Official NHA Assessment

Race 3: WHAT A DANDY MERIT RATED 84 HANDICAP (Open)

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Line Horse
Zazu
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    Karvani              7    55.5    1    0.00     0.0   75    75           75    +0
2    Zazu                 6    59.5    2    5.00     0.0   83    83           83    +0
3    Power Ranger         7    60.0    3    5.25     0.0   84    84           84    +0
4    Ian's Ferrari        3    56.5    4    9.25     3.5   77    70           70    -7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Karvani 75 73 75 -2 0.0 -
2 Zazu Line 83 71 83 -12 0.0
3 Power Ranger 84 69 84 -15 0.0 -
4 Ian's Ferrari 77 63 70 -7 3.5 -
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