Official NHA Assessment

Race 6: TAB EMPRESS CLUB STAKES (Grade 1) (For Fillies and Mares at Weight-for-Age)

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Line Horse
White Pearl
Reference for assessment
Exact Matches
2 / 7
Calculated = Official
Close Matches
3 / 7
Within 2 points
Significant Diffs
2 / 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    Fatal Flaw           3    57.0    1    0.00     3.0   115   103          103   -12
2    Spumante Dolce       3    57.0    2    1.25     3.0   119   107          109   -10
3    White Pearl          4    60.0    3    2.75     1.5   114   114          114   +0
4    Let's Go Now         4    60.0    4    4.05     1.5   113   113          113   +0
5    Beating Wings        4    60.0    5    4.25     1.5   116   113          113   -3
6    Lady Fallon          4    60.0    6    9.75     1.5   102   112          112   +10
7    Vj's Angel           3    57.0    7    22.50    3.0   119   103          109   -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Fatal Flaw 115 118 103 +15 3.0 -
2 Spumante Dolce 119 112 109 +3 3.0 -
3 White Pearl Line 114 114 114 ✓ Match 1.5
4 Let's Go Now 113 113 113 ✓ Match 1.5 -
5 Beating Wings 116 112 113 -1 1.5 -
6 Lady Fallon 102 100 112 -12 1.5 -
7 Vj's Angel 119 114 109 +5 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