Official NHA Assessment
Race 4: GLEN MONARCH MIDDLE STAKES (82) (F&M) (For horses with nett rating of 82 and below)
Line Horse
Nandine
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
1 / 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 Tigers Eagle 3 58.0 1 0.00 3.5 74 76 76 +2 2 Nandine 3 58.0 2 0.25 3.5 76 76 76 +0 3 Jacky Sparrow 3 60.0 3 4.25 3.5 81 81 81 +0 4 Obscure 4 60.0 4 6.25 1.5 81 84 84 +3 5 Ian's Ferrari 3 58.0 5 7.50 3.5 75 76 76 +1 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Tigers Eagle | 74 | 79 | 76 | +3 | 3.5 | - | |
| 2 | Nandine Line | 76 | 60 | 76 | -16 | 3.5 | ||
| 3 | Jacky Sparrow | 81 | 80 | 81 | -1 | 3.5 | - | |
| 4 | Obscure | 81 | 87 | 84 | +3 | 1.5 | - | |
| 5 | Ian's Ferrari | 75 | 63 | 76 | -13 | 3.5 | - |
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