Official NHA Assessment

Race 2: MERIT RATED 63 HANDICAP (F & M) (Open Fillies and Mares)

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Line Horse
Chetan
Reference for assessment
Exact Matches
1 / 4
Calculated = Official
Close Matches
1 / 4
Within 2 points
Significant Diffs
3 / 4
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    Ian's Ferrari        3    60.0    1    0.00     7.0   63    60           63    +0
2    Chetan               3    56.0    2    2.00     7.0   55    55           55    +0
3    Days Gone By         3    58.5    3    3.00     7.0   60    59           59    -1
4    Queen Of Dallas      3    54.5    4    5.00     7.0   52    49           49    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ian's Ferrari 63 63 63 ✓ Match 7.0 -
2 Chetan Line 55 45 55 -10 7.0
3 Days Gone By 60 51 59 -8 7.0 -
4 Queen Of Dallas 52 40 49 -9 7.0 -
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