Official NHA Assessment

Race 8: WILGERBOSDRIFT H F OPPENHEIMER HORSE CHESTNUT STAKES (Grade 1) (For all Horses at Weight for Age)

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Line Horse
Imilenzeyokududuma
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
4 / 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    Cosmic Speed         3    57.0    1    0.00     3.0   116   100          100   -16
2    Texas Red            5    60.0    2    1.75     0.0   110   115          115   +5
3    Imilenzeyokududuma   6    60.0    3    2.50     0.0   114   114          114   +0
4    Greaterix            3    57.0    4    2.60     3.0   120   102          110   -10
5    Barbaresco           4    60.0    5    3.70     1.5   125   110          115   -10
6    White Pearl          4    57.5    6    4.00     1.5   114   105          105   -9
7    Fire 'N Flames       4    60.0    7    7.00     1.5   101   109          109   +8
8    Lucky Lad            4    60.0    8    9.00     1.5   125   109          115   -10
99   Main Defender        4    60.0    99   0.00     1.5   -     109          109   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Cosmic Speed 116 122 100 +22 3.0 -
2 Texas Red 110 119 115 +4 0.0 -
3 Imilenzeyokududuma Line 114 109 114 -5 0.0
4 Greaterix 120 110 110 ✓ Match 3.0 -
5 Barbaresco 125 116 115 +1 1.5 -
6 White Pearl 114 114 105 +9 1.5 -
7 Fire 'N Flames 101 103 109 -6 1.5 -
8 Lucky Lad 125 118 115 +3 1.5 -
99 Main Defender - 130 109 +21 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