Official NHA Assessment

Race 4: www.caperacing.co.za MAIDEN SPECIAL WEIGHTS (For all Maidens)

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Line Horse
Donder Storm
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
3 / 7
Within 2 points
Significant Diffs
3 / 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    Innamorare           5    56.0    1    0.00     0.0   -     60           6     +6
2    Donder Storm         3    57.0    2    1.75     0.5   64    64           64    +0
3    Admiral's Ransom     3    55.5    3    1.95     0.5   61    61           61    +0
4    Double Duet          3    59.0    4    5.45     0.5   68    65           65    -3
5    Barnbougle           3    60.0    5    10.45    0.5   -     67           67    +67
99   Sudden Song          3    59.0    99   0.00     0.5   -     65           65    +0
99   Forever Bill         3    54.0    99   0.00     0.5   -     55           55    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Innamorare - 91 6 +85 0.0 -
2 Donder Storm Line 64 63 64 -1 0.5
3 Admiral's Ransom 61 48 61 -13 0.5 -
4 Double Duet 68 62 65 -3 0.5 -
5 Barnbougle - 66 67 -1 0.5 -
99 Sudden Song - 71 65 +6 0.5 -
99 Forever Bill - 56 55 +1 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