Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY RACING MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Lily Of Orange
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
3 / 8
Within 2 points
Significant Diffs
4 / 8
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    Sugar Snap           3    60.0    1    0.00     8.0   54    56           56    +2
2    Graphene Aerogel     3    60.0    2    4.25     8.0   59    57           57    -2
3    Lily Of Orange       3    60.0    3    5.25     8.0   56    56           56    +0
4    Literal Image        2    58.0    4    5.30     0.0   51    68           68    +17
5    Magic Moments        3    60.0    5    8.55     8.0   56    56           56    +0
6    Marmellata           3    58.0    6    8.65     8.0   -     52           52    +52
7    Girl Scout           3    60.0    7    12.15    8.0   51    56           56    +5
8    Aunt Liberty         2    58.0    8    13.65    0.0   30    68           68    +38
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Sugar Snap 54 59 56 +3 8.0 -
2 Graphene Aerogel 59 59 57 +2 8.0 -
3 Lily Of Orange Line 56 55 56 -1 8.0
4 Literal Image 51 57 68 -11 0.0 -
5 Magic Moments 56 47 56 -9 8.0 -
6 Marmellata - - 52 -52 8.0 -
7 Girl Scout 51 54 56 -2 8.0 -
8 Aunt Liberty 30 38 68 -30 0.0 -
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