Official NHA Assessment
Race 2: #YOUCANBETONUS! FILLIES GUINEAS PLATE (For 3 year-old Fillies)
Line Horse
North Star
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
3 / 7
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Silva City 2 60.0 1 0.00 0.0 95 88 88 -7 2 East Coast Girl 2 60.0 2 3.25 0.0 85 90 90 +5 3 North Star 2 58.0 3 5.75 0.0 84 84 84 +0 4 Royal City Girl 2 58.0 4 7.25 0.0 93 84 84 -9 5 Silvan Mistress 2 60.0 5 8.75 0.0 85 88 88 +3 6 Star Of Elena 2 58.0 6 9.00 0.0 81 84 84 +3 7 Barolo 2 58.0 7 12.50 0.0 86 84 84 -2 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Silva City | 95 | 99 | 88 | +11 | 0.0 | - | |
| 2 | East Coast Girl | 85 | 89 | 90 | -1 | 0.0 | - | |
| 3 | North Star Line | 84 | 85 | 84 | +1 | 0.0 | ||
| 4 | Royal City Girl | 93 | 93 | 84 | +9 | 0.0 | - | |
| 5 | Silvan Mistress | 85 | 91 | 88 | +3 | 0.0 | - | |
| 6 | Star Of Elena | 81 | 74 | 84 | -10 | 0.0 | - | |
| 7 | Barolo | 86 | 79 | 84 | -5 | 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