Official NHA Assessment

Race 4: AIRPORT COMPANY OF ZIMBABWE MERIT RATED 87 HANDICAP (Open)

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Line Horse
Coffeeberry
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
0 / 6
Within 2 points
Significant Diffs
4 / 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    My Secret Place      5    55.0    1    0.00     0.0   77    74           77    +0
2    Captive Moon         6    52.0    2    0.75     0.0   70    72           72    +2
3    Coffeeberry          5    56.5    3    1.50     0.0   80    80           80    +0
4    Power Ranger         7    59.0    4    2.00     0.0   85    85           85    +0
5    Aerial Display       5    55.5    5    4.50     0.0   78    75           75    -3
6    Bugatti Blue         7    60.0    6    12.60    0.0   87    84           84    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 My Secret Place 77 71 77 -6 0.0 -
2 Captive Moon 70 75 72 +3 0.0 -
3 Coffeeberry Line 80 72 80 -8 0.0
4 Power Ranger 85 69 85 -16 0.0 -
5 Aerial Display 78 68 75 -7 0.0 -
6 Bugatti Blue 87 87 84 +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