Official NHA Assessment

Race 8: WSB MR 78 HANDICAP (Open)

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Line Horse
Ragnar Lothbrok
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
0 / 12
Within 2 points
Significant Diffs
9 / 12
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    Dean Street          3    59.0    1    0.00     2.5   79    79           79    +0
2    Bluff On Bluff       3    58.0    2    0.75     2.5   77    77           77    +0
3    Ragnar Lothbrok      3    55.5    3    1.50     2.5   72    72           72    +0
4    On The Road Again    3    57.0    4    1.60     2.5   75    75           75    +0
5    Silver Salmon        3    60.0    5    2.85     2.5   81    81           81    +0
6    What A Bolt          3    57.0    6    3.35     2.5   75    75           75    +0
7    Auld Mug             3    56.0    7    4.60     2.5   73    73           73    +0
8    Superior Leader      4    55.0    8    5.00     0.0   67    76           76    +9
9    Baltimore Jack       5    58.5    9    7.00     0.0   75    83           83    +8
10   Power Grid           8    60.5    10   9.25     0.0   79    87           87    +8
11   Persistance          3    56.0    11   10.75    2.5   73    73           73    +0
12   Mr Frostie           4    52.0    12   11.05    0.0   60    70           70    +10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Dean Street 79 102 79 +23 2.5 -
2 Bluff On Bluff 77 80 77 +3 2.5 -
3 Ragnar Lothbrok Line 72 81 72 +9 2.5
4 On The Road Again 75 79 75 +4 2.5 -
5 Silver Salmon 81 65 81 -16 2.5 -
6 What A Bolt 75 72 75 -3 2.5 -
7 Auld Mug 73 59 73 -14 2.5 -
8 Superior Leader 67 64 76 -12 0.0 -
9 Baltimore Jack 75 72 83 -11 0.0 -
10 Power Grid 79 67 87 -20 0.0 -
11 Persistance 73 50 73 -23 2.5 -
12 Mr Frostie 60 51 70 -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