Official NHA Assessment
Race 1: TRACK AND BALL GAMING MAIDEN PLATE (For all Maidens)
Line Horse
Plettenberg
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
7 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Plettenberg 3 58.5 1 0.00 3.5 74 74 74 +0 2 Rototo 3 60.0 2 0.40 3.5 - 77 77 +77 3 Hoodwinked 3 60.0 3 0.65 3.5 - 77 77 +77 4 Red Mountain 4 60.0 4 0.95 4.0 78 76 76 -2 5 Nantes Festival 2 60.0 5 1.95 2.5 66 79 79 +13 6 Evies Horizon 2 60.0 6 2.25 2.5 - 79 79 +79 7 Summer Shade 4 60.0 7 6.05 4.0 68 76 76 +8 99 Apex Predator 4 60.0 99 0.00 4.0 - 76 76 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Plettenberg Line | 74 | 59 | 74 | -15 | 3.5 | ||
| 2 | Rototo | - | 61 | 77 | -16 | 3.5 | - | |
| 3 | Hoodwinked | - | 67 | 77 | -10 | 3.5 | - | |
| 4 | Red Mountain | 78 | 77 | 76 | +1 | 4.0 | - | |
| 5 | Nantes Festival | 66 | 51 | 79 | -28 | 2.5 | - | |
| 6 | Evies Horizon | - | 63 | 79 | -16 | 2.5 | - | |
| 7 | Summer Shade | 68 | 52 | 76 | -24 | 4.0 | - | |
| 99 | Apex Predator | - | 69 | 76 | -7 | 4.0 | - |
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