Official NHA Assessment
Race 1: WSB WELCOMES YOU MAIDEN PLATE (F & M) (For Maiden F&M. R15 000 Win bonus ROA Members)
Line Horse
None identified
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
0 / 12
Within 2 points
Significant Diffs
11 / 12
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Antigua Night 2 57.0 1 0.00 1.0 - - - +0 2 Arilena 6 60.0 2 0.75 0.0 - - - +0 3 Silver Mensa 2 57.0 3 2.00 1.0 - - - +0 4 Bird In Space 2 57.0 4 3.00 1.0 - - - +0 5 Simply Magic 3 60.0 5 5.50 2.0 65 - 61 -4 6 Wilkies 2 55.5 6 6.25 1.0 - - - +0 7 Lunar Ballade 3 60.0 7 6.50 2.0 - - - +0 8 Silver Clock 2 55.5 8 7.25 1.0 - - - +0 9 Montana Nymph 2 57.0 9 19.25 1.0 - - - +0 10 Mrs Shelby 2 57.0 10 20.50 1.0 - - - +0 11 Tiny Dancer 2 57.0 11 30.00 1.0 - - - +0 99 In The Ether 6 60.0 99 0.00 0.0 - - - +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Antigua Night | - | 97 | - | +97 | 1.0 | - | |
| 2 | Arilena | - | 75 | - | +75 | 0.0 | - | |
| 3 | Silver Mensa | - | 77 | - | +77 | 1.0 | - | |
| 4 | Bird In Space | - | 66 | - | +66 | 1.0 | - | |
| 5 | Simply Magic | 65 | 67 | 61 | +6 | 2.0 | - | |
| 6 | Wilkies | - | 50 | - | +50 | 1.0 | - | |
| 7 | Lunar Ballade | - | 72 | - | +72 | 2.0 | - | |
| 8 | Silver Clock | - | 67 | - | +67 | 1.0 | - | |
| 9 | Montana Nymph | - | 57 | - | +57 | 1.0 | - | |
| 10 | Mrs Shelby | - | 50 | - | +50 | 1.0 | - | |
| 11 | Tiny Dancer | - | 35 | - | +35 | 1.0 | - | |
| 99 | In The Ether | - | 63 | - | - | 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