Official NHA Assessment

Race 8: TAKE A BET WINA NUMBA NUMBA PINNACLE STAKES (Open)

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Line Horse
The Africa House
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
6 / 7
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    Unzen                3    54.0    1    0.00     0.5   109   118          115   +6
2    Main Defender        4    62.0    2    1.40     0.5   131   137          137   +6
3    The Africa House     4    46.0    3    5.50     0.5   102   102          102   +0
4    Swing Upon A Star    2    52.5    4    7.25     0.0   104   116          116   +12
5    Bingwa               7    62.0    5    7.75     0.0   123   135          135   +12
6    Laguna Verde         5    50.0    6    13.00    0.0   97    111          111   +14
7    Tail Of The Comet    4    52.5    7    23.50    0.5   106   115          115   +9
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Unzen 109 116 115 +1 0.5 -
2 Main Defender 131 130 137 -7 0.5 -
3 The Africa House Line 102 93 102 -9 0.5
4 Swing Upon A Star 104 102 116 -14 0.0 -
5 Bingwa 123 107 135 -28 0.0 -
6 Laguna Verde 97 86 111 -25 0.0 -
7 Tail Of The Comet 106 79 115 -36 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