Official NHA Assessment

Race 2: TRINITY PHARMA MIDDLE STAKES (For horses with nett rating of 96 and below)

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Line Horse
White Fang
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
7 / 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    Arlington Action     6    52.0    1    0.00     0.0   79    89           85    +6
2    White Fang           4    58.0    2    0.25     7.0   87    87           87    +0
3    Afraad               8    54.0    3    0.50     0.0   78    99           99    +21
4    Great Affair         7    54.0    4    2.30     0.0   81    97           97    +16
5    Captain Chorus       5    56.0    5    3.40     0.0   86    99           99    +13
6    Indian War Dance     3    50.0    6    8.10     10.5  66    64           64    -2
7    Dindingwe            4    57.5    7    10.80    7.0   92    86           86    -6
8    Sudden Star          5    60.0    8    99.99    0.0   95    105          105   +10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Arlington Action 79 73 85 -12 0.0 -
2 White Fang Line 87 91 87 +4 7.0
3 Afraad 78 79 99 -20 0.0 -
4 Great Affair 81 63 97 -34 0.0 -
5 Captain Chorus 86 67 99 -32 0.0 -
6 Indian War Dance 66 58 64 -6 10.5 -
7 Dindingwe 92 95 86 +9 7.0 -
8 Sudden Star 95 86 105 -19 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