Official NHA Assessment

Race 4: WILGERBOSDRIFT RUFFIAN STAKES (Listed) (For 2 yof R100 000 Win BSA / CRS Bonus)

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Line Horse
None identified
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
0 / 9
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    Secretary Bird       2    60.0    1    0.00     2.5   -     -            -     +0
2    Griselda             2    60.0    2    2.25     2.5   -     -            -     +0
3    Lanzarote            2    57.0    3    2.75     2.5   -     -            -     +0
4    Staggerwing          2    57.0    4    3.50     2.5   -     -            -     +0
5    Custodian            2    60.0    5    6.50     2.5   -     -            -     +0
6    Impressive           2    57.0    6    7.50     2.5   -     -            -     +0
7    Northern European    2    57.0    7    8.75     2.5   -     -            -     +0
8    Hoc Est Vita         2    57.0    8    15.50    2.5   -     -            -     +0
99   Queen Leila          2    60.0    99   0.00     2.5   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Secretary Bird - - - - 2.5 -
2 Griselda - - - - 2.5 -
3 Lanzarote - - - - 2.5 -
4 Staggerwing - - - - 2.5 -
5 Custodian - - - - 2.5 -
6 Impressive - - - - 2.5 -
7 Northern European - - - - 2.5 -
8 Hoc Est Vita - - - - 2.5 -
99 Queen Leila - - - - 2.5 -
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