Official NHA Assessment

Race 1: GALLOP TV OPEN MAIDEN (For all Maidens)

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Line Horse
Donmagoo
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
3 / 7
Within 2 points
Significant Diffs
3 / 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    Power Of Pearls      2    54.5    1    0.00     1.5   73    61           61    -12
2    Captain T            3    54.5    2    1.00     2.5   57    59           59    +2
3    Catrien              3    50.0    3    1.40     2.5   58    50           50    -8
4    Donmagoo             3    56.0    4    1.45     2.5   62    62           62    +0
5    Winter Miracle       3    53.5    5    1.85     2.5   60    57           57    -3
6    Highveld Storm       3    59.0    6    2.95     2.5   66    68           68    +2
7    Sierra Foxtrot       3    60.0    7    3.85     2.5   -     70           70    +70
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Power Of Pearls 73 73 61 +12 1.5 -
2 Captain T 57 60 59 +1 2.5 -
3 Catrien 58 58 50 +8 2.5 -
4 Donmagoo Line 62 62 62 ✓ Match 2.5
5 Winter Miracle 60 58 57 +1 2.5 -
6 Highveld Storm 66 63 68 -5 2.5 -
7 Sierra Foxtrot - - 70 -70 2.5 -
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