Official NHA Assessment

Race 4: INDEPENDENT ON SATURDAY DRILL HALL STAKES (Grade 2) (Horses at Weight-For-Age + Penalties)

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Line Horse
Silver Operator
Reference for assessment
Exact Matches
0 / 14
Calculated = Official
Close Matches
0 / 14
Within 2 points
Significant Diffs
12 / 14
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    Silver Operator      5    57.0    1    0.00     0.0   119   119          119   +0
2    Russian Rock         4    57.0    2    0.15     0.5   117   118          118   +1
3    Smorgasbord          6    56.5    3    2.15     0.0   110   121          121   +11
4    Chimichuri Run       6    57.0    4    3.35     0.0   115   120          120   +5
5    Pearl Of Asia        5    60.0    5    4.55     0.0   119   125          125   +6
6    Jet Dark             4    60.0    6    4.65     0.5   130   124          124   -6
7    Seeking The Stars    7    58.5    7    5.40     0.0   124   122          122   -2
8    Good Traveller       6    58.0    8    6.40     0.0   116   121          121   +5
9    Linebacker           4    60.0    9    6.45     0.5   126   124          124   -2
10   Ikigai               8    57.0    10   7.15     0.0   110   119          119   +9
11   Eliud                4    57.0    11   8.05     0.5   112   118          118   +6
12   Captain Fontane      4    57.0    12   8.80     0.5   105   118          118   +13
13   Ultra Magnus         6    57.0    13   10.00    0.0   116   119          119   +3
14   Seven Patriots       5    57.0    14   45.00    0.0   96    119          119   +23
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Silver Operator Line 119 115 119 -4 0.0
2 Russian Rock 117 105 118 -13 0.5 -
3 Smorgasbord 110 77 121 -44 0.0 -
4 Chimichuri Run 115 115 120 -5 0.0 -
5 Pearl Of Asia 119 107 125 -18 0.0 -
6 Jet Dark 130 130 124 +6 0.5 -
7 Seeking The Stars 124 116 122 -6 0.0 -
8 Good Traveller 116 108 121 -13 0.0 -
9 Linebacker 126 108 124 -16 0.5 -
10 Ikigai 110 91 119 -28 0.0 -
11 Eliud 112 112 118 -6 0.5 -
12 Captain Fontane 105 109 118 -9 0.5 -
13 Ultra Magnus 116 98 119 -21 0.0 -
14 Seven Patriots 96 83 119 -36 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