Official NHA Assessment
Race 3: GUINEAS PLATE (For 3 year olds)
Line Horse
East Coast Girl
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
1 / 6
Within 2 points
Significant Diffs
3 / 6
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Royal Kingdom 2 60.0 1 0.00 0.0 99 91 91 -8 2 East Coast Girl 2 55.0 2 1.25 0.0 85 85 85 +0 3 Supreme Judge 2 58.0 3 1.35 0.0 78 90 90 +12 4 Above The Horizon 2 58.0 4 4.85 0.0 81 87 87 +6 5 Arlu 2 56.0 5 5.35 0.0 88 83 83 -5 6 Action America 2 56.5 6 7.60 0.0 81 84 84 +3 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Royal Kingdom | 99 | 103 | 91 | +12 | 0.0 | - | |
| 2 | East Coast Girl Line | 85 | 89 | 85 | +4 | 0.0 | ||
| 3 | Supreme Judge | 78 | 77 | 90 | -13 | 0.0 | - | |
| 4 | Above The Horizon | 81 | 86 | 87 | -1 | 0.0 | - | |
| 5 | Arlu | 88 | 68 | 83 | -15 | 0.0 | - | |
| 6 | Action America | 81 | 80 | 84 | -4 | 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