Official NHA Assessment

Race 6: TABGOLD SCORE 6 SCORE 8 SCORE 10 CLASS 5 (Open. Benchmark at 60.0kg = 66)

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Line Horse
Porfirio
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
4 / 10
Within 2 points
Significant Diffs
6 / 10
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    Phaka Imali          3    60.0    1    0.00     4.0   66    56           56    -10
2    Lake Como            3    57.0    2    1.90     4.0   60    53           53    -7
3    Attaboy              2    55.5    3    2.50     0.0   65    57           57    -8
4    Porfirio             6    58.0    4    2.60     0.0   62    62           62    +0
5    Mac Hardy            4    55.5    5    2.65     2.5   57    52           52    -5
6    Brass Bell           8    55.5    6    2.95     0.0   57    57           57    +0
7    Iron Will            4    61.0    7    4.00     2.5   68    62           62    -6
8    Count Marsh          7    54.0    8    5.05     0.0   54    52           52    -2
9    Crested Eagle        3    51.5    9    6.45     4.0   52    39           42    -10
99   Brave Voyager        3    56.5    99   0.00     4.0   -     49           49    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Phaka Imali 66 62 56 +6 4.0 -
2 Lake Como 60 61 53 +8 4.0 -
3 Attaboy 65 65 57 +8 0.0 -
4 Porfirio Line 62 88 62 +26 0.0
5 Mac Hardy 57 64 52 +12 2.5 -
6 Brass Bell 57 55 57 -2 0.0 -
7 Iron Will 68 63 62 +1 2.5 -
8 Count Marsh 54 52 52 ✓ Match 0.0 -
9 Crested Eagle 52 51 42 +9 4.0 -
99 Brave Voyager - 51 49 +2 4.0 -
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