Official NHA Assessment
Race 1: TRACK AND BALL GAMING MAIDEN PLATE (F & M) (For Maiden Fillies & Mares)
Line Horse
Head Girl
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
6 / 8
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Quentasia 4 60.0 1 0.00 7.0 75 50 50 -25 2 Head Girl 5 60.0 2 1.80 0.0 64 64 64 +0 3 Grecian Palace 2 58.5 3 2.20 4.0 70 53 60 -10 4 Littleblackvelvet 4 56.0 4 3.40 7.0 70 42 60 -10 5 Roys' Daisy 6 60.0 5 14.20 0.0 - 64 64 +64 6 Roy's Oyster 6 60.0 6 20.30 0.0 - 64 64 +64 7 Roy's Trump 4 60.0 7 20.50 7.0 - 50 50 +50 99 Dressedtothenines 4 60.0 99 0.00 7.0 - 50 50 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Quentasia | 75 | 58 | 50 | +8 | 7.0 | - | |
| 2 | Head Girl Line | 64 | 62 | 64 | -2 | 0.0 | ||
| 3 | Grecian Palace | 70 | 62 | 60 | +2 | 4.0 | - | |
| 4 | Littleblackvelvet | 70 | 77 | 60 | +17 | 7.0 | - | |
| 5 | Roys' Daisy | - | 39 | 64 | -25 | 0.0 | - | |
| 6 | Roy's Oyster | - | 20 | 64 | -44 | 0.0 | - | |
| 7 | Roy's Trump | - | 10 | 50 | -40 | 7.0 | - | |
| 99 | Dressedtothenines | - | 66 | 50 | +16 | 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