Official NHA Assessment

Race 2: BORROWDALE D STAKES 68 (For All Horses with a nett rating of 68 & below)

Line Horse
Prince Of Denmark
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    Copper Fire          3    56.0    1    0.00     0.5   64    56           56    -8
2    Audacious            2    57.5    2    3.00     0.0   66    62           62    -4
3    Prince Of Denmark    4    60.0    3    4.75     0.5   64    64           64    +0
4    Blazing Sky          3    53.5    4    5.25     0.5   59    51           51    -8
5    Forever Royal        4    50.0    5    5.50     0.5   47    44           44    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Copper Fire 64 60 56 +4 0.5 -
2 Audacious 66 61 62 -1 0.0 -
3 Prince Of Denmark Line 64 51 64 -13 0.5
4 Blazing Sky 59 46 51 -5 0.5 -
5 Forever Royal 47 36 44 -8 0.5 -
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