Official NHA Assessment

Race 2: TAB 4RACING APP MR 95 OPEN HANDICAP (3 years old) (3 year olds)

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Line Horse
Rule By Force
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
0 / 10
Within 2 points
Significant Diffs
9 / 10
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    Tsar Bomba           3    56.5    1    0.00     7.0   88    86           88    +0
2    Rule By Force        3    53.5    2    3.25     7.0   82    82           82    +0
3    Just Eminent         3    52.5    3    3.35     7.0   75    79           79    +4
4    Mescal               2    52.0    4    4.00     0.0   76    92           92    +16
5    Star Coin            5    56.5    5    5.75     0.0   88    100          100   +12
6    Samthewiseman        5    52.0    6    6.00     0.0   72    91           91    +19
7    Acorn                2    58.0    7    7.00     0.0   91    103          103   +12
8    A Colourful Past     2    52.0    8    12.00    0.0   74    91           91    +17
99   Kalahari Blue        2    53.5    99   0.00     0.0   -     94           94    +0
99   Ridgerunner          2    58.5    99   0.00     0.0   -     104          104   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Tsar Bomba 88 91 88 +3 7.0 -
2 Rule By Force Line 82 117 82 +35 7.0
3 Just Eminent 75 60 79 -19 7.0 -
4 Mescal 76 64 92 -28 0.0 -
5 Star Coin 88 78 100 -22 0.0 -
6 Samthewiseman 72 52 91 -39 0.0 -
7 Acorn 91 89 103 -14 0.0 -
8 A Colourful Past 74 66 91 -25 0.0 -
99 Kalahari Blue - 75 94 -19 0.0 -
99 Ridgerunner - 90 104 -14 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