Official NHA Assessment
Race 6: TAB 4RACING APP PINNACLE STAKES (For all horses)
Line Horse
Bon Vivant
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
5 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Bohica 5 62.0 1 0.00 0.0 122 143 128 +6 2 Bon Vivant 3 52.0 2 1.20 9.5 104 104 104 +0 3 Bard Of Avon 3 52.0 3 4.20 9.5 100 104 104 +4 4 Vars Vicky 4 56.0 4 4.40 11.0 111 109 109 -2 5 Ikigai 8 54.0 5 5.60 0.0 104 127 127 +23 6 Litigation 3 52.0 6 6.35 9.5 101 104 104 +3 7 Quantum King 3 52.0 7 6.60 9.5 99 104 104 +5 8 Ultra Magnus 6 56.0 8 7.10 0.0 110 131 131 +21 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Bohica | 122 | 125 | 128 | -3 | 0.0 | - | |
| 2 | Bon Vivant Line | 104 | 96 | 104 | -8 | 9.5 | ||
| 3 | Bard Of Avon | 100 | 105 | 104 | +1 | 9.5 | - | |
| 4 | Vars Vicky | 111 | 116 | 109 | +7 | 11.0 | - | |
| 5 | Ikigai | 104 | 91 | 127 | -36 | 0.0 | - | |
| 6 | Litigation | 101 | 113 | 104 | +9 | 9.5 | - | |
| 7 | Quantum King | 99 | 99 | 104 | -5 | 9.5 | - | |
| 8 | Ultra Magnus | 110 | 98 | 131 | -33 | 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