Official NHA Assessment
Race 3: ALLIED STEELRODE MR 90 HANDICAP (Open)
Line Horse
Birthright
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
5 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Total Surrender 5 57.0 1 0.00 0.0 84 96 84 +0 2 Royal Edition 4 57.0 2 1.10 4.5 85 91 91 +6 3 Birthright 4 53.0 3 1.30 4.5 82 82 82 +0 4 Mount Darwin 3 57.0 4 1.50 8.0 90 83 83 -7 5 Strewn Sky 2 58.5 5 1.60 0.0 88 102 102 +14 6 Royal Guide 4 58.5 6 21.60 4.5 87 90 90 +3 99 Parisian Walkway 3 55.5 99 0.00 8.0 - 77 77 +0 99 King's Express 3 60.0 99 0.00 8.0 - 86 86 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Total Surrender | 84 | 74 | 84 | -10 | 0.0 | - | |
| 2 | Royal Edition | 85 | 92 | 91 | +1 | 4.5 | - | |
| 3 | Birthright Line | 82 | 95 | 82 | +13 | 4.5 | ||
| 4 | Mount Darwin | 90 | 81 | 83 | -2 | 8.0 | - | |
| 5 | Strewn Sky | 88 | 69 | 102 | -33 | 0.0 | - | |
| 6 | Royal Guide | 87 | 87 | 90 | -3 | 4.5 | - | |
| 99 | Parisian Walkway | - | 113 | 77 | +36 | 8.0 | - | |
| 99 | King's Express | - | 102 | 86 | +16 | 8.0 | - |
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