Official NHA Assessment

Race 4: WSB GRAND HERITAGE 10 DECEMBER MAIDEN PLATE (For all Maidens)

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Line Horse
Black Lightning
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
3 / 9
Within 2 points
Significant Diffs
3 / 9
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    We've Got Tonight    3    59.0    1    0.00     5.0   -     58           6     +6
2    Vitellius            5    59.0    2    0.75     0.0   -     72           72    +72
3    Camlicourt           2    59.0    3    2.25     0.0   -     71           71    +71
4    Bye Bye Birdie       3    58.5    4    3.50     5.0   54    58           58    +4
5    Black Lightning      2    59.0    5    7.00     0.0   68    68           68    +0
6    Carnelo              6    60.0    6    7.75     0.0   60    70           70    +10
7    Elducino             3    57.5    7    10.75    5.0   -     55           55    +55
8    Punta Alta           2    56.0    8    16.00    0.0   -     62           62    +62
99   Fog Bank             2    59.0    99   0.00     0.0   -     68           68    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 We've Got Tonight - 75 6 +69 5.0 -
2 Vitellius - 73 72 +1 0.0 -
3 Camlicourt - 66 71 -5 0.0 -
4 Bye Bye Birdie 54 57 58 -1 5.0 -
5 Black Lightning Line 68 64 68 -4 0.0
6 Carnelo 60 75 70 +5 0.0 -
7 Elducino - 56 55 +1 5.0 -
8 Punta Alta - 50 62 -12 0.0 -
99 Fog Bank - 75 68 +7 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