Official NHA Assessment

Race 1: THE BUY A RACEHORSE MAIDEN PLATE (Maiden Plate Colts & Geldings to carry)

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Line Horse
Emma Of Normandy
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
1 / 6
Within 2 points
Significant Diffs
3 / 6
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    Emma Of Normandy     2    57.5    1    0.00     0.0   40    40           40    +0
2    Silent Power         3    57.0    2    0.50     2.5   -     39           39    +39
3    Jumped A Red         2    57.0    3    4.00     0.0   38    40           40    +2
4    Hartenbos            2    57.0    4    4.25     0.0   28    40           40    +12
5    Simon's World        3    60.0    5    14.25    2.5   -     40           40    +40
99   Dark Future          2    57.0    99   0.00     0.0   -     39           39    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Emma Of Normandy Line 40 44 40 +4 0.0
2 Silent Power - 42 39 +3 2.5 -
3 Jumped A Red 38 42 40 +2 0.0 -
4 Hartenbos 28 47 40 +7 0.0 -
5 Simon's World - - 40 -40 2.5 -
99 Dark Future - 49 39 +10 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