Official NHA Assessment
Race 2: THE CHIKARA CLASSIFIED STAKES (For horses with nett rating of 71 and below)
Line Horse
Bruce's Spirit
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
0 / 5
Within 2 points
Significant Diffs
4 / 5
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Ian's Ferrari 3 56.5 1 0.00 1.5 70 58 58 -12 2 Power Ranger 7 52.5 2 1.00 0.0 55 57 57 +2 3 Bruce's Spirit 6 60.0 3 1.75 0.0 71 71 71 +0 4 Days Gone By 3 50.0 4 6.75 1.5 53 45 45 -8 99 Star Aglow 3 56.5 99 0.00 1.5 - 58 58 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Ian's Ferrari | 70 | 63 | 58 | +5 | 1.5 | - | |
| 2 | Power Ranger | 55 | 69 | 57 | +12 | 0.0 | - | |
| 3 | Bruce's Spirit Line | 71 | 55 | 71 | -16 | 0.0 | ||
| 4 | Days Gone By | 53 | 51 | 45 | +6 | 1.5 | - | |
| 99 | Star Aglow | - | 74 | 58 | +16 | 1.5 | - |
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