Official NHA Assessment

Race 1: 4RACING WELCOMES YOU MAIDEN PLATE (3-year-old Fillies) (For Maiden 3 year-old Fillies)

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Line Horse
Hey Hey Julia
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
5 / 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    Bakwena              3    60.0    1    0.00     10.5  -     74           6     +6
2    Hey Hey Julia        2    60.0    2    6.00     7.0   81    81           81    +0
3    Lady Of Arc          2    60.0    3    7.50     7.0   -     81           81    +81
4    Ono No Komachi       3    60.0    4    9.25     10.5  -     74           74    +74
5    My Gal Viv           2    60.0    5    11.75    7.0   -     81           81    +81
6    Chasing The Crown    3    60.0    6    12.50    10.5  -     74           74    +74
99   Ruler Of Justice     2    60.0    99   0.00     7.0   -     81           81    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bakwena - 97 6 +91 10.5 -
2 Hey Hey Julia Line 81 81 81 ✓ Match 7.0
3 Lady Of Arc - 76 81 -5 7.0 -
4 Ono No Komachi - 66 74 -8 10.5 -
5 My Gal Viv - 64 81 -17 7.0 -
6 Chasing The Crown - 46 74 -28 10.5 -
99 Ruler Of Justice - 73 81 -8 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