Official NHA Assessment
Race 4: BREEDERS GUINEAS PLATE (Fillies) (For 3 year-old Fillies)
Line Horse
Luna Halo
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
6 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Luna Halo 4 60.0 1 0.00 2.5 103 103 103 +0 2 Public Benefit 2 56.0 2 1.25 0.0 91 104 104 +13 3 Global Rush 2 56.0 3 5.25 0.0 77 100 100 +23 4 Symbol Of Love 2 54.0 4 5.50 0.0 71 96 96 +25 5 Idita 4 56.0 5 9.00 2.5 93 95 95 +2 6 Summer Odyssey 2 54.0 6 9.10 0.0 88 96 96 +8 7 Successful Lady 2 54.0 7 13.10 0.0 59 96 96 +37 99 Back For More 4 56.0 99 0.00 2.5 - 95 95 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Luna Halo Line | 103 | 106 | 103 | +3 | 2.5 | ||
| 2 | Public Benefit | 91 | 86 | 104 | -18 | 0.0 | - | |
| 3 | Global Rush | 77 | 82 | 100 | -18 | 0.0 | - | |
| 4 | Symbol Of Love | 71 | 94 | 96 | -2 | 0.0 | - | |
| 5 | Idita | 93 | 79 | 95 | -16 | 2.5 | - | |
| 6 | Summer Odyssey | 88 | 84 | 96 | -12 | 0.0 | - | |
| 7 | Successful Lady | 59 | 56 | 96 | -40 | 0.0 | - | |
| 99 | Back For More | - | 75 | 95 | -20 | 2.5 | - |
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