Official NHA Assessment
Race 8: #destinationcaperacing CLASS 4 (Open. Benchmark at 60.0kg = 78)
Line Horse
Bluff On Bluff
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
4 / 12
Within 2 points
Significant Diffs
6 / 12
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Speed Racer 4 60.5 1 0.00 3.5 83 78 78 -5 2 Bluff On Bluff 3 58.5 2 2.00 3.0 75 75 75 +0 3 The Tinkerman 3 59.5 3 3.25 3.0 77 77 77 +0 4 Trippi's Silk 4 57.5 4 3.45 3.5 77 72 72 -5 5 Go It Alone 4 61.0 5 3.50 3.5 84 79 79 -5 6 Dragonfly 3 58.5 6 4.25 3.0 75 75 75 +0 7 Explosive Speed 2 57.0 7 6.50 2.0 76 74 74 -2 8 Major Apollo 2 55.5 8 6.55 2.0 73 71 71 -2 9 Benjamin 4 59.5 9 9.80 3.5 77 76 76 -1 10 Kaapse Klopse 2 60.5 10 11.05 2.0 83 81 81 -2 11 William West 2 58.5 11 12.30 2.0 79 77 77 -2 99 Mighty Mac 5 59.0 99 0.00 0.0 - 82 82 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Speed Racer | 83 | 88 | 78 | +10 | 3.5 | - | |
| 2 | Bluff On Bluff Line | 75 | 80 | 75 | +5 | 3.0 | ||
| 3 | The Tinkerman | 77 | 76 | 77 | -1 | 3.0 | - | |
| 4 | Trippi's Silk | 77 | 73 | 72 | +1 | 3.5 | - | |
| 5 | Go It Alone | 84 | 69 | 79 | -10 | 3.5 | - | |
| 6 | Dragonfly | 75 | 71 | 75 | -4 | 3.0 | - | |
| 7 | Explosive Speed | 76 | 68 | 74 | -6 | 2.0 | - | |
| 8 | Major Apollo | 73 | 72 | 71 | +1 | 2.0 | - | |
| 9 | Benjamin | 77 | 75 | 76 | -1 | 3.5 | - | |
| 10 | Kaapse Klopse | 83 | 60 | 81 | -21 | 2.0 | - | |
| 11 | William West | 79 | 51 | 77 | -26 | 2.0 | - | |
| 99 | Mighty Mac | - | 52 | 82 | -30 | 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