Official NHA Assessment
Race 4: CITIZEN MAIDEN PLATE (A) (For all Maidens)
Line Horse
Secret Chord
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
9 / 10
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------ Pos Horse Age Weight Fin Lengths WFA Pre Race Rating New Adj ------------------------------------------------------------------------------------------------------------------------ 1 Sea Shanty 4 60.0 1 0.00 4.0 74 78 70 -4 2 Quick Trip 2 57.5 2 0.30 2.5 78 76 76 -2 3 So Seductive 2 57.5 3 1.00 2.5 85 76 76 -9 4 Secret Chord 4 60.0 4 3.00 4.0 78 78 78 +0 5 Trip To States 5 60.0 5 7.75 0.0 63 86 86 +23 6 Sacambaya 2 60.0 6 9.00 2.5 77 81 81 +4 7 Knockemstiff 2 60.0 7 12.75 2.5 71 81 81 +10 8 Winter In Africa 3 57.5 8 16.75 3.5 - 74 74 +74 9 Captain Jim 3 60.0 9 18.00 3.5 - 79 79 +79 10 Douglas Dragon 3 60.0 10 19.00 3.5 - 79 79 +79 ------------------------------------------------------------------------------------------------------------------------
Horse-by-Horse Comparison
| Pos | Horse | Pre-Rating | Official New | Calculated | Discrepancy | WFA (kg) | Line Horse | Calculation |
|---|---|---|---|---|---|---|---|---|
| 1 | Sea Shanty | 74 | 71 | 70 | +1 | 4.0 | - | |
| 2 | Quick Trip | 78 | 82 | 76 | +6 | 2.5 | - | |
| 3 | So Seductive | 85 | 89 | 76 | +13 | 2.5 | - | |
| 4 | Secret Chord Line | 78 | 92 | 78 | +14 | 4.0 | ||
| 5 | Trip To States | 63 | 63 | 86 | -23 | 0.0 | - | |
| 6 | Sacambaya | 77 | 72 | 81 | -9 | 2.5 | - | |
| 7 | Knockemstiff | 71 | 65 | 81 | -16 | 2.5 | - | |
| 8 | Winter In Africa | - | - | 74 | -74 | 3.5 | - | |
| 9 | Captain Jim | - | 54 | 79 | -25 | 3.5 | - | |
| 10 | Douglas Dragon | - | 89 | 79 | +10 | 3.5 | - |
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