Official NHA Assessment

Race 1: www.tabgold.co.za QUALIFIED MAIDEN PLATE (Maidens with 3 runs or more & gross rating of 68 or less)

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Line Horse
Mccartney
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
8 / 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    Geronimo             4    60.0    1    0.00     10.0  58    65           64    +6
2    Mccartney            3    60.0    2    0.40     8.5   68    68           68    +0
3    Lord Edward          2    55.0    3    6.50     5.5   47    64           64    +17
4    King's Spear         4    60.0    4    11.90    10.0  60    65           65    +5
5    Easy Roy Easy        3    60.0    5    12.65    8.5   42    68           68    +26
6    Jessie Bay           2    54.0    6    13.75    5.5   57    62           62    +5
7    Lady Chocolat        2    56.5    7    13.95    5.5   62    67           67    +5
8    Ndabezitha           2    57.5    8    15.00    5.5   66    69           69    +3
99   Word For Word        3    57.5    99   0.00     8.5   -     63           63    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Geronimo 58 50 64 -14 10.0 -
2 Mccartney Line 68 54 68 -14 8.5
3 Lord Edward 47 52 64 -12 5.5 -
4 King's Spear 60 54 65 -11 10.0 -
5 Easy Roy Easy 42 37 68 -31 8.5 -
6 Jessie Bay 57 54 62 -8 5.5 -
7 Lady Chocolat 62 54 67 -13 5.5 -
8 Ndabezitha 66 59 69 -10 5.5 -
99 Word For Word - 62 63 -1 8.5 -
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