Official NHA Assessment
Race 1: 4RACING WELCOMES YOU MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)
Line Horse
Mary's Greenlight
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
0 / 13
Within 2 points
Significant Diffs
13 / 13
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Mary's Greenlight 4 55.0 1 0.00 3.5 82 82 82 +0 2 John Wick 2 58.0 2 2.25 0.0 75 98 98 +23 3 The Octagon 2 58.0 3 6.00 0.0 - 95 95 +95 4 Callaburn 2 58.0 4 6.50 0.0 72 95 95 +23 5 Horsefly 2 58.0 5 9.50 0.0 78 95 95 +17 6 Keiras Ranger 2 58.0 6 9.75 0.0 56 95 95 +39 7 Glacier Bay 3 58.0 7 13.00 6.0 - 83 83 +83 8 Pedasos 3 56.0 8 13.25 6.0 50 79 79 +29 9 Hat Furious 4 58.0 9 13.50 3.5 - 88 88 +88 10 Hunting Ground 3 58.0 10 14.75 6.0 55 83 83 +28 99 Bob 3 58.0 99 0.00 6.0 - 83 83 +0 99 Pearl Harbor 2 58.0 99 0.00 0.0 - 95 95 +0 99 Trip To States 5 60.0 99 0.00 0.0 - 99 99 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Mary's Greenlight Line | 82 | 103 | 82 | +21 | 3.5 | ||
| 2 | John Wick | 75 | 82 | 98 | -16 | 0.0 | - | |
| 3 | The Octagon | - | 76 | 95 | -19 | 0.0 | - | |
| 4 | Callaburn | 72 | 52 | 95 | -43 | 0.0 | - | |
| 5 | Horsefly | 78 | 73 | 95 | -22 | 0.0 | - | |
| 6 | Keiras Ranger | 56 | 64 | 95 | -31 | 0.0 | - | |
| 7 | Glacier Bay | - | 50 | 83 | -33 | 6.0 | - | |
| 8 | Pedasos | 50 | 53 | 79 | -26 | 6.0 | - | |
| 9 | Hat Furious | - | 53 | 88 | -35 | 3.5 | - | |
| 10 | Hunting Ground | 55 | 50 | 83 | -33 | 6.0 | - | |
| 99 | Bob | - | 52 | 83 | -31 | 6.0 | - | |
| 99 | Pearl Harbor | - | 62 | 95 | -33 | 0.0 | - | |
| 99 | Trip To States | - | 63 | 99 | -36 | 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