Official NHA Assessment

Race 3: NIGHTINGALE PINNACLE STAKES (Open)

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Line Horse
Zeus
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
6 / 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    Shangani             4    62.0    1    0.00     3.0   117   120          120   +3
2    Imperial Master      4    50.0    2    2.25     3.0   89    100          100   +11
3    Zeus                 3    56.0    3    3.50     6.0   104   104          104   +0
4    Marchingontogether   6    56.0    4    4.25     0.0   102   116          116   +14
5    Arumugam             6    52.0    5    7.50     0.0   94    106          106   +12
6    Imperial Ruby        5    56.0    6    99.99    0.0   105   114          114   +9
99   Youcanthurrylove     5    48.5    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 Shangani 117 118 120 -2 3.0 -
2 Imperial Master 89 90 100 -10 3.0 -
3 Zeus Line 104 117 104 +13 6.0
4 Marchingontogether 102 102 116 -14 0.0 -
5 Arumugam 94 74 106 -32 0.0 -
6 Imperial Ruby 105 105 114 -9 0.0 -
99 Youcanthurrylove - 86 99 -13 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