Official NHA Assessment

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

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Line Horse
Thunderstruck
Reference for assessment
Exact Matches
1 / 17
Calculated = Official
Close Matches
6 / 17
Within 2 points
Significant Diffs
7 / 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    Gladatorian          5    56.0    1    0.00     0.0   110   114          114   +4
2    Thunderstruck        2    58.0    2    0.20     0.5   117   117          117   +0
3    Surjay               3    60.0    3    0.80     1.5   119   119          119   +0
4    Cold Fact            3    55.5    4    2.20     1.5   115   110          110   -5
4    Silver Operator      5    58.0    4    2.20     0.0   116   118          118   +2
6    Gobsmacked           2    55.5    6    2.50     0.5   113   112          112   -1
7    Sun Blushed          2    54.0    7    3.60     0.5   106   109          109   +3
8    Cosmic Highway       3    58.0    8    3.90     1.5   113   115          115   +2
9    Stiptelik (AUS)      3    53.5    9    4.10     1.5   107   106          106   -1
10   Sheldon              6    54.0    10   4.25     0.0   106   110          110   +4
11   Iphiko               3    53.5    11   4.65     1.5   109   106          106   -3
12   Full Velocity        4    53.5    12   5.55     2.0   108   105          105   -3
13   Sweet Pepper         2    51.5    13   5.75     0.5   107   104          104   -3
14   Pearl Of Asia        5    58.0    14   6.05     0.0   112   118          118   +6
99   Tempting Fate        4    56.0    99   0.00     2.0   -     110          110   +0
99   Whoa Whoa Whoa (AUS  3    53.5    99   0.00     1.5   -     106          106   +0
99   Miss Daisy           2    51.5    99   0.00     0.5   -     104          104   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Gladatorian 110 127 114 +13 0.0 -
2 Thunderstruck Line 117 128 117 +11 0.5
3 Surjay 119 121 119 +2 1.5 -
4 Cold Fact 115 109 110 -1 1.5 -
4 Silver Operator 116 115 118 -3 0.0 -
6 Gobsmacked 113 106 112 -6 0.5 -
7 Sun Blushed 106 120 109 +11 0.5 -
8 Cosmic Highway 113 115 115 ✓ Match 1.5 -
9 Stiptelik (AUS) 107 104 106 -2 1.5 -
10 Sheldon 106 106 110 -4 0.0 -
11 Iphiko 109 111 106 +5 1.5 -
12 Full Velocity 108 94 105 -11 2.0 -
13 Sweet Pepper 107 105 104 +1 0.5 -
14 Pearl Of Asia 112 107 118 -11 0.0 -
99 Tempting Fate - 103 110 -7 2.0 -
99 Whoa Whoa Whoa (AUS) - 108 106 +2 1.5 -
99 Miss Daisy - 108 104 +4 0.5 -
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