Official NHA Assessment

Race 8: THE CLAPHAM STAKES (For Fillies and Mares (Non-Black Type))

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Line Horse
Beach Verse
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
6 / 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    Rose Woott (AUS)     3    52.5    1    0.00     4.0   79    72           72    -7
2    Beach Verse          2    52.5    2    0.40     0.0   85    85           85    +0
3    Kattekwaadkwadraad   3    52.5    3    0.70     4.0   87    77           77    -10
4    Ukuduma              2    57.0    4    4.95     0.0   95    89           89    -6
5    Kamchatka            3    60.0    5    5.25     4.0   93    87           87    -6
6    Boozy Susie          3    52.5    6    6.25     4.0   83    72           73    -10
7    Educator             2    57.0    7    7.25     0.0   96    89           89    -7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rose Woott (AUS) 79 85 72 +13 4.0 -
2 Beach Verse Line 85 97 85 +12 0.0
3 Kattekwaadkwadraad 87 87 77 +10 4.0 -
4 Ukuduma 95 91 89 +2 0.0 -
5 Kamchatka 93 93 87 +6 4.0 -
6 Boozy Susie 83 82 73 +9 4.0 -
7 Educator 96 96 89 +7 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