Official NHA Assessment

Race 4: CELEBRATING CENTURION MEMBER MARK CURRIE'S BIRTHDAY B STAKES (For All Horses with a nett rating of 101 & below)

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Line Horse
Captain West
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
4 / 8
Within 2 points
Significant Diffs
3 / 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    Air Raid             2    60.5    1    0.00     0.0   97    97           97    +0
2    Dawn Till Dusk       2    58.5    2    0.05     0.0   93    93           93    +0
3    Green Garnet         4    55.5    3    0.45     0.5   82    91           91    +9
4    Captain West         3    61.5    4    1.45     1.5   99    99           99    +0
5    World Of Pleasure    3    57.0    5    2.20     1.5   89    90           90    +1
6    Please Be True       2    57.0    6    2.50     0.0   89    92           92    +3
7    Kelp Forest          5    57.0    7    2.70     0.0   85    92           92    +7
8    Innamorare           5    60.0    8    3.20     0.0   91    98           98    +7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Air Raid 97 95 97 -2 0.0 -
2 Dawn Till Dusk 93 94 93 +1 0.0 -
3 Green Garnet 82 81 91 -10 0.5 -
4 Captain West Line 99 102 99 +3 1.5
5 World Of Pleasure 89 89 90 -1 1.5 -
6 Please Be True 89 93 92 +1 0.0 -
7 Kelp Forest 85 81 92 -11 0.0 -
8 Innamorare 91 91 98 -7 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