Official NHA Assessment
Race 2: MATCH WINNER BORROWDALE D STAKES 68 (For All Horses with a nett rating of 68 & below)
Line Horse
Jet Green
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
0 / 5
Within 2 points
Significant Diffs
5 / 5
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 King's Crown 3 55.5 1 0.00 5.0 68 53 53 -15 2 Jet Green 4 54.5 2 0.50 2.5 61 61 61 +0 3 Copper Fire 3 50.0 3 1.75 5.0 62 45 52 -10 4 Bruce's Spirit 6 60.0 4 2.00 0.0 66 75 75 +9 5 New Galaxy 4 53.0 5 3.25 2.5 58 55 55 -3 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | King's Crown | 68 | 79 | 53 | +26 | 5.0 | - | |
| 2 | Jet Green Line | 61 | 54 | 61 | -7 | 2.5 | ||
| 3 | Copper Fire | 62 | 60 | 52 | +8 | 5.0 | - | |
| 4 | Bruce's Spirit | 66 | 55 | 75 | -20 | 0.0 | - | |
| 5 | New Galaxy | 58 | 45 | 55 | -10 | 2.5 | - |
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