Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY MAIDEN PLATE (For all Maidens)

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Line Horse
Maradiva
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
3 / 9
Within 2 points
Significant Diffs
3 / 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    Maradiva             3    60.0    1    0.00     9.5   62    62           62    +0
2    Seismic Event        2    58.0    2    2.50     6.5   70    64           64    -6
3    Globetonic           6    60.0    3    5.00     0.0   -     81           81    +81
4    Nairobi              3    55.5    4    7.50     9.5   -     53           53    +53
5    Jackson Misissippi   6    60.0    5    8.00     0.0   53    81           81    +28
6    Dog Detachment       4    60.0    6    8.05     11.0  59    59           59    +0
7    Peronzada            3    57.5    7    12.30    9.5   43    57           57    +14
99   Miss United States   3    57.5    99   0.00     9.5   -     57           57    +0
99   Potente              2    58.0    99   0.00     6.5   -     64           64    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Maradiva Line 62 54 62 -8 9.5
2 Seismic Event 70 70 64 +6 6.5 -
3 Globetonic - 77 81 -4 0.0 -
4 Nairobi - 53 53 ✓ Match 9.5 -
5 Jackson Misissippi 53 58 81 -23 0.0 -
6 Dog Detachment 59 60 59 +1 11.0 -
7 Peronzada 43 56 57 -1 9.5 -
99 Miss United States - 52 57 -5 9.5 -
99 Potente - 60 64 -4 6.5 -
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