Official NHA Assessment
Race 5: BOOK FOR CLASSIC DAY 1 MARCH MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)
Line Horse
Prolific Star
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
6 / 10
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Page Boy 3 60.0 1 0.00 4.0 66 67 67 +1 2 Chieftain's Shield 4 60.0 2 6.00 2.0 66 71 71 +5 3 Sovereign Crown 3 60.0 3 6.50 4.0 70 67 67 -3 4 Prolific Star 3 60.0 4 7.00 4.0 67 67 67 +0 5 Brigham 3 60.0 5 8.00 4.0 68 67 67 -1 6 Mystic Vision 3 60.0 6 18.25 4.0 74 67 67 -7 7 Kissing Master 3 60.0 7 18.50 4.0 - 67 67 +67 8 Knight's Fire 3 60.0 8 20.75 4.0 60 67 67 +7 9 Eratosthenes 3 60.0 9 32.00 4.0 - 67 67 +67 10 Ragamuffin 2 60.0 10 99.99 0.0 46 75 75 +29 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Page Boy | 66 | 79 | 67 | +12 | 4.0 | - | |
| 2 | Chieftain's Shield | 66 | 80 | 71 | +9 | 2.0 | - | |
| 3 | Sovereign Crown | 70 | 68 | 67 | +1 | 4.0 | - | |
| 4 | Prolific Star Line | 67 | 64 | 67 | -3 | 4.0 | ||
| 5 | Brigham | 68 | 74 | 67 | +7 | 4.0 | - | |
| 6 | Mystic Vision | 74 | 66 | 67 | -1 | 4.0 | - | |
| 7 | Kissing Master | - | 39 | 67 | -28 | 4.0 | - | |
| 8 | Knight's Fire | 60 | 60 | 67 | -7 | 4.0 | - | |
| 9 | Eratosthenes | - | 63 | 67 | -4 | 4.0 | - | |
| 10 | Ragamuffin | 46 | 45 | 75 | -30 | 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