Official NHA Assessment

Race 5: www.tabgold.co.za MR 65 HANDICAP (Open)

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Line Horse
Capetown Affair
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
4 / 11
Within 2 points
Significant Diffs
3 / 11
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    Hallerbos            3    58.0    1    0.00     3.0   61    55           61    +0
2    Capetown Affair      5    58.0    2    0.10     0.0   61    61           61    +0
3    Jetavana             3    60.0    3    0.35     3.0   65    64           64    -1
4    Vengeance Forever    3    58.5    4    2.35     3.0   62    58           58    -4
5    Word For Word        3    58.5    5    3.65     3.0   62    57           57    -5
6    Impartial            4    56.5    6    3.75     1.5   58    56           56    -2
7    Walton Hall          5    53.0    7    4.05     0.0   51    52           52    +1
8    National Dream       6    55.0    8    4.25     0.0   55    56           56    +1
9    Final Destiny        4    52.5    9    5.25     1.5   53    47           47    -6
10   Piketberg Alley      4    60.0    10   7.25     1.5   65    62           62    -3
99   Ravens Sword         3    59.5    99   0.00     3.0   -     58           58    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Hallerbos 61 57 61 -4 3.0 -
2 Capetown Affair Line 61 59 61 -2 0.0
3 Jetavana 65 65 64 +1 3.0 -
4 Vengeance Forever 62 51 58 -7 3.0 -
5 Word For Word 62 62 57 +5 3.0 -
6 Impartial 58 50 56 -6 1.5 -
7 Walton Hall 51 50 52 -2 0.0 -
8 National Dream 55 68 56 +12 0.0 -
9 Final Destiny 53 50 47 +3 1.5 -
10 Piketberg Alley 65 63 62 +1 1.5 -
99 Ravens Sword - 53 58 -5 3.0 -
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