Official NHA Assessment

Race 3: www.tabgold.co.za MR 91 HANDICAP (Open)

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Line Horse
Royal Swan Master
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
5 / 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    Positive Attitude    6    57.5    1    0.00     0.0   89    107          89    +0
2    Royal Swan Master    3    56.0    2    0.10     9.5   85    85           85    +0
3    Mvelelo              2    52.0    3    0.40     0.0   77    101          101   +24
4    Nocturnal Flight     3    52.0    4    0.70     9.5   77    82           82    +5
5    Banzai Pipeline      7    52.5    5    0.95     0.0   76    101          101   +25
6    Trois Trois Quatre   5    60.5    6    1.20     0.0   92    117          117   +25
7    Zakho                3    58.0    7    3.80     9.5   87    90           90    +3
99   Officer In Command   4    58.5    99   0.00     6.0   -     97           97    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Positive Attitude 89 90 89 +1 0.0 -
2 Royal Swan Master Line 85 83 85 -2 9.5
3 Mvelelo 77 84 101 -17 0.0 -
4 Nocturnal Flight 77 72 82 -10 9.5 -
5 Banzai Pipeline 76 62 101 -39 0.0 -
6 Trois Trois Quatre 92 87 117 -30 0.0 -
7 Zakho 87 87 90 -3 9.5 -
99 Officer In Command - 86 97 -11 6.0 -
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