 53 | +4 | 3.5 | - | |
| 9 | Lollapalooza | 69 | 74 | 62 | +12 | 6.0 | - | |
| 10 | Leopard Lady | 56 | 55 | 59 | -4 | 3.5 | - | |
| 11 | Spirit Of Dacha | 58 | 53 | 61 | -8 | 3.5 | - | |
| 12 | Umhlali | 77 | 67 | 72 | -5 | 0.0 | - |
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