Official NHA Assessment

Race 2: DOWNLOAD THE RACECARD ONLINE www.goldcircle.co.za MR 66 HANDICAP (Open)

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Line Horse
Porfirio
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
3 / 7
Within 2 points
Significant Diffs
1 / 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    Kimball O'Hara       2    60.0    1    0.00     0.0   66    63           66    +0
2    Basie Raakvat        4    60.5    2    0.60     0.5   70    68           68    -2
3    Porfirio             6    59.5    3    1.30     0.0   65    65           65    +0
4    Attaboy              2    60.5    4    3.20     0.0   70    66           66    -4
5    Brave Voyager        3    56.0    5    3.45     1.5   61    53           53    -8
6    Forest Jump          8    60.0    6    3.65     0.0   66    64           64    -2
99   Green Sceptre        2    55.5    99   0.00     0.0   -     54           54    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Kimball O'Hara 66 61 66 -5 0.0 -
2 Basie Raakvat 70 63 68 -5 0.5 -
3 Porfirio Line 65 88 65 +23 0.0
4 Attaboy 70 65 66 -1 0.0 -
5 Brave Voyager 61 51 53 -2 1.5 -
6 Forest Jump 66 62 64 -2 0.0 -
99 Green Sceptre - 50 54 -4 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