Official NHA Assessment

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

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Line Horse
Midnight Cowboy
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
4 / 8
Within 2 points
Significant Diffs
3 / 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    Just The Wind        4    57.5    1    0.00     2.5   54    60           60    +6
2    Stay The Course      4    60.0    2    0.10     2.5   62    65           65    +3
3    Grace Lightning      3    57.5    3    3.10     4.0   65    59           59    -6
4    Midnight Cowboy      3    60.0    4    5.35     4.0   62    62           62    +0
5    Jack's Jamboree      3    60.0    5    7.10     4.0   58    62           62    +4
6    Jackbequick          4    60.0    6    8.10     2.5   64    65           65    +1
7    All Swagger          3    60.0    7    14.85    4.0   59    62           62    +3
8    Irish Sea            3    56.0    8    16.10    4.0   63    54           54    -9
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Just The Wind 54 51 60 -9 2.5 -
2 Stay The Course 62 67 65 +2 2.5 -
3 Grace Lightning 65 60 59 +1 4.0 -
4 Midnight Cowboy Line 62 62 62 ✓ Match 4.0
5 Jack's Jamboree 58 55 62 -7 4.0 -
6 Jackbequick 64 62 65 -3 2.5 -
7 All Swagger 59 54 62 -8 4.0 -
8 Irish Sea 63 52 54 -2 4.0 -
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