Official NHA Assessment
Race 2: BETWAY MAIDEN PLATE (3-year-olds) (For Maiden 3-year-olds)
Line Horse
Matroosberg
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
3 / 8
Within 2 points
Significant Diffs
4 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Matroosberg 2 60.0 1 0.00 0.0 82 82 82 +0 2 My Lucky Charm 3 60.0 2 1.40 9.0 - 67 67 +67 3 Winchester 2 60.0 3 3.10 0.0 76 84 84 +8 4 Onceinabluemoon 2 57.0 4 3.40 0.0 - 77 77 +77 5 Emerald City 2 60.0 5 3.50 0.0 69 83 83 +14 6 Emerald Countess 2 57.0 6 6.25 0.0 - 76 76 +76 7 Oklahoma Smokeshow 2 60.0 7 13.00 0.0 - 82 82 +82 99 Thoonsil 3 60.0 99 0.00 9.0 - 64 64 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Matroosberg Line | 82 | 82 | 82 | ✓ Match | 0.0 | ||
| 2 | My Lucky Charm | - | 73 | 67 | +6 | 9.0 | - | |
| 3 | Winchester | 76 | 69 | 84 | -15 | 0.0 | - | |
| 4 | Onceinabluemoon | - | 75 | 77 | -2 | 0.0 | - | |
| 5 | Emerald City | 69 | 71 | 83 | -12 | 0.0 | - | |
| 6 | Emerald Countess | - | 72 | 76 | -4 | 0.0 | - | |
| 7 | Oklahoma Smokeshow | - | 80 | 82 | -2 | 0.0 | - | |
| 99 | Thoonsil | - | 77 | 64 | +13 | 9.0 | - |
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