Official NHA Assessment

Race 3: MERIT RATED 71 HANDICAP (Open)

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Line Horse
Prince Of Kimberly
Reference for assessment
Exact Matches
1 / 4
Calculated = Official
Close Matches
2 / 4
Within 2 points
Significant Diffs
2 / 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    Zazu                 6    59.5    1    0.00     0.0   70    85           70    +0
2    Days Gone By         3    52.0    2    1.00     8.5   52    58           58    +6
3    Prince Of Kimberly   3    60.0    3    2.50     8.5   73    73           73    +0
4    My Secret Place      5    56.0    4    3.00     0.0   65    81           81    +16
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Zazu 70 71 70 +1 0.0 -
2 Days Gone By 52 51 58 -7 8.5 -
3 Prince Of Kimberly Line 73 73 73 ✓ Match 8.5
4 My Secret Place 65 71 81 -10 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