Official NHA Assessment
Race 5: ZIMBABWE GUINEAS (Grade 3) (For all 3 year olds/ 1st leg Triple Crown)
Line Horse
Ultra Pursuit
Reference for assessment
Exact Matches
0 / 4
Calculated = Official
Close Matches
1 / 4
Within 2 points
Significant Diffs
2 / 4
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Ultra Pursuit 3 58.0 1 0.00 4.0 74 74 74 +0 2 Robin Of Locksley 3 58.0 2 1.75 4.0 - 77 77 +77 3 Winchester 2 58.0 3 2.00 0.0 69 85 85 +16 4 Zambezi Sunset 2 58.0 4 2.75 0.0 60 84 84 +24 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Ultra Pursuit Line | 74 | 78 | 74 | +4 | 4.0 | ||
| 2 | Robin Of Locksley | - | 75 | 77 | -2 | 4.0 | - | |
| 3 | Winchester | 69 | 69 | 85 | -16 | 0.0 | - | |
| 4 | Zambezi Sunset | 60 | 60 | 84 | -24 | 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