Official NHA Assessment

Race 7: MOTHER RUSSIA STAKES (Grade 3) (3 year old Fillies)

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Line Horse
White Pearl
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
8 / 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    Let's Go Now         4    60.0    1    0.00     2.5   99    109          105   +6
2    White Pearl          4    60.0    2    0.20     2.5   109   109          109   +0
3    Mia Moo              4    60.0    3    2.75     2.5   87    111          111   +24
4    Lady Fallon          4    60.0    4    4.25     2.5   94    110          110   +16
5    Garlandsofgreenery   3    60.0    5    4.75     4.0   91    106          106   +15
6    Mary's Greenlight    4    60.0    6    5.75     2.5   97    109          109   +12
7    Betula               2    60.0    7    6.25     0.0   100   114          114   +14
8    Key Element          4    60.0    8    8.25     2.5   98    109          109   +11
9    Woman Of Power       4    60.0    9    16.25    2.5   88    109          109   +21
99   Elegant Ice          4    60.0    99   0.00     2.5   -     109          109   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Let's Go Now 99 113 105 +8 2.5 -
2 White Pearl Line 109 114 109 +5 2.5
3 Mia Moo 87 119 111 +8 2.5 -
4 Lady Fallon 94 100 110 -10 2.5 -
5 Garlandsofgreenery 91 94 106 -12 4.0 -
6 Mary's Greenlight 97 103 109 -6 2.5 -
7 Betula 100 94 114 -20 0.0 -
8 Key Element 98 92 109 -17 2.5 -
9 Woman Of Power 88 92 109 -17 2.5 -
99 Elegant Ice - 108 109 -1 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