Official NHA Assessment

Race 3: CHIBUKU SUPER MERIT RATED 75 HANDICAP (F&M) (Open)

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Line Horse
Ian's Ferrari
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
5 / 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    When Evening Comes   5    53.5    1    0.00     0.0   60    63           60    +0
2    Copper Fire          3    52.0    2    0.50     2.5   60    60           60    +0
3    Ian's Ferrari        3    60.0    3    2.50     2.5   73    73           73    +0
4    Burn Bright          3    52.0    4    6.00     2.5   62    55           55    -7
5    Cutback              6    60.0    5    7.75     0.0   73    76           76    +3
6    New Galaxy           4    52.5    6    9.00     1.0   58    59           59    +1
99   Jet Green            4    54.0    99   0.00     1.0   -     62           62    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 When Evening Comes 60 58 60 -2 0.0 -
2 Copper Fire 60 60 60 ✓ Match 2.5 -
3 Ian's Ferrari Line 73 63 73 -10 2.5
4 Burn Bright 62 68 55 +13 2.5 -
5 Cutback 73 63 76 -13 0.0 -
6 New Galaxy 58 45 59 -14 1.0 -
99 Jet Green - 54 62 -8 1.0 -
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