Official NHA Assessment

Race 1: DUNCAN HOWELLS RACING STABLES MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Mia Sophia
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
7 / 9
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    Tangerine Pearl      2    54.0    1    0.00     6.5   65    50           50    -15
2    Swiss Paradise       3    58.0    2    0.80     9.5   -     52           52    +52
3    I Like It Hot        2    58.0    3    1.20     6.5   78    58           68    -10
4    Mia Sophia           3    60.0    4    3.20     9.5   56    56           56    +0
5    Abound Light         2    58.0    5    3.50     6.5   52    58           58    +6
6    Namibsroos           3    60.0    6    5.10     9.5   57    56           56    -1
7    A Time To Dance      3    58.0    7    7.00     9.5   -     52           52    +52
8    Foreign Lady         3    54.0    8    9.70     9.5   -     44           44    +44
9    Seaside Girl         4    60.0    9    14.10    11.0  -     53           53    +53
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Tangerine Pearl 65 58 50 +8 6.5 -
2 Swiss Paradise - 60 52 +8 9.5 -
3 I Like It Hot 78 76 68 +8 6.5 -
4 Mia Sophia Line 56 62 56 +6 9.5
5 Abound Light 52 56 58 -2 6.5 -
6 Namibsroos 57 57 56 +1 9.5 -
7 A Time To Dance - 60 52 +8 9.5 -
8 Foreign Lady - 60 44 +16 9.5 -
9 Seaside Girl - 41 53 -12 11.0 -
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