Official NHA Assessment

Race 1: www.goldcircle.co.za MAIDEN PLATE (F & M) (For Maiden Fillies & Mares)

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Line Horse
Lady Macbeth
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
6 / 8
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    Corner Crusade       3    57.5    1    0.00     5.0   69    62           62    -7
2    Lady Macbeth         3    60.0    2    1.80     5.0   67    67           67    +0
3    Vision Of Will       3    60.0    3    2.20     5.0   69    67           67    -2
4    Nkalanzinzi          3    60.0    4    2.80     5.0   69    67           67    -2
5    Reginas Angel        4    60.0    5    2.85     6.0   60    65           65    +5
6    Perfect Appeal       3    60.0    6    10.65    5.0   68    67           67    -1
7    Broadway Calling     3    60.0    7    16.95    5.0   -     67           67    +67
99   Austen               4    60.0    99   0.00     6.0   -     65           65    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Corner Crusade 69 52 62 -10 5.0 -
2 Lady Macbeth Line 67 68 67 +1 5.0
3 Vision Of Will 69 66 67 -1 5.0 -
4 Nkalanzinzi 69 50 67 -17 5.0 -
5 Reginas Angel 60 49 65 -16 6.0 -
6 Perfect Appeal 68 58 67 -9 5.0 -
7 Broadway Calling - - 67 -67 5.0 -
99 Austen - 50 65 -15 6.0 -
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