Official NHA Assessment

Race 6: www.goldcircle.co.za PINNACLE STAKES (For all horses)

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Line Horse
Silver Operator
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
4 / 10
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    Look For Hounds      4    56.5    1    0.00     1.0   98    102          102   +4
2    Silver Operator      5    62.0    2    1.20     0.0   119   119          119   +0
3    Chattertons Keeper   5    56.5    3    1.60     0.0   101   107          107   +6
4    Tread Swiftly        4    56.0    4    7.10     1.0   97    101          101   +4
5    Ishnana              7    55.0    5    7.80     0.0   106   101          101   -5
6    Silvano's Timer      4    58.0    6    9.80     1.0   103   105          105   +2
99   Gentleman's Wager    7    59.0    99   0.00     0.0   -     109          109   +0
99   Tristful             6    60.5    99   0.00     0.0   -     112          112   +0
99   Glory Days           5    52.5    99   0.00     0.0   -     96           96    +0
99   Baby Shooz           5    54.0    99   0.00     0.0   -     99           99    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Look For Hounds 98 104 102 +2 1.0 -
2 Silver Operator Line 119 115 119 -4 0.0
3 Chattertons Keeper 101 98 107 -9 0.0 -
4 Tread Swiftly 97 90 101 -11 1.0 -
5 Ishnana 106 83 101 -18 0.0 -
6 Silvano's Timer 103 106 105 +1 1.0 -
99 Gentleman's Wager - 106 109 -3 0.0 -
99 Tristful - 107 112 -5 0.0 -
99 Glory Days - 92 96 -4 0.0 -
99 Baby Shooz - 73 99 -26 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