Official NHA Assessment

Race 3: RIETHUISKRAAL STUD CLASS 5 (Open. Benchmark at 60.0kg = 66)

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Line Horse
Mela Strength
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
6 / 8
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    Azzurri              4    61.5    1    0.00     3.0   69    75           75    +6
2    Mela Strength        3    59.0    2    0.20     6.0   64    64           64    +0
3    Beer With The Boys   3    59.5    3    0.50     6.0   65    70           70    +5
4    Ozark                4    61.5    4    3.25     3.0   69    77           77    +8
5    State Capitol        4    59.0    5    3.45     3.0   64    71           71    +7
6    Avignon              4    58.0    6    3.85     3.0   62    69           69    +7
7    Hang Out The Stars   5    58.0    7    8.85     0.0   62    74           74    +12
8    Etoilefillante       4    59.0    8    14.60    3.0   64    70           70    +6
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Azzurri 69 77 75 +2 3.0 -
2 Mela Strength Line 64 63 64 -1 6.0
3 Beer With The Boys 65 59 70 -11 6.0 -
4 Ozark 69 61 77 -16 3.0 -
5 State Capitol 64 55 71 -16 3.0 -
6 Avignon 62 61 69 -8 3.0 -
7 Hang Out The Stars 62 58 74 -16 0.0 -
8 Etoilefillante 64 51 70 -19 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