Official NHA Assessment

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

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Line Horse
Royale Jacket
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
6 / 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    Stokesy              3    60.0    1    0.00     5.0   76    68           68    -8
2    Terrence             3    60.0    2    2.40     5.0   67    70           70    +3
3    Royale Jacket        2    60.0    3    3.60     0.0   79    79           79    +0
4    Samuel Sharpe        3    60.0    4    3.90     5.0   -     69           69    +69
5    Underdog             3    60.0    5    4.15     5.0   58    69           69    +11
6    Cuzzie               3    60.0    6    11.35    5.0   53    68           68    +15
7    Jabberwocky          4    60.0    7    99.97    2.5   56    73           73    +17
99   Second To Nunn       2    60.0    99   0.00     0.0   -     78           78    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Stokesy 76 81 68 +13 5.0 -
2 Terrence 67 78 70 +8 5.0 -
3 Royale Jacket Line 79 74 79 -5 0.0
4 Samuel Sharpe - 73 69 +4 5.0 -
5 Underdog 58 58 69 -11 5.0 -
6 Cuzzie 53 54 68 -14 5.0 -
7 Jabberwocky 56 53 73 -20 2.5 -
99 Second To Nunn - 67 78 -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