Official NHA Assessment

Race 2: HAPPY FATHER'S DAY MAIDEN JUVENILE PLATE (Fillies) (For 2 year old fillies)

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Line Horse
None identified
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
8 / 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    Damostar             4    60.0    1    0.00     2.5   -     -            -     +0
2    Gotcha Buzz          2    60.0    2    2.25     1.0   -     -            -     +0
3    Vathomvlaffie        2    60.0    3    3.00     1.0   -     -            -     +0
4    Si Veloce            4    58.5    4    3.10     2.5   -     -            -     +0
5    Whirlybird           2    60.0    5    3.50     1.0   -     -            -     +0
6    Contra Fiscum        2    60.0    6    5.30     1.0   -     -            -     +0
7    Princess Lola        2    60.0    7    6.90     1.0   -     -            -     +0
8    Manhunter            2    60.0    8    16.15    1.0   -     -            -     +0
9    Magic Bank           2    57.5    9    35.40    1.0   -     -            -     +0
99   Sahara Dawn          4    60.0    99   0.00     2.5   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Damostar - 91 - +91 2.5 -
2 Gotcha Buzz - 61 - +61 1.0 -
3 Vathomvlaffie - 56 - +56 1.0 -
4 Si Veloce - 50 - +50 2.5 -
5 Whirlybird - 73 - +73 1.0 -
6 Contra Fiscum - 76 - +76 1.0 -
7 Princess Lola - 60 - +60 1.0 -
8 Manhunter - - - ✓ Match 1.0 -
9 Magic Bank - 42 - +42 1.0 -
99 Sahara Dawn - 52 - - 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