Official NHA Assessment

Race 7: www.tabgold.co.za MR 104 HANDICAP (Open)

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Line Horse
Gallic Chief
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
6 / 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    Coin Spinner         3    58.0    1    0.00     10.5  100   103          100   +0
2    Gallic Chief         3    57.5    2    0.40     10.5  102   102          102   +0
2    Captain Fontane      4    60.5    2    0.40     12.0  105   105          105   +0
4    Mount Pleasant (AUS  4    59.5    4    0.90     12.0  103   103          103   +0
5    Bowie                7    56.5    5    1.30     0.0   97    121          121   +24
6    Aqua Bolt            5    58.0    6    2.35     0.0   100   124          124   +24
7    Ishnana              7    53.0    7    2.65     0.0   98    114          114   +16
99   Hawker Typhoon       4    58.0    99   0.00     12.0  -     100          100   +0
99   Mardi Gras           7    54.0    99   0.00     0.0   -     116          116   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Coin Spinner 100 101 100 +1 10.5 -
2 Gallic Chief Line 102 98 102 -4 10.5
2 Captain Fontane 105 109 105 +4 12.0 -
4 Mount Pleasant (AUS) 103 71 103 -32 12.0 -
5 Bowie 97 82 121 -39 0.0 -
6 Aqua Bolt 100 84 124 -40 0.0 -
7 Ishnana 98 83 114 -31 0.0 -
99 Hawker Typhoon - 89 100 -11 12.0 -
99 Mardi Gras - 83 116 -33 0.0 -
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