Official NHA Assessment
Race 5: ZIMBABWE 2000 (Grade 3) (For 3 yr olds/ 2nd Leg Triple Crown)
Line Horse
Winchester
Reference for assessment
Exact Matches
1 / 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 Ultra Pursuit 3 58.0 1 0.00 4.5 74 58 58 -16 2 Robin Of Locksley 3 58.0 2 1.00 4.5 - 64 64 +64 3 Winchester 2 58.0 3 4.00 0.0 69 69 69 +0 4 Zambezi Sunset 2 58.0 4 6.00 0.0 60 67 67 +7 99 Sally Port 2 55.5 99 0.00 0.0 - 62 62 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Ultra Pursuit | 74 | 78 | 58 | +20 | 4.5 | - | |
| 2 | Robin Of Locksley | - | 75 | 64 | +11 | 4.5 | - | |
| 3 | Winchester Line | 69 | 69 | 69 | ✓ Match | 0.0 | ||
| 4 | Zambezi Sunset | 60 | 60 | 67 | -7 | 0.0 | - | |
| 99 | Sally Port | - | 79 | 62 | +17 | 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