Official NHA Assessment

Race 7: TAB COLORADO KING STAKES (Grade 2) (Horses at Weight for Age + Penalties)

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Line Horse
The Ultimate King
Reference for assessment
Exact Matches
1 / 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    Fire Attack          3    60.0    1    0.00     3.5   124   115          115   -9
2    Choisaanada          2    58.0    2    0.60     0.0   121   125          125   +4
3    The Ultimate King    3    58.0    3    0.80     3.5   117   117          117   +0
4    Copper Eagle         2    54.5    4    1.05     0.0   97    117          117   +20
5    Field Marshal        3    58.0    5    1.25     3.5   110   117          117   +7
6    Atticus Finch        5    59.0    6    5.75     0.0   127   120          120   -7
99   Bakwena              3    55.5    99   0.00     3.5   -     106          106   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Fire Attack 124 124 115 +9 3.5 -
2 Choisaanada 121 121 125 -4 0.0 -
3 The Ultimate King Line 117 117 117 ✓ Match 3.5
4 Copper Eagle 97 110 117 -7 0.0 -
5 Field Marshal 110 110 117 -7 3.5 -
6 Atticus Finch 127 127 120 +7 0.0 -
99 Bakwena - 97 106 -9 3.5 -
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