Official NHA Assessment

Race 5: WISHING YOU A MERRY FESTIVE SEASON CONDITIONS PLATE (For all Horses with at least one win)

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Line Horse
Kaiboy
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 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    Elusive Winter       4    52.0    1    0.00     7.0   98    96           96    -2
2    Tenango              4    59.5    2    2.50     7.0   126   111          116   -10
3    Kaiboy               2    55.5    3    4.50     4.0   109   109          109   +0
4    Lucky Lad            4    61.0    4    4.80     7.0   123   114          114   -9
5    Fire Attack          3    54.0    5    8.05     6.0   126   102          116   -10
99   Un Bel Di            3    52.0    99   0.00     6.0   -     98           98    +0
99   Mexican Pete         3    49.0    99   0.00     6.0   -     92           92    +0
99   Winter Snap          2    51.5    99   0.00     4.0   -     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 Elusive Winter 98 104 96 +8 7.0 -
2 Tenango 126 126 116 +10 7.0 -
3 Kaiboy Line 109 108 109 -1 4.0
4 Lucky Lad 123 118 114 +4 7.0 -
5 Fire Attack 126 124 116 +8 6.0 -
99 Un Bel Di - 99 98 +1 6.0 -
99 Mexican Pete - 84 92 -8 6.0 -
99 Winter Snap - 108 101 +7 4.0 -
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