Official NHA Assessment

Race 4: COASTAL HORSE CARE UNIT MAIDEN PLATE (For all Maidens)

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Line Horse
Rollo The Viking
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
7 / 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    Shiny Bob            4    60.0    1    0.00     5.0   70    8            8     -62
2    One Scotch           2    58.0    2    2.50     0.0   -     16           16    +16
3    Rollo The Viking     3    58.0    3    2.50     8.0   -     -            -     +0
4    Uncle Lucky          2    58.5    4    5.60     0.0   62    15           52    -10
5    See My Future        3    58.0    5    5.90     8.0   -     -2           -     +0
6    Freddy Slater        3    58.0    6    6.30     8.0   -     -2           -     +0
7    Warrior Class        2    58.0    7    12.40    0.0   66    14           56    -10
8    Kola Tonic           2    58.0    8    17.90    0.0   79    14           69    -10
9    Chasing Freedom      3    58.0    9    23.50    8.0   -     -2           -     +0
99   Amigo                4    60.0    99   0.00     5.0   69    8            69    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Shiny Bob 70 60 8 +52 5.0 -
2 One Scotch - 77 16 +61 0.0 -
3 Rollo The Viking Line - 96 - +96 8.0
4 Uncle Lucky 62 61 52 +9 0.0 -
5 See My Future - 71 - +71 8.0 -
6 Freddy Slater - 77 - +77 8.0 -
7 Warrior Class 66 61 56 +5 0.0 -
8 Kola Tonic 79 78 69 +9 0.0 -
9 Chasing Freedom - - - ✓ Match 8.0 -
99 Amigo 69 64 69 -5 5.0 -
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