Official NHA Assessment

Race 1: www.goldcircle.co.za MAIDEN PLATE (For all Maidens)

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Line Horse
Guy Fox
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
7 / 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    Guy Fox              4    60.0    1    0.00     6.0   57    57           57    +0
2    Winter Journey       3    53.5    2    0.40     5.0   70    46           60    -10
3    A Kings Return       3    60.0    3    3.40     5.0   62    59           59    -3
4    Shot Of Courage      3    60.0    4    4.50     5.0   55    59           59    +4
5    Quick Response       3    60.0    5    6.20     5.0   -     59           59    +59
6    Whats Going On Roy   3    60.0    6    20.30    5.0   -     59           59    +59
99   Easy Roy Easy        3    58.5    99   0.00     5.0   -     56           56    +0
99   La Fille             3    57.5    99   0.00     5.0   -     54           54    +0
99   Vision Of Will       3    57.5    99   0.00     5.0   -     54           54    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Guy Fox Line 57 49 57 -8 6.0
2 Winter Journey 70 50 60 -10 5.0 -
3 A Kings Return 62 64 59 +5 5.0 -
4 Shot Of Courage 55 73 59 +14 5.0 -
5 Quick Response - 59 59 ✓ Match 5.0 -
6 Whats Going On Roy - 30 59 -29 5.0 -
99 Easy Roy Easy - 37 56 -19 5.0 -
99 La Fille - 63 54 +9 5.0 -
99 Vision Of Will - 66 54 +12 5.0 -
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