Official NHA Assessment

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

Back to Race
Line Horse
Surjay
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
2 / 13
Within 2 points
Significant Diffs
11 / 13
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Isivunguvungu        3    60.0    1    0.00     1.5   130   119          119   -11
2    Surjay               3    60.0    2    0.30     1.5   119   119          119   +0
3    Thunderstruck        2    59.5    3    0.60     0.5   117   120          120   +3
4    Gimme A Prince       3    60.0    4    1.60     1.5   130   119          120   -10
5    William Robertson    6    60.0    5    1.80     0.0   125   122          122   -3
6    Gladatorian          5    59.5    6    2.60     0.0   114   121          121   +7
7    Cabinet Shuffle      4    60.0    7    3.00     2.0   102   118          118   +16
8    Danilo Danilovitch   3    60.0    8    3.30     1.5   108   119          119   +11
9    Seeking The Stars    7    60.0    9    3.60     0.0   123   122          122   -1
10   Val d'Orcia          3    60.0    10   6.70     1.5   103   119          119   +16
11   Silver Operator      5    60.0    11   7.50     0.0   114   122          122   +8
12   Pearl Of Asia        5    60.0    12   9.70     0.0   109   122          122   +13
99   Sheela               3    57.5    99   0.00     1.5   -     114          114   +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Isivunguvungu 130 130 119 +11 1.5 -
2 Surjay Line 119 121 119 +2 1.5
3 Thunderstruck 117 128 120 +8 0.5 -
4 Gimme A Prince 130 134 120 +14 1.5 -
5 William Robertson 125 124 122 +2 0.0 -
6 Gladatorian 114 127 121 +6 0.0 -
7 Cabinet Shuffle 102 76 118 -42 2.0 -
8 Danilo Danilovitch 108 89 119 -30 1.5 -
9 Seeking The Stars 123 116 122 -6 0.0 -
10 Val d'Orcia 103 105 119 -14 1.5 -
11 Silver Operator 114 115 122 -7 0.0 -
12 Pearl Of Asia 109 107 122 -15 0.0 -
99 Sheela - 121 114 +7 1.5 -
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