Official NHA Assessment

Race 2: TAB PROTEA STAKES (Grade 3) (For 2 yo R100 000 Win BSA / CRS Bonus)

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Line Horse
None identified
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
0 / 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    Green Diamond        2    57.5    1    0.00     2.0   -     -            -     +0
2    Vanakkam             2    54.5    2    6.50     2.0   -     -            -     +0
3    Kaalvoet             2    60.0    3    6.60     2.0   -     -            -     +0
4    Tin Pan Alley        2    60.0    4    7.35     2.0   -     -            -     +0
5    Porridge Boy         2    57.0    5    9.75     2.0   -     -            -     +0
6    King Harald          2    60.0    6    12.75    2.0   -     -            -     +0
99   Lava County          2    57.0    99   0.00     2.0   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Green Diamond - 111 - +111 2.0 -
2 Vanakkam - 93 - +93 2.0 -
3 Kaalvoet - 93 - +93 2.0 -
4 Tin Pan Alley - 128 - +128 2.0 -
5 Porridge Boy - 101 - +101 2.0 -
6 King Harald - 102 - +102 2.0 -
99 Lava County - 87 - - 2.0 -
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