Official NHA Assessment

Race 4: RUFFIAN STAKES (Listed) (For 2 yo Fillies.R60 000 Win BSA Bonus Series)

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Line Horse
None identified
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
0 / 7
Within 2 points
Significant Diffs
7 / 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    River Queraress      2    60.0    1    0.00     3.0   -     -            -     +0
2    Magic Tycoon         2    55.0    2    3.00     3.0   -     -            -     +0
3    Show Time            2    58.0    3    3.50     3.0   -     -            -     +0
4    Zoom Lady            2    55.0    4    5.50     3.0   -     -            -     +0
5    Inevitable           2    55.0    5    9.00     3.0   -     -            -     +0
6    Fennec Fox           5    60.0    6    11.25    0.0   -     -            -     +0
7    More For Me          2    55.5    7    24.25    3.0   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 River Queraress - 88 - +88 3.0 -
2 Magic Tycoon - 74 - +74 3.0 -
3 Show Time - 75 - +75 3.0 -
4 Zoom Lady - 60 - +60 3.0 -
5 Inevitable - 74 - +74 3.0 -
6 Fennec Fox - 64 - +64 0.0 -
7 More For Me - 63 - +63 3.0 -
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