Official NHA Assessment
Race 6: TAB 4RACING APP PINNACLE STAKES (For all horses)
Line Horse
Guy Gibson
Reference for assessment
Exact Matches
1 / 6
Calculated = Official
Close Matches
2 / 6
Within 2 points
Significant Diffs
3 / 6
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Fairy Knight 4 62.0 1 0.00 2.0 118 103 103 -15 2 Guy Gibson 2 58.0 2 0.10 0.0 99 99 99 +0 3 Cheeky Laddie 5 55.0 3 0.60 0.0 85 98 98 +13 4 Pas De Nom 2 56.5 4 1.85 0.0 91 99 99 +8 5 Champonelle 4 55.0 5 2.60 2.0 88 91 91 +3 6 Usa's Hope 2 58.0 6 10.35 0.0 98 99 99 +1 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Fairy Knight | 118 | 118 | 103 | +15 | 2.0 | - | |
| 2 | Guy Gibson Line | 99 | 99 | 99 | ✓ Match | 0.0 | ||
| 3 | Cheeky Laddie | 85 | 87 | 98 | -11 | 0.0 | - | |
| 4 | Pas De Nom | 91 | 91 | 99 | -8 | 0.0 | - | |
| 5 | Champonelle | 88 | 87 | 91 | -4 | 2.0 | - | |
| 6 | Usa's Hope | 98 | 97 | 99 | -2 | 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