Official NHA Assessment
Race 1: 4RACING WELCOMES YOU WORK RIDERS MAIDEN PLATE (For all Maidens)
Line Horse
Mrs Stormiatrix
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
1 / 5
Within 2 points
Significant Diffs
3 / 5
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Mrs Stormiatrix 2 57.5 1 0.00 3.0 73 73 73 +0 2 Beach Walker 2 60.0 2 2.70 3.0 78 78 78 +0 3 Hurricane Power 2 57.5 3 4.30 3.0 61 73 73 +12 4 Jawbreaker 3 60.0 4 5.30 4.5 62 75 75 +13 5 Wispinthewillow 3 57.5 5 11.00 4.5 - 70 70 +70 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Mrs Stormiatrix Line | 73 | 81 | 73 | +8 | 3.0 | ||
| 2 | Beach Walker | 78 | 75 | 78 | -3 | 3.0 | - | |
| 3 | Hurricane Power | 61 | 63 | 73 | -10 | 3.0 | - | |
| 4 | Jawbreaker | 62 | 62 | 75 | -13 | 4.5 | - | |
| 5 | Wispinthewillow | - | 71 | 70 | +1 | 4.5 | - |
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