Official NHA Assessment
Race 6: BETWAY MR 81 DIVIDEND HANDICAP (Open)
Line Horse
Royal Edition
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
8 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Willow Express 7 57.5 1 0.00 0.0 76 86 76 +0 2 Quatermain 2 59.5 2 0.75 0.0 80 94 94 +14 3 Royal Edition 4 60.0 3 2.00 6.0 82 82 82 +0 4 Black Lightning 2 55.0 4 7.00 0.0 71 81 81 +10 5 Circle Of Grace 4 57.0 5 16.50 6.0 76 73 73 -3 99 Gimmeachoice 3 58.5 99 0.00 8.5 - 71 71 +0 99 Chestnut Bomber 3 57.0 99 0.00 8.5 - 68 68 +0 99 Archimides 3 54.5 99 0.00 8.5 - 63 63 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Willow Express | 76 | 82 | 76 | +6 | 0.0 | - | |
| 2 | Quatermain | 80 | 79 | 94 | -15 | 0.0 | - | |
| 3 | Royal Edition Line | 82 | 92 | 82 | +10 | 6.0 | ||
| 4 | Black Lightning | 71 | 64 | 81 | -17 | 0.0 | - | |
| 5 | Circle Of Grace | 76 | 51 | 73 | -22 | 6.0 | - | |
| 99 | Gimmeachoice | - | 87 | 71 | +16 | 8.5 | - | |
| 99 | Chestnut Bomber | - | 90 | 68 | +22 | 8.5 | - | |
| 99 | Archimides | - | 70 | 63 | +7 | 8.5 | - |
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