Official NHA Assessment

Race 5: THE JOIN THE ZIMFUN RACING MIDDLE STAKES (For horses with nett rating of 92 and below)

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Line Horse
Bugatti Blue
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
2 / 6
Within 2 points
Significant Diffs
2 / 6
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    Citrusdal            8    60.0    1    0.00     0.0   91    86           86    -5
2    Aerial Display       5    54.0    2    0.75     0.0   76    78           78    +2
3    Zazu                 6    50.0    3    1.75     0.0   72    69           69    -3
4    Bugatti Blue         7    60.0    4    2.00     0.0   89    89           89    +0
5    Obscure              4    52.5    5    4.00     1.5   81    69           71    -10
6    Why Madera           2    60.0    6    99.00    0.0   89    86           86    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Citrusdal 91 81 86 -5 0.0 -
2 Aerial Display 76 68 78 -10 0.0 -
3 Zazu 72 71 69 +2 0.0 -
4 Bugatti Blue Line 89 87 89 -2 0.0
5 Obscure 81 87 71 +16 1.5 -
6 Why Madera 89 89 86 +3 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