Official NHA Assessment
Race 7: JONSSON WORKWEAR COMPUTAFORM SPRINT (Grade 1) (For all horses at Weight for Age)
Line Horse
Thunderstruck
Reference for assessment
Exact Matches
1 / 12
Calculated = Official
Close Matches
2 / 12
Within 2 points
Significant Diffs
8 / 12
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Thunderstruck 2 60.0 1 0.00 2.0 124 124 124 +0 2 Golden Sickle 4 55.5 2 0.30 3.5 122 112 112 -10 3 Rulership 2 60.0 3 2.00 2.0 115 124 124 +9 4 Kiss Me Captain 2 57.5 4 3.25 2.0 110 119 119 +9 5 Iphiko 3 57.5 5 3.45 3.0 108 117 117 +9 6 Ziyasha 2 58.0 6 3.50 2.0 114 120 120 +6 7 Pray For Rain 4 60.0 7 4.25 3.5 114 121 121 +7 8 Mover And Shaker 5 60.0 8 6.00 0.0 118 128 128 +10 9 Dyce 6 60.0 9 7.75 0.0 130 128 128 -2 10 Ready To Charge 2 58.0 10 19.00 2.0 108 120 120 +12 99 Sheldon 6 60.0 99 0.00 0.0 - 128 128 +0 99 William Robertson 6 60.0 99 0.00 0.0 - 128 128 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Thunderstruck Line | 124 | 128 | 124 | +4 | 2.0 | ||
| 2 | Golden Sickle | 122 | 121 | 112 | +9 | 3.5 | - | |
| 3 | Rulership | 115 | 118 | 124 | -6 | 2.0 | - | |
| 4 | Kiss Me Captain | 110 | 112 | 119 | -7 | 2.0 | - | |
| 5 | Iphiko | 108 | 111 | 117 | -6 | 3.0 | - | |
| 6 | Ziyasha | 114 | 118 | 120 | -2 | 2.0 | - | |
| 7 | Pray For Rain | 114 | 106 | 121 | -15 | 3.5 | - | |
| 8 | Mover And Shaker | 118 | 109 | 128 | -19 | 0.0 | - | |
| 9 | Dyce | 130 | 128 | 128 | ✓ Match | 0.0 | - | |
| 10 | Ready To Charge | 108 | 110 | 120 | -10 | 2.0 | - | |
| 99 | Sheldon | - | 106 | 128 | -22 | 0.0 | - | |
| 99 | William Robertson | - | 124 | 128 | -4 | 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