Official NHA Assessment
Race 10: COMPENDIUM INSURANCE BROKERS THUKELA HANDICAP (Listed) (Handicap)
Line Horse
Mary's Greenlight
Reference for assessment
Exact Matches
4 / 17
Calculated = Official
Close Matches
12 / 17
Within 2 points
Significant Diffs
4 / 17
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Narina Trogon 5 57.0 1 0.00 0.0 100 101 100 +0 2 Money Heist 2 57.0 2 0.90 0.0 100 105 105 +5 3 Get Impressed 2 56.5 3 1.90 0.0 101 103 103 +2 4 Mary's Greenlight 4 57.5 4 3.20 0.5 103 103 103 +0 5 Formagear 5 60.0 5 3.70 0.0 106 108 108 +2 6 Mr Master Starter 6 55.0 6 3.95 0.0 96 98 98 +2 7 Navajo Nation 4 60.0 7 4.00 0.5 108 107 107 -1 8 Noble City 3 59.5 8 4.05 1.0 105 105 105 +0 8 On The Horizon 4 57.0 8 4.05 0.5 100 101 101 +1 10 That's My Baby 2 54.5 10 5.75 0.0 97 96 96 -1 11 Lady Heist 2 56.0 11 7.65 0.0 98 99 99 +1 12 The Shepherd 3 53.0 12 7.85 1.0 93 91 91 -2 13 Lady Of Power 2 57.5 13 7.90 0.0 101 102 102 +1 14 Grinkov 2 58.0 14 10.30 0.0 102 103 103 +1 99 Last One Standing 3 53.0 99 0.00 1.0 - 91 91 +0 99 Celestial City 4 53.0 99 0.00 0.5 - 92 92 +0 99 Juliet Tango 6 54.5 99 0.00 0.0 95 96 95 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Narina Trogon | 100 | 102 | 100 | +2 | 0.0 | - | |
| 2 | Money Heist | 100 | 106 | 105 | +1 | 0.0 | - | |
| 3 | Get Impressed | 101 | 103 | 103 | ✓ Match | 0.0 | - | |
| 4 | Mary's Greenlight Line | 103 | 103 | 103 | ✓ Match | 0.5 | ||
| 5 | Formagear | 106 | 108 | 108 | ✓ Match | 0.0 | - | |
| 6 | Mr Master Starter | 96 | 97 | 98 | -1 | 0.0 | - | |
| 7 | Navajo Nation | 108 | 104 | 107 | -3 | 0.5 | - | |
| 8 | Noble City | 105 | 93 | 105 | -12 | 1.0 | - | |
| 8 | On The Horizon | 100 | 100 | 101 | -1 | 0.5 | - | |
| 10 | That's My Baby | 97 | 97 | 96 | +1 | 0.0 | - | |
| 11 | Lady Heist | 98 | 97 | 99 | -2 | 0.0 | - | |
| 12 | The Shepherd | 93 | 97 | 91 | +6 | 1.0 | - | |
| 13 | Lady Of Power | 101 | 100 | 102 | -2 | 0.0 | - | |
| 14 | Grinkov | 102 | 87 | 103 | -16 | 0.0 | - | |
| 99 | Last One Standing | - | 93 | 91 | +2 | 1.0 | - | |
| 99 | Celestial City | - | 92 | 92 | ✓ Match | 0.5 | - | |
| 99 | Juliet Tango | 95 | 81 | 95 | -14 | 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