Official NHA Assessment

Race 7: BETWAY PINNACLE STAKES (For all horses)

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Line Horse
Mercantour
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
5 / 7
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    Unzen                3    56.0    1    0.00     8.5   113   92           92    -21
2    Mercantour           5    52.0    2    2.00     0.0   104   104          104   +0
3    Zinovi               2    56.0    3    7.75     0.0   114   109          109   -5
4    Swing Upon A Star    2    52.0    4    9.85     0.0   102   101          101   -1
5    Puerto Manzano (ARG  4    62.0    5    10.65    6.0   123   109          113   -10
6    Taikonaut            2    52.0    6    10.75    0.0   104   101          101   -3
99   Tsar Bomba           3    50.0    99   0.00     8.5   -     80           80    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Unzen 113 116 92 +24 8.5 -
2 Mercantour Line 104 113 104 +9 0.0
3 Zinovi 114 120 109 +11 0.0 -
4 Swing Upon A Star 102 102 101 +1 0.0 -
5 Puerto Manzano (ARG) 123 119 113 +6 6.0 -
6 Taikonaut 104 104 101 +3 0.0 -
99 Tsar Bomba - 91 80 +11 8.5 -
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