Official NHA Assessment

Race 3: MERIT RATED 79 HANDICAP (Open)

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Line Horse
Karvani
Reference for assessment
Exact Matches
0 / 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    Master Tik Tok       5    54.0    1    0.00     0.0   67    64           67    +0
2    Karvani              7    58.0    2    1.75     0.0   75    75           75    +0
3    Cutback              6    57.5    3    8.75     0.0   74    71           71    -3
4    Ian's Ferrari        3    60.0    4    9.50     6.0   79    64           69    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Master Tik Tok 67 80 67 +13 0.0 -
2 Karvani Line 75 73 75 -2 0.0
3 Cutback 74 63 71 -8 0.0 -
4 Ian's Ferrari 79 63 69 -6 6.0 -
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