Official NHA Assessment

Race 6: ARROW GRADUATION PLATE (For Maidens, 1 & 2 Time Winners)

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Line Horse
Bjorn Ironside
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
5 / 8
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    Bjorn Ironside       2    57.0    1    0.00     6.5   108   108          108   +0
2    Pennsylvania         3    60.0    2    0.50     9.5   92    108          108   +16
3    Poblano              3    54.0    3    4.00     9.5   101   96           96    -5
4    Mystical Miss        2    52.5    4    5.00     6.5   96    99           99    +3
5    Antonio Gaudi        2    56.5    5    7.75     6.5   77    107          107   +30
6    Bakwena              3    54.0    6    8.00     9.5   95    96           96    +1
7    Red Legend           2    54.5    7    16.00    6.5   81    103          103   +22
99   Hemisphere           3    60.0    99   0.00     9.5   -     108          108   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bjorn Ironside Line 108 105 108 -3 6.5
2 Pennsylvania 92 94 108 -14 9.5 -
3 Poblano 101 100 96 +4 9.5 -
4 Mystical Miss 96 83 99 -16 6.5 -
5 Antonio Gaudi 77 82 107 -25 6.5 -
6 Bakwena 95 97 96 +1 9.5 -
7 Red Legend 81 81 103 -22 6.5 -
99 Hemisphere - 83 108 -25 9.5 -
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