Official NHA Assessment

Race 2: WSB.co.za IRRIDESCENCE STAKES (Listed) (For 2 yof R60 000 Win BSA Bonus Series)

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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
9 / 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    Bonika               2    60.0    1    0.00     0.0   -     -            -     +0
2    Miss Marguerite      5    60.0    2    0.05     0.0   -     -            -     +0
3    Ciao Bella           2    60.0    3    1.80     0.0   -     -            -     +0
4    Fun Zone             5    60.0    4    3.05     0.0   -     -            -     +0
5    Call Me The Breeze   2    60.0    5    3.15     0.0   -     -            -     +0
6    Spywing              2    60.0    6    3.25     0.0   -     -            -     +0
7    Pucallpa             2    60.0    7    6.00     0.0   -     -            -     +0
8    Lady Mistico         2    60.0    8    6.30     0.0   -     -            -     +0
9    Camille Claudel      2    60.0    9    11.80    0.0   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bonika - 80 - +80 0.0 -
2 Miss Marguerite - 91 - +91 0.0 -
3 Ciao Bella - 110 - +110 0.0 -
4 Fun Zone - 96 - +96 0.0 -
5 Call Me The Breeze - 63 - +63 0.0 -
6 Spywing - 85 - +85 0.0 -
7 Pucallpa - 70 - +70 0.0 -
8 Lady Mistico - 75 - +75 0.0 -
9 Camille Claudel - 69 - +69 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