Official NHA Assessment
Race 6: TRACK AND BALL DERBY (Grade 3) (For Horses at Weight For Age + Penalties)
Line Horse
Aragosta
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
4 / 7
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Runaway Song 6 58.0 1 0.00 0.0 92 116 98 +6 2 Aragosta 3 58.0 2 1.80 3.0 114 114 114 +0 3 With Pleasure 3 58.0 3 4.80 3.0 90 110 110 +20 4 Shangani 4 59.0 4 4.90 1.0 120 116 116 -4 5 Salvator Mundi 4 60.0 5 5.70 1.0 109 118 118 +9 6 Airways Law 4 59.0 6 6.00 1.0 110 116 116 +6 99 Platinum Sky 3 58.0 99 0.00 3.0 - 110 110 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Runaway Song | 92 | 98 | 98 | ✓ Match | 0.0 | - | |
| 2 | Aragosta Line | 114 | 109 | 114 | -5 | 3.0 | ||
| 3 | With Pleasure | 90 | 97 | 110 | -13 | 3.0 | - | |
| 4 | Shangani | 120 | 118 | 116 | +2 | 1.0 | - | |
| 5 | Salvator Mundi | 109 | 98 | 118 | -20 | 1.0 | - | |
| 6 | Airways Law | 110 | 102 | 116 | -14 | 1.0 | - | |
| 99 | Platinum Sky | - | 99 | 110 | -11 | 3.0 | - |
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