Official NHA Assessment

Race 9: POST MERCHANTS (Grade 2) (Open)

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Line Horse
Eden Roc
Reference for assessment
Exact Matches
1 / 17
Calculated = Official
Close Matches
4 / 17
Within 2 points
Significant Diffs
10 / 17
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    Val d'Orcia          3    54.0    1    0.00     1.5   105   103          103   -2
2    Good Traveller       6    58.0    2    0.50     0.0   116   114          114   -2
3    Sheela               3    51.5    3    1.60     1.5   107   98           98    -9
4    Eden Roc             5    56.0    4    1.70     0.0   110   110          110   +0
5    William Robertson    6    58.0    5    1.75     0.0   117   114          114   -3
6    Coin Spinner         3    52.0    6    2.05     1.5   97    99           99    +2
7    Isivunguvungu        3    54.0    7    2.45     1.5   103   103          103   +0
8    Socrates             7    56.0    8    2.50     0.0   111   110          110   -1
9    Vars Vicky           4    56.0    9    2.80     2.0   111   106          106   -5
10   Sound Of Warning     3    55.5    10   3.30     1.5   116   106          106   -10
11   Bartholdi            4    58.0    11   4.90     2.0   115   110          110   -5
12   Pearl Of Asia        5    58.0    12   4.95     0.0   115   114          114   -1
13   Mr Cobbs             5    56.0    13   5.70     0.0   108   110          110   +2
14   Chantyman            7    60.0    14   8.90     0.0   117   118          118   +1
99   Kwinta's Light       3    51.5    99   0.00     1.5   -     98           98    +0
99   Captain Fontane      4    54.0    99   0.00     2.0   -     102          102   +0
99   After The Rain       4    52.0    99   0.00     2.0   -     98           98    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Val d'Orcia 105 105 103 +2 1.5 -
2 Good Traveller 116 108 114 -6 0.0 -
3 Sheela 107 121 98 +23 1.5 -
4 Eden Roc Line 110 98 110 -12 0.0
5 William Robertson 117 124 114 +10 0.0 -
6 Coin Spinner 97 101 99 +2 1.5 -
7 Isivunguvungu 103 130 103 +27 1.5 -
8 Socrates 111 111 110 +1 0.0 -
9 Vars Vicky 111 116 106 +10 2.0 -
10 Sound Of Warning 116 110 106 +4 1.5 -
11 Bartholdi 115 117 110 +7 2.0 -
12 Pearl Of Asia 115 107 114 -7 0.0 -
13 Mr Cobbs 108 106 110 -4 0.0 -
14 Chantyman 117 114 118 -4 0.0 -
99 Kwinta's Light - 109 98 +11 1.5 -
99 Captain Fontane - 109 102 +7 2.0 -
99 After The Rain - 98 98 ✓ Match 2.0 -
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