Official NHA Assessment

Race 7: GREYVILLE CONVENTION CENTRE FM 65 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Miss Charlotte
Reference for assessment
Exact Matches
2 / 10
Calculated = Official
Close Matches
3 / 10
Within 2 points
Significant Diffs
6 / 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    Owlette              4    55.5    1    0.00     1.0   56    52           56    +0
2    Arctic Princess      5    57.5    2    1.20     0.0   63    62           62    -1
3    Miss Charlotte       5    57.5    3    2.60     0.0   60    60           60    +0
4    Fearless Kitty       3    58.5    4    2.65     2.0   67    58           58    -9
5    Cordobesa            3    57.5    5    3.05     2.0   65    56           56    -9
6    Rose Princess        4    61.0    6    7.25     1.0   67    63           63    -4
7    Top Honours          4    57.5    7    8.25     1.0   60    56           56    -4
8    Emerald Isla         4    57.0    8    8.75     1.0   59    55           55    -4
99   Kingsmeads Krystl    3    55.0    99   0.00     2.0   -     49           49    +0
99   Maid In France       4    59.0    99   0.00     1.0   -     59           59    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Owlette 56 56 56 ✓ Match 1.0 -
2 Arctic Princess 63 66 62 +4 0.0 -
3 Miss Charlotte Line 60 52 60 -8 0.0
4 Fearless Kitty 67 67 58 +9 2.0 -
5 Cordobesa 65 73 56 +17 2.0 -
6 Rose Princess 67 53 63 -10 1.0 -
7 Top Honours 60 45 56 -11 1.0 -
8 Emerald Isla 59 55 55 ✓ Match 1.0 -
99 Kingsmeads Krystl - 68 49 +19 2.0 -
99 Maid In France - 57 59 -2 1.0 -
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