Official NHA Assessment

Race 6: INDIGO HEALTH SUPPLEMENTS MR 86 HANDICAP (Open)

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Line Horse
Hemisphere
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
6 / 9
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    Rafa Bay             2    55.0    1    0.00     1.0   78    80           78    +0
2    Hemisphere           3    55.5    2    2.70     2.0   79    79           79    +0
3    Dontshootthebarman   5    62.5    3    3.00     0.0   91    97           97    +6
4    Bourbon Reserve      2    59.0    4    4.30     1.0   86    88           88    +2
5    John Wick            2    58.5    5    5.20     1.0   83    87           87    +4
6    Nkandla Gold         4    55.0    6    6.00     2.5   76    77           77    +1
7    Halcyon              3    57.5    7    6.20     2.0   83    83           83    +0
8    What A Tiger         5    58.5    8    6.60     0.0   83    89           89    +6
9    Aussenkehr           2    59.0    9    16.00    1.0   84    88           88    +4
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Rafa Bay 78 96 78 +18 1.0 -
2 Hemisphere Line 79 83 79 +4 2.0
3 Dontshootthebarman 91 93 97 -4 0.0 -
4 Bourbon Reserve 86 82 88 -6 1.0 -
5 John Wick 83 82 87 -5 1.0 -
6 Nkandla Gold 76 63 77 -14 2.5 -
7 Halcyon 83 72 83 -11 2.0 -
8 What A Tiger 83 71 89 -18 0.0 -
9 Aussenkehr 84 79 88 -9 1.0 -
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