Official NHA Assessment

Race 5: HIGHVELD CHAMPION OLDER FILLY / MARE - FEATHER BOA GRADUATION PLATE (For 1 & 2 Time Winners & Maidens)

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Line Horse
Wyzeact
Reference for assessment
Exact Matches
0 / 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    The Africa House     4    57.0    1    0.00     0.5   102   89           70    -32
2    Wyzeact              4    60.0    2    0.75     0.5   99    99           99    +0
3    Richard The First    2    60.0    3    3.50     0.0   96    97           97    +1
4    Vitellius            5    56.0    4    4.00     0.0   77    89           89    +12
5    Copper Mist          2    56.0    5    5.50     0.0   82    88           88    +6
6    Kyomai               4    56.0    6    6.00     0.5   96    87           87    -9
7    Royal Edition        4    56.5    7    7.50     0.5   85    88           88    +3
8    Mizzen Sail          2    56.5    8    16.50    0.0   87    89           89    +2
99   Biofarmer            4    59.5    99   0.00     0.5   -     94           94    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 The Africa House 102 93 70 +23 0.5 -
2 Wyzeact Line 99 86 99 -13 0.5
3 Richard The First 96 87 97 -10 0.0 -
4 Vitellius 77 73 89 -16 0.0 -
5 Copper Mist 82 62 88 -26 0.0 -
6 Kyomai 96 70 87 -17 0.5 -
7 Royal Edition 85 92 88 +4 0.5 -
8 Mizzen Sail 87 87 89 -2 0.0 -
99 Biofarmer - 78 94 -16 0.5 -
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