Official NHA Assessment

Race 4: RACEHORSE OWNERS ASSOCIATION FM 68 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Stunning Kitten
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
3 / 7
Within 2 points
Significant Diffs
4 / 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    Mirren               4    60.0    1    0.00     7.0   68    48           68    +0
2    Ashanti Sword        2    55.0    2    1.00     0.0   78    58           68    -10
3    Stunning Kitten      5    58.0    3    1.20     0.0   64    64           64    +0
4    Seconda Errore       3    59.5    4    2.45     10.0  69    45           59    -10
5    Saint Anastasia      3    58.0    5    2.70     10.0  66    42           56    -10
6    Sacred Valley        3    55.5    6    3.40     10.0  64    36           54    -10
7    Mariposa             4    51.5    7    4.60     7.0   54    32           44    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Mirren 68 67 68 -1 7.0 -
2 Ashanti Sword 78 52 68 -16 0.0 -
3 Stunning Kitten Line 64 66 64 +2 0.0
4 Seconda Errore 69 68 59 +9 10.0 -
5 Saint Anastasia 66 63 56 +7 10.0 -
6 Sacred Valley 64 44 54 -10 10.0 -
7 Mariposa 54 46 44 +2 7.0 -
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