Official NHA Assessment

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

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Line Horse
Firefly Lane
Reference for assessment
Exact Matches
1 / 6
Calculated = Official
Close Matches
3 / 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    Princess Lucy        3    57.5    1    0.00     5.0   -     41           6     +6
2    Robin Of Locksley    3    60.0    2    1.25     5.0   -     46           46    +46
3    Firefly Lane         2    57.5    3    3.00     3.5   44    44           44    +0
4    Hidden Wonder        3    57.5    4    4.75     5.0   -     41           41    +41
5    Exodus Song          2    57.5    5    4.80     3.5   45    44           44    -1
6    Queen Of Montmatre   3    57.5    6    5.55     5.0   -     41           41    +41
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Princess Lucy - 52 6 +46 5.0 -
2 Robin Of Locksley - 75 46 +29 5.0 -
3 Firefly Lane Line 44 44 44 ✓ Match 3.5
4 Hidden Wonder - - 41 -41 5.0 -
5 Exodus Song 45 43 44 -1 3.5 -
6 Queen Of Montmatre - 39 41 -2 5.0 -
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