Official NHA Assessment

Race 7: TAB COLORADO KING STAKES (Grade 2) (Open)

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Line Horse
Hotarubi
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
3 / 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    Pure Predator        2    54.5    1    0.00     0.0   116   111          111   -5
2    Hotarubi             4    54.5    2    0.75     1.5   114   114          114   +0
3    Puerto Manzano (ARG  4    60.0    3    4.00     1.5   125   121          121   -4
4    Aragosta             3    58.0    4    4.05     3.5   118   113          113   -5
5    Safe Passage         3    58.0    5    4.25     3.5   115   113          113   -2
6    Future Pearl         2    58.0    6    9.75     0.0   116   118          118   +2
7    Second Base          4    58.0    7    11.25    1.5   107   115          115   +8
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Pure Predator 116 118 111 +7 0.0 -
2 Hotarubi Line 114 98 114 -16 1.5
3 Puerto Manzano (ARG) 125 119 121 -2 1.5 -
4 Aragosta 118 109 113 -4 3.5 -
5 Safe Passage 115 108 113 -5 3.5 -
6 Future Pearl 116 114 118 -4 0.0 -
7 Second Base 107 99 115 -16 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