Official NHA Assessment

Race 4: WSB Spin with the Best PINNACLE STAKES (For all horses)

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Line Horse
Russian Rock
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
4 / 11
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 Fontane      4    59.0    1    0.00     0.5   106   103          103   -3
2    Russian Rock         4    59.0    2    0.50     0.5   108   108          108   +0
3    Do It Again          7    62.0    3    1.20     0.0   124   114          114   -10
4    Imposing             2    54.0    4    2.60     0.0   100   96           96    -4
5    Future Prince        3    55.5    5    3.00     2.0   96    95           95    -1
6    Union Square         2    60.5    6    4.40     0.0   116   107          107   -9
7    Astrix               5    62.0    7    6.90     0.0   122   110          112   -10
8    Priceless Ruler      6    58.0    8    8.80     0.0   102   102          102   +0
99   Arctic Drift         5    56.0    99   0.00     0.0   -     98           98    +0
99   Boundless Bash       2    53.5    99   0.00     0.0   -     93           93    +0
99   Captain Casey        2    57.0    99   0.00     0.0   -     100          100   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Captain Fontane 106 109 103 +6 0.5 -
2 Russian Rock Line 108 105 108 -3 0.5
3 Do It Again 124 121 114 +7 0.0 -
4 Imposing 100 107 96 +11 0.0 -
5 Future Prince 96 93 95 -2 2.0 -
6 Union Square 116 110 107 +3 0.0 -
7 Astrix 122 118 112 +6 0.0 -
8 Priceless Ruler 102 99 102 -3 0.0 -
99 Arctic Drift - 97 98 -1 0.0 -
99 Boundless Bash - 92 93 -1 0.0 -
99 Captain Casey - 96 100 -4 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