Official NHA Assessment

Race 4: TAKE A BET WINA NUMBA NUMBA MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Callaburn
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
7 / 10
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    Dark Silver          4    60.0    1    0.00     1.5   77    69           69    -8
2    Douglas Dragon       3    60.0    2    1.75     3.5   72    70           70    -2
3    Callaburn            2    60.0    3    5.00     0.0   72    72           72    +0
4    Teo Torriatte        4    56.5    4    6.50     1.5   75    62           65    -10
5    Russian Lotus        3    60.0    5    7.75     3.5   -     65           65    +65
6    Taxhaven             4    60.0    6    7.95     1.5   96    69           86    -10
7    Touched By Stars     5    60.0    7    8.45     0.0   55    72           72    +17
8    Karoo Gold           3    60.0    8    8.95     3.5   77    65           67    -10
9    Dhoni                2    60.0    9    18.45    0.0   78    72           72    -6
99   Mishrah              3    60.0    99   0.00     3.5   -     65           65    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Dark Silver 77 84 69 +15 1.5 -
2 Douglas Dragon 72 89 70 +19 3.5 -
3 Callaburn Line 72 52 72 -20 0.0
4 Teo Torriatte 75 94 65 +29 1.5 -
5 Russian Lotus - 59 65 -6 3.5 -
6 Taxhaven 96 96 86 +10 1.5 -
7 Touched By Stars 55 52 72 -20 0.0 -
8 Karoo Gold 77 67 67 ✓ Match 3.5 -
9 Dhoni 78 76 72 +4 0.0 -
99 Mishrah - 61 65 -4 3.5 -
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