Official NHA Assessment

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

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Line Horse
Gimmie's Countess
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
4 / 8
Within 2 points
Significant Diffs
4 / 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    Green Sapphire       3    58.5    1    0.00     2.5   95    101          101   +6
2    Gimmie's Countess    3    60.0    2    1.10     2.5   108   108          108   +0
3    Regeneration         3    58.5    3    1.40     2.5   91    104          104   +13
4    Jeanne Darc          3    58.5    4    1.70     2.5   83    104          104   +21
5    Magical View         3    58.5    5    3.60     2.5   90    102          102   +12
6    Warrior Royale       3    58.5    6    3.90     2.5   96    102          102   +6
7    One Path             3    58.5    7    7.50     2.5   79    101          101   +22
99   Sonic Jet            3    58.5    99   0.00     2.5   -     101          101   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Green Sapphire 95 109 101 +8 2.5 -
2 Gimmie's Countess Line 108 107 108 -1 2.5
3 Regeneration 91 105 104 +1 2.5 -
4 Jeanne Darc 83 83 104 -21 2.5 -
5 Magical View 90 88 102 -14 2.5 -
6 Warrior Royale 96 101 102 -1 2.5 -
7 One Path 79 76 101 -25 2.5 -
99 Sonic Jet - 101 101 ✓ Match 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