Official NHA Assessment

Race 1: CHARLES DICKENS STAKES (2yo R100000 Win BSA/CRS Bonus (NBT) Leg 1 Sum Juv 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
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    Black Cheetah        2    60.0    1    0.00     3.5   -     -            -     +0
2    Clair De Lune        2    57.5    2    0.30     3.5   -     -            -     +0
3    Parental Guidance    2    60.0    3    1.30     3.5   -     -            -     +0
4    Malmesbury Missile   2    60.0    4    3.05     3.5   -     -            -     +0
5    Orbit                2    60.0    5    12.80    3.5   -     -            -     +0
99   Call Of The Karoo    2    57.5    99   0.00     3.5   -     -            -     +0
99   Winter Snap          2    60.0    99   0.00     3.5   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Black Cheetah - 91 - +91 3.5 -
2 Clair De Lune - 84 - +84 3.5 -
3 Parental Guidance - 82 - +82 3.5 -
4 Malmesbury Missile - 110 - +110 3.5 -
5 Orbit - 90 - +90 3.5 -
99 Call Of The Karoo - 79 - - 3.5 -
99 Winter Snap - 108 - - 3.5 -
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