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 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
7 / 11
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    Freedom Square       3    60.0    1    0.00     5.0   60    62           62    +2
2    Higgledy Piggledy    3    59.0    2    1.50     5.0   66    63           63    -3
3    Like A Butterfly     3    59.0    3    5.00     5.0   60    60           60    +0
4    Volare E Mambo       4    60.0    4    6.00     2.5   -     67           67    +67
5    The Navy Lark        4    59.5    5    8.50     2.5   57    66           66    +9
6    Liberty Flag         2    60.0    6    10.00    0.0   58    72           72    +14
7    Ice Cap              3    57.5    7    10.25    5.0   66    57           57    -9
8    Dee Day              4    59.0    8    10.85    2.5   64    65           65    +1
9    Whistledown          4    59.0    9    13.00    2.5   55    65           65    +10
10   Waitforgreenlight    2    59.0    10   13.60    0.0   72    70           70    -2
11   More Than All        2    59.0    11   18.00    0.0   68    70           70    +2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Freedom Square 60 63 62 +1 5.0 -
2 Higgledy Piggledy 66 74 63 +11 5.0 -
3 Like A Butterfly Line 60 54 60 -6 5.0
4 Volare E Mambo - 76 67 +9 2.5 -
5 The Navy Lark 57 74 66 +8 2.5 -
6 Liberty Flag 58 59 72 -13 0.0 -
7 Ice Cap 66 54 57 -3 5.0 -
8 Dee Day 64 53 65 -12 2.5 -
9 Whistledown 55 63 65 -2 2.5 -
10 Waitforgreenlight 72 67 70 -3 0.0 -
11 More Than All 68 58 70 -12 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