Official NHA Assessment

Race 5: PERFECTLY PLACED APPRENTICE CLASS 5 (Open. Benchmark at 60.0kg = 70)

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Line Horse
Winter Pearl
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
2 / 7
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    Avignon              4    53.0    1    0.00     3.5   61    57           57    -4
2    Ozark                4    51.5    2    0.40     3.5   61    54           54    -7
3    Winter Pearl         6    56.5    3    0.90     0.0   71    71           71    +0
4    Jet A One            2    59.5    4    3.90     2.0   69    73           73    +4
5    Fort Red             4    54.0    5    5.65     3.5   66    59           59    -7
6    Bonne Bouche         2    56.0    6    9.65     2.0   67    66           66    -1
7    Gravity              4    54.0    7    13.15    3.5   63    59           59    -4
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Avignon 61 61 57 +4 3.5 -
2 Ozark 61 61 54 +7 3.5 -
3 Winter Pearl Line 71 71 71 ✓ Match 0.0
4 Jet A One 69 69 73 -4 2.0 -
5 Fort Red 66 66 59 +7 3.5 -
6 Bonne Bouche 67 67 66 +1 2.0 -
7 Gravity 63 63 59 +4 3.5 -
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