Official NHA Assessment

Race 3: RACE COAST MAIDEN PLATE (For all Maidens)

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Line Horse
Son Of Rafeef
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
9 / 10
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    Cognac               3    60.0    1    0.00     9.5   -     -            -     +0
2    Son Of Rafeef        3    60.0    2    3.30     9.5   -     -            -     +0
3    Winter In London     3    60.0    3    4.30     9.5   -     -            -     +0
4    Bourne Supremacy     2    60.0    4    6.10     6.5   -     6            6     +6
5    War Emperor          3    60.0    5    9.30     9.5   -     -            -     +0
6    Cleartherunway       3    60.0    6    10.80    9.5   -     -            -     +0
7    Beyond All Doubt     3    60.0    7    11.00    9.5   -     -            -     +0
8    Here Comes Johnny    3    60.0    8    14.20    9.5   -     -            -     +0
9    Thurloe Place        3    60.0    9    16.60    9.5   -     -            -     +0
10   Play World           3    60.0    10   17.30    9.5   -     -            -     +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Cognac - 97 - +97 9.5 -
2 Son Of Rafeef Line - 87 - +87 9.5
3 Winter In London - 80 - +80 9.5 -
4 Bourne Supremacy - 78 6 +72 6.5 -
5 War Emperor - 74 - +74 9.5 -
6 Cleartherunway - 88 - +88 9.5 -
7 Beyond All Doubt - 85 - +85 9.5 -
8 Here Comes Johnny - 71 - +71 9.5 -
9 Thurloe Place - 70 - +70 9.5 -
10 Play World - - - ✓ Match 9.5 -
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