Official NHA Assessment
Race 8: BETWAY MR 66 HANDICAP (Open)
Line Horse
Written In Stone
Reference for assessment
Exact Matches
1 / 15
Calculated = Official
Close Matches
4 / 15
Within 2 points
Significant Diffs
8 / 15
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Arilena 6 58.0 1 0.00 0.0 67 62 67 +0 2 Prized Platinum 3 56.5 2 2.20 8.5 59 42 49 -10 3 Written In Stone 9 58.5 3 2.25 0.0 63 63 63 +0 4 Samoa 10 57.0 4 3.00 0.0 60 60 60 +0 5 Life Goes On 7 56.5 5 4.25 0.0 59 59 59 +0 6 After Hours 7 58.0 6 4.35 0.0 62 62 62 +0 7 Jet Cat 9 57.0 7 4.75 0.0 60 60 60 +0 8 Inafix 4 58.0 8 5.65 10.0 62 42 52 -10 9 Green Sceptre 2 52.0 9 5.75 5.5 50 39 40 -10 10 Phala Millions 4 60.5 10 8.00 10.0 67 47 57 -10 11 Red Knot 4 62.0 11 9.00 10.0 70 50 60 -10 12 Ashanti Sword 2 54.5 12 10.00 5.5 55 44 45 -10 13 Miraculous Man 3 52.0 13 13.00 8.5 48 33 38 -10 99 Samthewiseman 5 52.0 99 0.00 0.0 - 50 50 +0 99 Bridge Of Spies 6 52.0 99 0.00 0.0 - 50 50 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Arilena | 67 | 75 | 67 | +8 | 0.0 | - | |
| 2 | Prized Platinum | 59 | 72 | 49 | +23 | 8.5 | - | |
| 3 | Written In Stone Line | 63 | 67 | 63 | +4 | 0.0 | ||
| 4 | Samoa | 60 | 64 | 60 | +4 | 0.0 | - | |
| 5 | Life Goes On | 59 | 54 | 59 | -5 | 0.0 | - | |
| 6 | After Hours | 62 | 79 | 62 | +17 | 0.0 | - | |
| 7 | Jet Cat | 60 | 60 | 60 | ✓ Match | 0.0 | - | |
| 8 | Inafix | 62 | 69 | 52 | +17 | 10.0 | - | |
| 9 | Green Sceptre | 50 | 50 | 40 | +10 | 5.5 | - | |
| 10 | Phala Millions | 67 | 66 | 57 | +9 | 10.0 | - | |
| 11 | Red Knot | 70 | 62 | 60 | +2 | 10.0 | - | |
| 12 | Ashanti Sword | 55 | 52 | 45 | +7 | 5.5 | - | |
| 13 | Miraculous Man | 48 | 45 | 38 | +7 | 8.5 | - | |
| 99 | Samthewiseman | - | 52 | 50 | +2 | 0.0 | - | |
| 99 | Bridge Of Spies | - | 48 | 50 | -2 | 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