Official NHA Assessment
Race 1: 4RACING WELCOMES YOU WORK RIDERS MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)
Line Horse
Rosslyne
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
1 / 13
Within 2 points
Significant Diffs
10 / 13
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Rosslyne 2 60.0 1 0.00 0.0 73 73 73 +0 2 Impression 3 60.0 2 3.00 5.0 - 65 65 +65 3 Miss Christmas 3 60.0 3 4.30 5.0 - 63 63 +63 4 Queen Britanna 2 60.0 4 6.00 0.0 65 73 73 +8 5 Glittering Boots 3 60.0 5 13.25 5.0 64 63 63 -1 6 Elusive Fire 4 60.0 6 14.00 2.5 53 68 68 +15 7 More For Me 2 60.0 7 14.30 0.0 73 73 73 +0 8 Cantfoolme 2 60.0 8 14.55 0.0 69 73 73 +4 9 Coffee In Brazil 3 60.0 9 24.80 5.0 50 63 63 +13 10 United's Ransom 3 60.0 10 99.99 5.0 - 63 63 +63 11 Pink Diamond 6 60.0 11 99.99 0.0 57 73 73 +16 99 A Touch Of Sugar 2 60.0 99 0.00 0.0 - 73 73 +0 99 Broadlands 3 60.0 99 0.00 5.0 - 63 63 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Rosslyne Line | 73 | 58 | 73 | -15 | 0.0 | ||
| 2 | Impression | - | 51 | 65 | -14 | 5.0 | - | |
| 3 | Miss Christmas | - | 64 | 63 | +1 | 5.0 | - | |
| 4 | Queen Britanna | 65 | 57 | 73 | -16 | 0.0 | - | |
| 5 | Glittering Boots | 64 | 52 | 63 | -11 | 5.0 | - | |
| 6 | Elusive Fire | 53 | 63 | 68 | -5 | 2.5 | - | |
| 7 | More For Me | 73 | 63 | 73 | -10 | 0.0 | - | |
| 8 | Cantfoolme | 69 | 51 | 73 | -22 | 0.0 | - | |
| 9 | Coffee In Brazil | 50 | 49 | 63 | -14 | 5.0 | - | |
| 10 | United's Ransom | - | 59 | 63 | -4 | 5.0 | - | |
| 11 | Pink Diamond | 57 | 60 | 73 | -13 | 0.0 | - | |
| 99 | A Touch Of Sugar | - | 58 | 73 | -15 | 0.0 | - | |
| 99 | Broadlands | - | 69 | 63 | +6 | 5.0 | - |
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