Official NHA Assessment
Race 5: CARLING BLACK LABEL ADVANCE PLATE (For winners)
Line Horse
Action Zone
Reference for assessment
Exact Matches
1 / 5
Calculated = Official
Close Matches
2 / 5
Within 2 points
Significant Diffs
2 / 5
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Obscure 4 58.0 1 0.00 1.0 81 90 87 +6 2 Jet Mirage 3 61.5 2 1.75 2.5 103 97 97 -6 3 Action Zone 3 57.5 3 3.00 2.5 88 88 88 +0 4 Tigers Eagle 3 58.5 4 6.50 2.5 78 88 88 +10 5 Battle Of Seattle 2 55.0 5 13.50 0.0 79 86 86 +7 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Obscure | 81 | 87 | 87 | ✓ Match | 1.0 | - | |
| 2 | Jet Mirage | 103 | 100 | 97 | +3 | 2.5 | - | |
| 3 | Action Zone Line | 88 | 90 | 88 | +2 | 2.5 | ||
| 4 | Tigers Eagle | 78 | 79 | 88 | -9 | 2.5 | - | |
| 5 | Battle Of Seattle | 79 | 59 | 86 | -27 | 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