Official NHA Assessment

Race 6: MERCURY SPRINT (Grade 1) (Horses at Weight-For-Age)

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Line Horse
Captain's Ransom
Reference for assessment
Exact Matches
1 / 17
Calculated = Official
Close Matches
2 / 17
Within 2 points
Significant Diffs
15 / 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    Captain's Ransom     4    57.5    1    0.00     2.0   124   124          124   +0
2    William Robertson    6    59.5    2    0.40     0.0   117   132          132   +15
3    Big Burn             3    57.0    3    1.30     1.5   122   124          124   +2
4    Gallic Princess      5    57.5    4    2.60     0.0   115   128          128   +13
5    Good Traveller       6    59.5    5    2.65     0.0   118   132          132   +14
6    Master Archie        3    59.5    6    3.65     1.5   125   129          129   +4
7    Zarina               4    57.5    7    3.90     2.0   111   124          124   +13
8    Chimichuri Run       6    60.0    8    4.05     0.0   115   133          133   +18
9    Bohica               5    60.0    9    4.45     0.0   125   133          133   +8
10   Supreme Quest        3    57.0    10   4.60     1.5   108   124          124   +16
11   Battle Force         4    60.0    11   5.00     2.0   118   129          129   +11
12   Alesian Chief        3    59.5    12   5.30     1.5   123   129          129   +6
13   Smorgasbord          6    59.5    13   6.30     0.0   118   132          132   +14
14   Val d'Orcia          3    59.5    14   99.99    1.5   111   129          129   +18
99   Kayla's Champ        5    57.5    99   0.00     0.0   -     128          128   +0
99   Eden Roc             5    60.0    99   0.00     0.0   -     133          133   +0
99   Ultra Magnus         6    60.0    99   0.00     0.0   -     133          133   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Captain's Ransom Line 124 124 124 ✓ Match 2.0
2 William Robertson 117 124 132 -8 0.0 -
3 Big Burn 122 115 124 -9 1.5 -
4 Gallic Princess 115 115 128 -13 0.0 -
5 Good Traveller 118 108 132 -24 0.0 -
6 Master Archie 125 128 129 -1 1.5 -
7 Zarina 111 111 124 -13 2.0 -
8 Chimichuri Run 115 115 133 -18 0.0 -
9 Bohica 125 125 133 -8 0.0 -
10 Supreme Quest 108 92 124 -32 1.5 -
11 Battle Force 118 109 129 -20 2.0 -
12 Alesian Chief 123 123 129 -6 1.5 -
13 Smorgasbord 118 77 132 -55 0.0 -
14 Val d'Orcia 111 105 129 -24 1.5 -
99 Kayla's Champ - 77 128 -51 0.0 -
99 Eden Roc - 98 133 -35 0.0 -
99 Ultra Magnus - 98 133 -35 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