Official NHA Assessment

Race 1: 4RACING WELCOMES YOU MAIDEN JUVENILE PLATE (Fillies) (For 2 yof R100 000 Win BSA Bonus Series)

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Line Horse
None identified
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
0 / 7
Within 2 points
Significant Diffs
6 / 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    Mrs Geriatrix        2    60.0    1    0.00     4.0   -     -            -     +0
2    Exchange Student     4    60.0    2    0.50     7.0   -     -            -     +0
3    Heirloom             4    58.5    3    1.75     7.0   -     -            -     +0
4    Drumskitt            2    60.0    4    6.00     4.0   -     -            -     +0
5    Spring In Heaven     2    60.0    5    8.50     4.0   -     -            -     +0
6    Annewithan E         2    60.0    6    18.50    4.0   -     -            -     +0
99   Divine Moonlight     4    60.0    99   0.00     7.0   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Mrs Geriatrix - 112 - +112 4.0 -
2 Exchange Student - 104 - +104 7.0 -
3 Heirloom - 67 - +67 7.0 -
4 Drumskitt - 72 - +72 4.0 -
5 Spring In Heaven - 87 - +87 4.0 -
6 Annewithan E - 74 - +74 4.0 -
99 Divine Moonlight - 75 - - 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