Official NHA Assessment

Race 8: TAB 4RACING APP MIDDLE STAKES (For horses with nett rating of 101 and below)

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Line Horse
Ragnar Lothbrok
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
6 / 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    Power Broker         2    58.0    1    0.00     4.0   91    96           96    +5
2    Ice Star             2    56.5    2    0.70     4.0   99    93           93    -6
3    Ragnar Lothbrok      3    56.0    3    2.60     6.0   88    88           88    +0
4    Bold Act             3    58.5    4    2.65     6.0   94    93           93    -1
5    Vegas Hi Rise        6    52.0    5    4.60     0.0   80    92           92    +12
6    Samuel Salt          3    52.5    6    6.00     6.0   85    81           81    -4
99   Moonshiningthrough   3    60.5    99   0.00     6.0   -     97           97    +0
99   Goliath Heron        6    56.0    99   0.00     0.0   -     100          100   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Power Broker 91 102 96 +6 4.0 -
2 Ice Star 99 112 93 +19 4.0 -
3 Ragnar Lothbrok Line 88 81 88 -7 6.0
4 Bold Act 94 77 93 -16 6.0 -
5 Vegas Hi Rise 80 71 92 -21 0.0 -
6 Samuel Salt 85 82 81 +1 6.0 -
99 Moonshiningthrough - 96 97 -1 6.0 -
99 Goliath Heron - 86 100 -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