Official NHA Assessment

Race 1: MADIGAN BORROWDALE D STAKES 68 (For All Horses with a nett rating of 68 & below)

Line Horse
Duchess Of War
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
1 / 5
Within 2 points
Significant Diffs
2 / 5
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    My Secret Place      5    57.5    1    0.00     0.0   67    66           66    -1
2    Duchess Of War       2    54.5    2    3.00     0.0   62    62           62    +0
3    Bruce's Spirit       6    58.5    3    5.50     0.0   65    68           68    +3
4    Karvani              7    60.0    4    9.50     0.0   68    71           71    +3
5    New Galaxy           4    50.0    5    9.60     1.0   52    49           49    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 My Secret Place 67 71 66 +5 0.0 -
2 Duchess Of War Line 62 55 62 -7 0.0
3 Bruce's Spirit 65 55 68 -13 0.0 -
4 Karvani 68 73 71 +2 0.0 -
5 New Galaxy 52 45 49 -4 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