Official NHA Assessment

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Line Horse
Passage Of Power
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
6 / 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    African Skyline      6    56.5    1    0.00     0.0   80    80           80    +0
2    Ideal Act            3    60.0    2    0.80     1.5   87    84           84    -3
3    Passage Of Power     6    58.0    3    1.30     0.0   83    83           83    +0
3    Justaguything        5    55.5    3    1.30     0.0   77    78           78    +1
5    The Tinkerman        3    58.5    5    2.60     1.5   84    81           81    -3
6    Captain Who          4    57.0    6    3.00     2.0   80    77           77    -3
7    Herecomestherain     4    59.0    7    3.10     2.0   84    81           81    -3
8    Mini Coop            3    55.0    8    3.40     1.5   77    74           74    -3
9    Majorca Palace       4    53.0    9    3.70     2.0   75    69           69    -6
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 African Skyline 80 98 80 +18 0.0 -
2 Ideal Act 87 86 84 +2 1.5 -
3 Passage Of Power Line 83 76 83 -7 0.0
3 Justaguything 77 87 78 +9 0.0 -
5 The Tinkerman 84 76 81 -5 1.5 -
6 Captain Who 80 65 77 -12 2.0 -
7 Herecomestherain 84 55 81 -26 2.0 -
8 Mini Coop 77 76 74 +2 1.5 -
9 Majorca Palace 75 51 69 -18 2.0 -
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