Official NHA Assessment

Race 1: 4RACING WELCOMES YOU WORK RIDERS MAIDEN PLATE (For all Maidens)

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Line Horse
Heroic Act
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
2 / 6
Within 2 points
Significant Diffs
4 / 6
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    Samuel Sharpe        3    58.5    1    0.00     2.5   72    60           60    -12
2    Epidaurus            3    60.0    2    4.25     2.5   61    64           64    +3
3    Heroic Act           3    60.0    3    4.85     2.5   63    63           63    +0
4    Comic Artist         2    56.5    4    7.35     0.0   70    61           61    -9
5    Captain's Express    3    60.0    5    14.85    2.5   57    63           63    +6
6    Jabberwocky          4    60.0    6    24.60    1.0   48    66           66    +18
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Samuel Sharpe 72 74 60 +14 2.5 -
2 Epidaurus 61 63 64 -1 2.5 -
3 Heroic Act Line 63 62 63 -1 2.5
4 Comic Artist 70 67 61 +6 0.0 -
5 Captain's Express 57 55 63 -8 2.5 -
6 Jabberwocky 48 45 66 -21 1.0 -
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