Official NHA Assessment

Race 4: CHAMPIONS DAY 6 APRIL 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 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
6 / 9
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    Free In Seattle      3    56.0    1    0.00     2.5   -     52           6     +6
2    Villa Semaya         2    60.0    2    0.25     0.0   69    65           65    -4
3    Messalina            3    56.0    3    0.75     2.5   -     56           56    +56
4    Like A Butterfly     3    60.0    4    2.00     2.5   63    63           63    +0
5    Honorable Member     3    55.0    5    3.25     2.5   -     52           52    +52
6    Bilingual            4    60.0    6    3.50     1.0   71    64           64    -7
7    Sneak Preview        3    60.0    7    4.75     2.5   -     60           60    +60
8    Kiss Of Fire         5    60.0    8    5.25     0.0   61    65           65    +4
9    Gloria Mundi         2    56.0    9    7.00     0.0   -     57           57    +57
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Free In Seattle - 89 6 +83 2.5 -
2 Villa Semaya 69 59 65 -6 0.0 -
3 Messalina - 71 56 +15 2.5 -
4 Like A Butterfly Line 63 54 63 -9 2.5
5 Honorable Member - 88 52 +36 2.5 -
6 Bilingual 71 60 64 -4 1.0 -
7 Sneak Preview - 63 60 +3 2.5 -
8 Kiss Of Fire 61 68 65 +3 0.0 -
9 Gloria Mundi - 66 57 +9 0.0 -
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