Official NHA Assessment

Race 1: 4RACING WELCOMES YOU MIDDLE STAKES (For horses with nett rating of 101 and below)

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Line Horse
Namaqua Blossom
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
4 / 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    Rule Book            6    58.0    1    0.00     0.0   85    98           91    +6
2    Positive Attitude    6    56.0    2    0.25     0.0   79    94           94    +15
3    Namaqua Blossom      3    53.5    3    1.40     7.0   80    80           80    +0
4    Arlington Action     6    58.0    4    5.50     0.0   82    98           98    +16
5    Professor Snape      2    58.0    5    18.00    0.0   87    98           98    +11
6    Absolute Value       3    60.0    6    18.05    7.0   87    88           88    +1
7    The Kop              4    56.0    7    21.00    3.5   80    87           87    +7
99   Millahue             3    60.0    99   0.00     7.0   -     88           88    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rule Book 85 92 91 +1 0.0 -
2 Positive Attitude 79 90 94 -4 0.0 -
3 Namaqua Blossom Line 80 75 80 -5 7.0
4 Arlington Action 82 73 98 -25 0.0 -
5 Professor Snape 87 68 98 -30 0.0 -
6 Absolute Value 87 84 88 -4 7.0 -
7 The Kop 80 78 87 -9 3.5 -
99 Millahue - 81 88 -7 7.0 -
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