Official NHA Assessment

Race 5: CHIBUKU SUPER MERIT RATED 85 HANDICAP (Open)

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Line Horse
Bruce's Spirit
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
3 / 7
Within 2 points
Significant Diffs
2 / 7
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    Jubilee              7    59.0    1    0.00     0.0   83    79           83    +0
2    Bruce's Spirit       6    54.0    2    1.25     0.0   73    73           73    +0
3    Tradition            4    54.5    3    1.35     0.5   74    72           72    -2
4    Differentiate        5    55.0    4    3.85     0.0   75    72           72    -3
5    Tigers Eagle         3    60.0    5    5.85     2.0   85    77           77    -8
6    Shesalegend          4    56.5    6    7.60     0.5   78    73           73    -5
99   Love The View        4    58.5    99   0.00     0.5   -     77           77    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Jubilee 83 72 83 -11 0.0 -
2 Bruce's Spirit Line 73 55 73 -18 0.0
3 Tradition 74 77 72 +5 0.5 -
4 Differentiate 75 72 72 ✓ Match 0.0 -
5 Tigers Eagle 85 79 77 +2 2.0 -
6 Shesalegend 78 74 73 +1 0.5 -
99 Love The View - 82 77 +5 0.5 -
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