Official NHA Assessment

Race 7: WALTER FAIRRALL CLASS 5 (Open. Benchmark at 60.0kg = 66)

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Line Horse
Lake Como
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
5 / 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    Run To Rio           4    59.5    1    0.00     0.5   65    72           71    +6
2    Danube               3    57.5    2    0.40     1.5   73    71           71    -2
3    Attaboy              2    54.0    3    0.45     0.0   62    67           67    +5
4    Lake Como            3    56.0    4    1.65     1.5   66    66           66    +0
5    Ultra Quick          6    61.0    5    1.85     0.0   68    79           79    +11
6    Beach Palace         4    61.5    6    3.95     0.5   69    77           77    +8
7    Rafiki               2    61.5    7    5.05     0.0   69    77           77    +8
8    L'Ultimo             2    57.0    8    5.65     0.0   60    68           68    +8
9    Happy Wanderer       5    56.5    9    7.95     0.0   59    67           67    +8
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Run To Rio 65 71 71 ✓ Match 0.5 -
2 Danube 73 76 71 +5 1.5 -
3 Attaboy 62 65 67 -2 0.0 -
4 Lake Como Line 66 61 66 -5 1.5
5 Ultra Quick 68 71 79 -8 0.0 -
6 Beach Palace 69 67 77 -10 0.5 -
7 Rafiki 69 67 77 -10 0.0 -
8 L'Ultimo 60 61 68 -7 0.0 -
9 Happy Wanderer 59 55 67 -12 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