Official NHA Assessment

Race 7: WSB AQUANAUT HANDICAP (Listed) (Open)

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Line Horse
Navajo Nation
Reference for assessment
Exact Matches
2 / 13
Calculated = Official
Close Matches
4 / 13
Within 2 points
Significant Diffs
3 / 13
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    Daimyo               3    57.5    1    0.00     5.0   99    93           99    +0
2    Aladdin's Lamp       4    59.5    2    2.30     2.0   103   107          107   +4
3    Enflame              3    55.5    3    3.30     5.0   96    91           91    -5
4    Navajo Nation        4    60.0    4    4.80     2.0   104   104          104   +0
5    Royal Invitation     5    57.5    5    6.70     0.0   99    103          103   +4
6    Battleground         5    54.5    6    8.50     0.0   92    97           97    +5
7    United Council       5    58.5    7    8.90     0.0   101   105          105   +4
8    Breeze Over          5    58.0    8    9.10     0.0   100   104          104   +4
9    Gimmeachoice         3    53.0    9    11.50    5.0   87    84           84    -3
10   Nebraas              8    58.5    10   12.75    0.0   101   105          105   +4
11   Euphrates            3    53.0    11   14.75    5.0   72    84           84    +12
12   Taxhaven             4    56.0    12   19.75    2.0   96    96           96    +0
13   Apache Son           4    53.0    13   23.25    2.0   89    90           90    +1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Daimyo 99 105 99 +6 5.0 -
2 Aladdin's Lamp 103 106 107 -1 2.0 -
3 Enflame 96 98 91 +7 5.0 -
4 Navajo Nation Line 104 104 104 ✓ Match 2.0
5 Royal Invitation 99 99 103 -4 0.0 -
6 Battleground 92 92 97 -5 0.0 -
7 United Council 101 100 105 -5 0.0 -
8 Breeze Over 100 99 104 -5 0.0 -
9 Gimmeachoice 87 87 84 +3 5.0 -
10 Nebraas 101 101 105 -4 0.0 -
11 Euphrates 72 70 84 -14 5.0 -
12 Taxhaven 96 96 96 ✓ Match 2.0 -
13 Apache Son 89 89 90 -1 2.0 -
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