Official NHA Assessment

Race 2: MERIT RATED 65 HANDICAP (Open)

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Line Horse
Days Gone By
Reference for assessment
Exact Matches
1 / 5
Calculated = Official
Close Matches
5 / 5
Within 2 points
Significant Diffs
0 / 5
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    Duchess Of War       2    54.5    1    0.00     0.0   55    53           55    +0
2    Elmhurst             2    55.0    2    0.10     0.0   55    54           54    -1
3    Days Gone By         3    54.0    3    1.60     1.0   53    53           53    +0
4    Chetan               3    52.0    4    5.10     1.0   47    46           46    -1
5    Kursk (AUS)          6    62.0    5    7.10     0.0   69    68           68    -1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Duchess Of War 55 55 55 ✓ Match 0.0 -
2 Elmhurst 55 56 54 +2 0.0 -
3 Days Gone By Line 53 51 53 -2 1.0
4 Chetan 47 45 46 -1 1.0 -
5 Kursk (AUS) 69 67 68 -1 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