Official NHA Assessment
Race 7: OPEN A TABGOLD ACCOUNT - 031 314 1874 MR 82 HANDICAP (Open)
Line Horse
Princekresh
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 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 Stanley Park 2 56.5 1 0.00 0.5 76 86 76 +0 2 Rafa's Boy 2 54.0 2 0.30 0.5 79 81 81 +2 3 Princekresh 4 53.5 3 1.50 2.0 77 77 77 +0 4 Trafalgar Square 6 52.0 4 2.40 0.0 66 78 78 +12 5 Gimme A Rainbow 4 57.0 5 3.10 2.0 76 84 84 +8 6 Honshu 2 55.5 6 4.60 0.5 88 84 84 -4 99 Chara Sands 3 58.5 99 0.00 1.5 - 88 88 +0 99 Dandolo 4 61.0 99 0.00 2.0 - 92 92 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Stanley Park | 76 | 69 | 76 | -7 | 0.5 | - | |
| 2 | Rafa's Boy | 79 | 79 | 81 | -2 | 0.5 | - | |
| 3 | Princekresh Line | 77 | 72 | 77 | -5 | 2.0 | ||
| 4 | Trafalgar Square | 66 | 69 | 78 | -9 | 0.0 | - | |
| 5 | Gimme A Rainbow | 76 | 74 | 84 | -10 | 2.0 | - | |
| 6 | Honshu | 88 | 71 | 84 | -13 | 0.5 | - | |
| 99 | Chara Sands | - | 70 | 88 | -18 | 1.5 | - | |
| 99 | Dandolo | - | 86 | 92 | -6 | 2.0 | - |
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