Official NHA Assessment

Race 1: MAIDEN PLATE (Maiden Plate Colts & Geldings to carry)

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Line Horse
Elmhurst
Reference for assessment
Exact Matches
1 / 6
Calculated = Official
Close Matches
2 / 6
Within 2 points
Significant Diffs
2 / 6
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    Action Zone          3    60.0    1    0.00     8.5   -     54           6     +6
2    Scala Dei Turchi     2    57.5    2    0.10     5.5   -     55           55    +55
3    Elmhurst             2    60.0    3    1.60     5.5   60    60           60    +0
4    My Secret Place      5    57.5    4    3.35     0.0   -     66           66    +66
5    Lady Emma Hamilton   2    57.5    5    3.60     5.5   -     55           55    +55
6    Zavannahgold         2    57.5    6    6.10     5.5   -     55           55    +55
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Action Zone - 90 6 +84 8.5 -
2 Scala Dei Turchi - 55 55 ✓ Match 5.5 -
3 Elmhurst Line 60 56 60 -4 5.5
4 My Secret Place - 71 66 +5 0.0 -
5 Lady Emma Hamilton - 57 55 +2 5.5 -
6 Zavannahgold - 78 55 +23 5.5 -
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