Official NHA Assessment
Race 6: ZIMBABWE GUINEAS (Grade 3) (For all 3 year olds/ 1st leg Triple Crown)
Line Horse
King's Crown
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
1 / 5
Within 2 points
Significant Diffs
4 / 5
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 River Power 3 58.0 1 0.00 3.0 76 71 71 -5 2 King's Crown 3 58.0 2 2.50 3.0 73 73 73 +0 3 Solartrip 3 58.0 3 8.50 3.0 63 71 71 +8 4 Zafar 3 58.0 4 15.50 3.0 80 71 71 -9 5 Burn Bright 3 55.5 5 20.50 3.0 62 66 66 +4 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | River Power | 76 | 97 | 71 | +26 | 3.0 | - | |
| 2 | King's Crown Line | 73 | 79 | 73 | +6 | 3.0 | ||
| 3 | Solartrip | 63 | 77 | 71 | +6 | 3.0 | - | |
| 4 | Zafar | 80 | 78 | 71 | +7 | 3.0 | - | |
| 5 | Burn Bright | 62 | 68 | 66 | +2 | 3.0 | - |
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