Official NHA Assessment
Race 1: MAIDEN PLATE (Maiden Plate Colts & Geldings to carry)
Line Horse
Evocative
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
1 / 6
Within 2 points
Significant Diffs
3 / 6
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Nandine 3 57.5 1 0.00 1.0 - 47 6 +6 2 Evocative 3 57.0 2 0.75 1.0 50 50 50 +0 3 Apache Gold 3 60.0 3 0.80 1.0 50 56 56 +6 4 Onceajackpot 3 60.0 4 1.55 1.0 40 55 55 +15 5 Red Orchid 3 57.0 5 11.55 1.0 - 46 46 +46 6 Aratula 3 60.0 6 16.55 1.0 47 52 52 +5 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Nandine | - | 60 | 6 | +54 | 1.0 | - | |
| 2 | Evocative Line | 50 | 44 | 50 | -6 | 1.0 | ||
| 3 | Apache Gold | 50 | 52 | 56 | -4 | 1.0 | - | |
| 4 | Onceajackpot | 40 | 53 | 55 | -2 | 1.0 | - | |
| 5 | Red Orchid | - | 43 | 46 | -3 | 1.0 | - | |
| 6 | Aratula | 47 | 45 | 52 | -7 | 1.0 | - |
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