Official NHA Assessment

Race 2: WIN A JETOUR X70 ON 29 NOVEMBER MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Master's Lady
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
7 / 8
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    Amazonian            2    59.0    1    0.00     5.0   75    81           81    +6
2    Master's Lady        2    59.0    2    1.80     5.0   81    81           81    +0
3    Duchess Di           3    55.0    3    2.30     7.5   -     68           68    +68
4    Varachino's Champ    3    59.0    4    3.60     7.5   -     76           76    +76
5    Storm Ballet         2    59.0    5    5.90     5.0   -     81           81    +81
6    Winter Belle         2    59.0    6    6.15     5.0   74    81           81    +7
7    Rissiepit            3    59.0    7    8.85     7.5   60    76           76    +16
99   Speedwell Queen      5    60.0    99   0.00     0.0   -     93           93    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Amazonian 75 73 81 -8 5.0 -
2 Master's Lady Line 81 70 81 -11 5.0
3 Duchess Di - 74 68 +6 7.5 -
4 Varachino's Champ - 75 76 -1 7.5 -
5 Storm Ballet - 68 81 -13 5.0 -
6 Winter Belle 74 70 81 -11 5.0 -
7 Rissiepit 60 60 76 -16 7.5 -
99 Speedwell Queen - - 93 -93 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