Official NHA Assessment

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Line Horse
Mayor Of Merrivale
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
5 / 8
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    Laudato              2    58.0    1    0.00     0.0   75    57           57    -18
2    Future Flo           4    56.5    2    1.40     4.0   86    49           76    -10
3    Mayor Of Merrivale   2    60.0    3    2.00     0.0   64    64           64    +0
4    Hiawatha Goldberg    2    58.0    4    3.40     0.0   71    58           61    -10
5    Helsinki             2    58.0    5    5.30     0.0   80    57           70    -10
6    Venerable            3    60.0    6    9.60     7.0   64    47           54    -10
7    Silver Alert         3    54.0    7    10.30    7.0   65    35           55    -10
8    The Noah             2    58.0    8    13.70    0.0   67    57           57    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Laudato 75 84 57 +27 0.0 -
2 Future Flo 86 95 76 +19 4.0 -
3 Mayor Of Merrivale Line 64 59 64 -5 0.0
4 Hiawatha Goldberg 71 57 61 -4 0.0 -
5 Helsinki 80 72 70 +2 0.0 -
6 Venerable 64 62 54 +8 7.0 -
7 Silver Alert 65 62 55 +7 7.0 -
8 The Noah 67 68 57 +11 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