Official NHA Assessment
Race 4: CELEBRATING CENTURION MEMBER ASHWIN REYNOLDS' BIRTHDAY MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)
Line Horse
Diamond Bomber
Reference for assessment
Exact Matches
0 / 17
Calculated = Official
Close Matches
1 / 17
Within 2 points
Significant Diffs
14 / 17
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Lavender Bay 4 60.0 1 0.00 4.0 71 73 70 -1 2 Diamond Bomber 2 58.0 2 1.50 0.0 80 80 80 +0 3 White Waters 2 58.0 3 2.75 0.0 79 79 79 +0 4 Exquisite 3 58.0 4 3.25 7.0 77 65 67 -10 5 Hunga Tonga 3 58.0 5 5.00 7.0 72 63 63 -9 6 Lotus Island 2 58.0 6 5.50 0.0 80 77 77 -3 7 Meursault 3 58.0 7 7.00 7.0 72 63 63 -9 8 Strictly Private 3 58.0 8 7.50 7.0 - 63 63 +63 9 Hay Fever 2 58.0 9 8.75 0.0 - 77 77 +77 10 See The Sign 3 58.0 10 16.25 7.0 - 63 63 +63 11 Sky Diamond 2 58.0 11 16.30 0.0 - 77 77 +77 12 Royal Times 3 58.0 12 18.55 7.0 - 63 63 +63 99 Miss Pompeii 3 58.0 99 0.00 7.0 - 63 63 +0 99 Sweetsummerlove 2 58.0 99 0.00 0.0 - 77 77 +0 99 Ms Patty 3 58.0 99 0.00 7.0 - 63 63 +0 99 Cosmic Cliffs 3 58.0 99 0.00 7.0 - 63 63 +0 99 Bird On A Wing 3 58.0 99 0.00 7.0 - 63 63 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Lavender Bay | 71 | 95 | 70 | +25 | 4.0 | - | |
| 2 | Diamond Bomber Line | 80 | 79 | 80 | -1 | 0.0 | ||
| 3 | White Waters | 79 | 73 | 79 | -6 | 0.0 | - | |
| 4 | Exquisite | 77 | 83 | 67 | +16 | 7.0 | - | |
| 5 | Hunga Tonga | 72 | 78 | 63 | +15 | 7.0 | - | |
| 6 | Lotus Island | 80 | 93 | 77 | +16 | 0.0 | - | |
| 7 | Meursault | 72 | 76 | 63 | +13 | 7.0 | - | |
| 8 | Strictly Private | - | 68 | 63 | +5 | 7.0 | - | |
| 9 | Hay Fever | - | 54 | 77 | -23 | 0.0 | - | |
| 10 | See The Sign | - | 54 | 63 | -9 | 7.0 | - | |
| 11 | Sky Diamond | - | 50 | 77 | -27 | 0.0 | - | |
| 12 | Royal Times | - | 48 | 63 | -15 | 7.0 | - | |
| 99 | Miss Pompeii | - | - | 63 | -63 | 7.0 | - | |
| 99 | Sweetsummerlove | - | 58 | 77 | -19 | 0.0 | - | |
| 99 | Ms Patty | - | 76 | 63 | +13 | 7.0 | - | |
| 99 | Cosmic Cliffs | - | 67 | 63 | +4 | 7.0 | - | |
| 99 | Bird On A Wing | - | 57 | 63 | -6 | 7.0 | - |
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