Official NHA Assessment
Race 4: MERIT RATED 84 HANDICAP (Open)
Line Horse
Guerra
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
1 / 6
Within 2 points
Significant Diffs
5 / 6
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Force Eight 3 57.5 1 0.00 3.5 84 80 84 +0 2 Tom's Diner 4 58.5 2 0.10 4.0 81 81 81 +0 3 Guerra 4 60.0 3 1.60 4.0 84 84 84 +0 4 Ultimate Jewel 5 59.5 4 3.85 0.0 83 91 91 +8 5 Red Top 5 56.5 5 4.35 0.0 77 85 85 +8 6 Power Ranger 7 60.0 6 4.60 0.0 84 92 92 +8 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Force Eight | 84 | 77 | 84 | -7 | 3.5 | - | |
| 2 | Tom's Diner | 81 | 94 | 81 | +13 | 4.0 | - | |
| 3 | Guerra Line | 84 | 86 | 84 | +2 | 4.0 | ||
| 4 | Ultimate Jewel | 83 | 80 | 91 | -11 | 0.0 | - | |
| 5 | Red Top | 77 | 70 | 85 | -15 | 0.0 | - | |
| 6 | Power Ranger | 84 | 69 | 92 | -23 | 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