Official NHA Assessment

Race 4: PERFECTLY PLACED MAIDEN PLATE (For all Maidens)

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Line Horse
Apache Chief
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
4 / 11
Within 2 points
Significant Diffs
4 / 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    Mela Strength        3    60.0    1    0.00     0.5   60    72           66    +6
2    Apache Chief         4    60.0    2    0.20     0.5   72    72           72    +0
3    Twentytwentyvision   2    60.0    3    0.60     0.0   69    78           78    +9
4    Arbitration          2    56.0    4    0.90     0.0   -     69           69    +69
5    Cliff Swallow        3    60.0    5    4.65     0.5   74    72           72    -2
6    Fly In Style         3    60.0    6    28.65    0.5   -     72           72    +72
99   Givethatmanabells    4    60.0    99   0.00     0.5   -     72           72    +0
99   Express Yourself     2    56.0    99   0.00     0.0   -     65           65    +0
99   Joueur De Flute      3    56.0    99   0.00     0.5   -     64           64    +0
99   Approach Shot        2    60.0    99   0.00     0.0   -     73           73    +0
99   Mr Belvedere         4    60.0    99   0.00     0.5   -     72           72    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Mela Strength 60 63 66 -3 0.5 -
2 Apache Chief Line 72 74 72 +2 0.5
3 Twentytwentyvision 69 80 78 +2 0.0 -
4 Arbitration - 78 69 +9 0.0 -
5 Cliff Swallow 74 72 72 ✓ Match 0.5 -
6 Fly In Style - 48 72 -24 0.5 -
99 Givethatmanabells - 70 72 -2 0.5 -
99 Express Yourself - 74 65 +9 0.0 -
99 Joueur De Flute - 67 64 +3 0.5 -
99 Approach Shot - 70 73 -3 0.0 -
99 Mr Belvedere - 55 72 -17 0.5 -
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