Official NHA Assessment

Race 1: Hollywoodbets WORK RIDER'S SERIES LEG 5 MAIDEN PLATE (For all Maidens)

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Line Horse
Johnny Drama
Reference for assessment
Exact Matches
1 / 6
Calculated = Official
Close Matches
1 / 6
Within 2 points
Significant Diffs
5 / 6
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    Stu's Girl           3    59.5    1    0.00     2.5   70    67           67    -3
2    Johnny Drama         3    62.0    2    0.05     2.5   72    72           72    +0
3    Joueur De Flute      3    62.0    3    2.80     2.5   80    74           74    -6
4    Duchess Of Paloma    3    59.5    4    3.20     2.5   75    69           69    -6
5    Larking About        3    59.5    5    7.95     2.5   -     67           67    +67
6    Marine Merchant      3    62.0    6    14.20    2.5   73    72           72    -1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Stu's Girl 70 67 67 ✓ Match 2.5 -
2 Johnny Drama Line 72 78 72 +6 2.5
3 Joueur De Flute 80 67 74 -7 2.5 -
4 Duchess Of Paloma 75 91 69 +22 2.5 -
5 Larking About - 55 67 -12 2.5 -
6 Marine Merchant 73 66 72 -6 2.5 -
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