Official NHA Assessment

Race 6: UMZIMKHULU STAKES (Grade 3) (For 3 year-old Fillies)

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Line Horse
Mia Moo
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
8 / 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    Double Grand Slam    2    58.5    1    0.00     0.0   117   109          109   -8
2    Mia Moo              4    57.0    2    5.30     1.5   103   103          103   +0
3    Rascova              2    60.0    3    5.35     0.0   115   112          112   -3
4    Minogue              4    57.0    4    5.85     1.5   96    103          103   +7
5    Sovereign Grant      4    57.0    5    6.45     1.5   90    103          103   +13
6    Bomber Girl          4    57.0    6    8.15     1.5   97    103          103   +6
7    Le Premiere          4    57.0    7    8.75     1.5   81    103          103   +22
8    Mauritania           2    57.0    8    16.25    0.0   86    106          106   +20
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Double Grand Slam 117 122 109 +13 0.0 -
2 Mia Moo Line 103 119 103 +16 1.5
3 Rascova 115 122 112 +10 0.0 -
4 Minogue 96 112 103 +9 1.5 -
5 Sovereign Grant 90 92 103 -11 1.5 -
6 Bomber Girl 97 84 103 -19 1.5 -
7 Le Premiere 81 84 103 -19 1.5 -
8 Mauritania 86 74 106 -32 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