Official NHA Assessment

Race 6: MIDDLE STAKES (92) (For horses with nett rating of 92 and below)

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Line Horse
True Beauty
Reference for assessment
Exact Matches
0 / 4
Calculated = Official
Close Matches
1 / 4
Within 2 points
Significant Diffs
3 / 4
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    True Beauty          4    57.0    1    0.00     1.5   90    90           90    +0
2    Only Him             4    60.0    2    0.50     1.5   92    101          101   +9
3    Seven Seas           5    55.0    3    2.50     0.0   85    91           91    +6
4    Armstrong            6    60.0    4    6.00     0.0   90    99           99    +9
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 True Beauty Line 90 99 90 +9 1.5
2 Only Him 92 87 101 -14 1.5 -
3 Seven Seas 85 90 91 -1 0.0 -
4 Armstrong 90 89 99 -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