Official NHA Assessment

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

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Line Horse
Elmhurst
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
4 / 7
Within 2 points
Significant Diffs
2 / 7
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    Elmhurst             2    60.0    1    0.00     1.5   55    55           55    +0
2    Evocative            3    57.5    2    0.25     2.5   52    48           48    -4
3    Apache Gold          3    60.0    3    0.50     2.5   45    53           53    +8
4    Nandine              3    57.5    4    1.75     2.5   -     48           48    +48
5    Aratula              3    60.0    5    3.50     2.5   -     53           53    +53
6    Jumped A Red         2    54.5    6    13.50    1.5   -     44           44    +44
7    Onceajackpot         3    60.0    7    14.50    2.5   -     53           53    +53
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Elmhurst Line 55 56 55 +1 1.5
2 Evocative 52 44 48 -4 2.5 -
3 Apache Gold 45 52 53 -1 2.5 -
4 Nandine - 60 48 +12 2.5 -
5 Aratula - 45 53 -8 2.5 -
6 Jumped A Red - 42 44 -2 1.5 -
7 Onceajackpot - 53 53 ✓ Match 2.5 -
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