Official NHA Assessment
Race 8: umTHOMBOTHI STAKES (For all Horses. Non-Black Type)
Line Horse
Isivivane
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
7 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 King Pelles 3 62.5 1 0.00 5.0 122 102 102 -20 2 Go Grayson Go 3 56.5 2 1.30 5.0 95 95 95 +0 3 Isivivane 3 58.0 3 1.80 5.0 98 98 98 +0 4 Down By The River 2 56.5 4 4.10 0.0 95 102 102 +7 5 Cape Eagle 7 62.5 5 6.70 0.0 108 112 112 +4 6 Trois Trois Quatre 5 55.0 6 8.00 0.0 92 97 97 +5 7 Gimmefabulous 3 58.5 7 8.40 5.0 103 94 94 -9 8 Amor Fati 2 55.5 8 20.10 0.0 92 98 98 +6 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | King Pelles | 122 | 122 | 102 | +20 | 5.0 | - | |
| 2 | Go Grayson Go | 95 | 95 | 95 | ✓ Match | 5.0 | - | |
| 3 | Isivivane Line | 98 | 104 | 98 | +6 | 5.0 | ||
| 4 | Down By The River | 95 | 95 | 102 | -7 | 0.0 | - | |
| 5 | Cape Eagle | 108 | 106 | 112 | -6 | 0.0 | - | |
| 6 | Trois Trois Quatre | 92 | 87 | 97 | -10 | 0.0 | - | |
| 7 | Gimmefabulous | 103 | 103 | 94 | +9 | 5.0 | - | |
| 8 | Amor Fati | 92 | 92 | 98 | -6 | 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