Official NHA Assessment
Race 2: COACHELLA MERIT RATED 55 HANDICAP (Open)
Line Horse
Copper Fire
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
1 / 5
Within 2 points
Significant Diffs
4 / 5
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 King's Crown 3 58.0 1 0.00 6.0 63 61 63 +0 2 Duchess Of War 2 60.0 2 1.00 0.0 55 81 81 +26 3 Copper Fire 3 57.5 3 2.50 6.0 62 62 62 +0 4 Pair Of Aces 4 57.5 4 2.75 3.0 50 68 68 +18 99 Prince Of Denmark 4 60.0 99 0.00 3.0 - 71 71 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | King's Crown | 63 | 79 | 63 | +16 | 6.0 | - | |
| 2 | Duchess Of War | 55 | 55 | 81 | -26 | 0.0 | - | |
| 3 | Copper Fire Line | 62 | 60 | 62 | -2 | 6.0 | ||
| 4 | Pair Of Aces | 50 | 39 | 68 | -29 | 3.0 | - | |
| 99 | Prince Of Denmark | - | 51 | 71 | -20 | 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