Official NHA Assessment

Race 1: 4RACING WELCOMES YOU WORK RIDERS MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)

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Line Horse
Like A Butterfly
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
6 / 8
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    Scars Of War         2    56.5    1    0.00     0.0   -     60           6     +6
2    Silver Parasol       3    56.0    2    9.25     2.0   -     55           55    +55
3    Like A Butterfly     3    60.0    3    9.75     2.0   63    63           63    +0
4    Bella's Charm        3    56.0    4    15.00    2.0   -     55           55    +55
5    Butternutenrooiwyn   2    60.0    5    15.25    0.0   64    67           67    +3
6    Royal Horizon        3    60.0    6    16.25    2.0   47    63           63    +16
7    Captains Clover      2    57.0    7    20.25    0.0   -     61           61    +61
8    Three Bells          3    60.0    8    28.75    2.0   46    63           63    +17
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Scars Of War - 94 6 +88 0.0 -
2 Silver Parasol - 79 55 +24 2.0 -
3 Like A Butterfly Line 63 54 63 -9 2.0
4 Bella's Charm - 59 55 +4 2.0 -
5 Butternutenrooiwyn 64 60 67 -7 0.0 -
6 Royal Horizon 47 68 63 +5 2.0 -
7 Captains Clover - 54 61 -7 0.0 -
8 Three Bells 46 43 63 -20 2.0 -
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