Official NHA Assessment

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Line Horse
Vision Of Will
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
3 / 10
Within 2 points
Significant Diffs
4 / 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    Maquette             3    61.5    1    0.00     3.0   70    70           70    +0
2    Shona Kirsty Yves    3    60.0    2    0.90     3.0   74    67           67    -7
3    Vision Of Will       3    57.5    3    1.00     3.0   62    62           62    +0
4    Princess Santo       4    52.0    4    1.25     3.5   51    50           50    -1
5    Triptoroyalty        2    56.0    5    1.95     2.0   66    61           61    -5
6    Pantea               3    56.5    6    2.75     3.0   63    60           60    -3
7    In The Ether         6    59.0    7    2.95     0.0   65    71           71    +6
8    Victory Belle        3    57.0    8    3.10     3.0   61    61           61    +0
9    Flying The Star      4    55.5    9    5.90     3.5   58    57           57    -1
10   Rio's Kiss           3    53.5    10   6.20     3.0   54    54           54    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Maquette 70 91 70 +21 3.0 -
2 Shona Kirsty Yves 74 60 67 -7 3.0 -
3 Vision Of Will Line 62 66 62 +4 3.0
4 Princess Santo 51 50 50 ✓ Match 3.5 -
5 Triptoroyalty 66 56 61 -5 2.0 -
6 Pantea 63 57 60 -3 3.0 -
7 In The Ether 65 63 71 -8 0.0 -
8 Victory Belle 61 60 61 -1 3.0 -
9 Flying The Star 58 67 57 +10 3.5 -
10 Rio's Kiss 54 52 54 -2 3.0 -
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