Official NHA Assessment

Race 7: WWW.TAB4RACING.COM MR 66 HANDICAP (Open)

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Line Horse
Flag Bearer
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 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    Guy Alexander        3    61.0    1    0.00     8.0   68    64           68    +0
2    Flag Bearer          3    59.0    2    1.00     8.0   64    64           64    +0
3    Global Impact        2    61.0    3    1.10     0.0   68    84           84    +16
4    Silent Trigger       6    59.5    4    3.35     0.0   65    78           78    +13
5    Callaburn            2    59.5    5    4.25     0.0   66    78           78    +12
6    Rainy Season         4    53.0    6    7.75     4.5   52    55           55    +3
7    Perini Palace        4    54.0    7    26.75    4.5   54    57           57    +3
8    Ambitious Lady       3    57.0    8    28.75    8.0   66    56           56    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Guy Alexander 68 72 68 +4 8.0 -
2 Flag Bearer Line 64 60 64 -4 8.0
3 Global Impact 68 74 84 -10 0.0 -
4 Silent Trigger 65 60 78 -18 0.0 -
5 Callaburn 66 52 78 -26 0.0 -
6 Rainy Season 52 56 55 +1 4.5 -
7 Perini Palace 54 56 57 -1 4.5 -
8 Ambitious Lady 66 62 56 +6 8.0 -
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