Official NHA Assessment

Race 1: DOWNLOAD THE RACE CARD ONLINE www.goldcircle.co.za MAIDEN PLATE (For all Maidens)

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Line Horse
Arbitrator
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 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    Addiena              3    57.5    1    0.00     9.5   59    69           65    +6
2    Arbitrator           2    58.0    2    3.60     6.5   76    76           76    +0
3    I've Got Wings       2    55.5    3    4.65     6.5   74    71           71    -3
4    Ndabezitha           2    56.5    4    7.85     6.5   74    73           73    -1
5    Corsican             2    58.0    5    8.05     6.5   -     76           76    +76
6    Quantifier           2    58.0    6    11.05    6.5   -     76           76    +76
7    Axel Collins         5    58.0    7    11.45    0.0   -     89           89    +89
8    Easy Roy Easy        3    60.0    8    15.45    9.5   -     74           74    +74
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Addiena 59 83 65 +18 9.5 -
2 Arbitrator Line 76 82 76 +6 6.5
3 I've Got Wings 74 68 71 -3 6.5 -
4 Ndabezitha 74 59 73 -14 6.5 -
5 Corsican - 61 76 -15 6.5 -
6 Quantifier - 74 76 -2 6.5 -
7 Axel Collins - 55 89 -34 0.0 -
8 Easy Roy Easy - 37 74 -37 9.5 -
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