Official NHA Assessment

Race 7: OFF TO STUD STAKES (Listed) (4 years and older Fillies and Mares)

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Line Horse
Magical Flight
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
4 / 9
Within 2 points
Significant Diffs
3 / 9
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Emerald Princess     3    60.0    1    0.00     1.0   98    89           89    -9
2    Lucky Miss           3    55.5    2    0.25     1.0   83    80           80    -3
3    Queen Of Shadows     3    60.0    3    0.50     1.0   95    94           94    -1
4    Magical Flight       4    57.0    4    1.80     0.5   87    87           87    +0
5    Let's Not Linger     4    57.0    5    1.85     0.5   87    87           87    +0
6    Kailene              3    57.0    6    2.25     1.0   89    86           86    -3
7    Southern Cape        3    60.0    7    3.15     1.0   96    91           91    -5
8    Gardenia             5    54.0    8    4.45     0.0   77    79           79    +2
99   Sister Light         3    58.5    99   0.00     1.0   -     86           86    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Emerald Princess 98 98 89 +9 1.0 -
2 Lucky Miss 83 82 80 +2 1.0 -
3 Queen Of Shadows 95 95 94 +1 1.0 -
4 Magical Flight Line 87 85 87 -2 0.5
5 Let's Not Linger 87 87 87 ✓ Match 0.5 -
6 Kailene 89 79 86 -7 1.0 -
7 Southern Cape 96 96 91 +5 1.0 -
8 Gardenia 77 75 79 -4 0.0 -
99 Sister Light - 96 86 +10 1.0 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. 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