Official NHA Assessment

Race 1: MAIDEN PLATE (Maiden Plate Colts & Geldings to carry)

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Line Horse
Bruce's Spirit
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
3 / 7
Within 2 points
Significant Diffs
3 / 7
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    Queen Of Dallas      3    54.5    1    0.00     2.5   49    39           39    -10
2    Bruce's Spirit       6    60.0    2    1.50     0.0   58    58           58    +0
3    Apache Gold          3    60.0    3    4.00     2.5   57    51           51    -6
4    Ginjamatinja         3    56.0    4    6.00     2.5   56    42           46    -10
5    Royal Obsession      3    60.0    5    7.75     2.5   -     50           50    +50
6    Ride The Lights      3    57.0    6    8.25     2.5   -     44           44    +44
99   Empress Of Jade      3    57.0    99   0.00     2.5   -     44           44    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Queen Of Dallas 49 40 39 +1 2.5 -
2 Bruce's Spirit Line 58 55 58 -3 0.0
3 Apache Gold 57 52 51 +1 2.5 -
4 Ginjamatinja 56 45 46 -1 2.5 -
5 Royal Obsession - 37 50 -13 2.5 -
6 Ride The Lights - 38 44 -6 2.5 -
99 Empress Of Jade - 73 44 +29 2.5 -
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