Official NHA Assessment
Race 1: GrandSlots WORK RIDERS' MAIDEN PLATE (For all Maidens)
Line Horse
Casino Ace
Reference for assessment
Exact Matches
1 / 16
Calculated = Official
Close Matches
4 / 16
Within 2 points
Significant Diffs
9 / 16
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Escarpment 4 62.0 1 0.00 7.0 - 54 6 +6 2 Riverstone 2 62.0 2 0.75 4.0 - 60 60 +60 3 Casino Ace 5 62.0 3 1.25 0.0 68 68 68 +0 4 Always Free 2 62.0 4 3.00 4.0 - 60 60 +60 5 Captain Cool 3 60.5 5 3.50 6.0 72 53 62 -10 6 Gimme's Captain 3 62.0 6 3.80 6.0 - 56 56 +56 7 Tom's Diner 4 62.0 7 5.55 7.0 - 54 54 +54 8 Snow Cloud 3 60.5 8 7.30 6.0 60 53 53 -7 9 J Roops 2 60.5 9 7.50 4.0 - 57 57 +57 10 Red Skyline 3 62.0 10 7.70 6.0 - 56 56 +56 11 Winning Captain 3 62.0 11 8.00 6.0 64 56 56 -8 12 Land Of Heaven 2 62.0 12 9.75 4.0 - 60 60 +60 13 Isiphekepheke 2 62.0 13 10.25 4.0 64 60 60 -4 14 Newton Heath 3 62.0 14 10.35 6.0 67 56 57 -10 99 Black Hole Sun 4 59.5 99 0.00 7.0 - 49 49 +0 99 Teresa Mendoza 3 59.5 99 0.00 6.0 - 51 51 +0 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Escarpment | - | 79 | 6 | +73 | 7.0 | - | |
| 2 | Riverstone | - | 84 | 60 | +24 | 4.0 | - | |
| 3 | Casino Ace Line | 68 | 56 | 68 | -12 | 0.0 | ||
| 4 | Always Free | - | - | 60 | -60 | 4.0 | - | |
| 5 | Captain Cool | 72 | 72 | 62 | +10 | 6.0 | - | |
| 6 | Gimme's Captain | - | 66 | 56 | +10 | 6.0 | - | |
| 7 | Tom's Diner | - | 94 | 54 | +40 | 7.0 | - | |
| 8 | Snow Cloud | 60 | 58 | 53 | +5 | 6.0 | - | |
| 9 | J Roops | - | 58 | 57 | +1 | 4.0 | - | |
| 10 | Red Skyline | - | 62 | 56 | +6 | 6.0 | - | |
| 11 | Winning Captain | 64 | 54 | 56 | -2 | 6.0 | - | |
| 12 | Land Of Heaven | - | 58 | 60 | -2 | 4.0 | - | |
| 13 | Isiphekepheke | 64 | 60 | 60 | ✓ Match | 4.0 | - | |
| 14 | Newton Heath | 67 | 60 | 57 | +3 | 6.0 | - | |
| 99 | Black Hole Sun | - | 53 | 49 | +4 | 7.0 | - | |
| 99 | Teresa Mendoza | - | 59 | 51 | +8 | 6.0 | - |
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