Official NHA Assessment

Race 6: TAB COLORADO KING STAKES (Grade 2) (Open)

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Line Horse
Navajo Nation
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
0 / 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    Let's Go Now         4    57.5    1    0.00     1.5   113   96           96    -17
2    Marauding Horde      4    60.0    2    0.30     1.5   108   108          108   +0
3    Hotarubi             4    60.0    3    3.30     1.5   112   104          104   -8
4    Navajo Nation        4    60.0    4    5.70     1.5   101   101          101   +0
5    Infinite Wonder      7    60.0    5    6.00     0.0   103   104          104   +1
6    Royal Edition        4    60.0    6    19.50    1.5   90    101          101   +11
99   La Moohal            4    60.0    99   0.00     1.5   -     101          101   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Let's Go Now 113 113 96 +17 1.5 -
2 Marauding Horde 108 112 108 +4 1.5 -
3 Hotarubi 112 98 104 -6 1.5 -
4 Navajo Nation Line 101 104 101 +3 1.5
5 Infinite Wonder 103 86 104 -18 0.0 -
6 Royal Edition 90 92 101 -9 1.5 -
99 La Moohal - 93 101 -8 1.5 -
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