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
Texas Red
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
8 / 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    Tin Pan Alley        2    57.0    1    0.00     0.0   117   112          112   -5
2    See It Again         2    60.0    2    3.75     0.0   130   119          120   -10
3    Texas Red            5    60.0    3    3.85     0.0   119   119          119   +0
4    Fire Attack          3    60.0    4    4.45     3.0   124   112          114   -10
5    Main Defender        4    60.0    5    5.25     1.5   130   115          120   -10
6    Cosmic Speed         3    60.0    6    6.75     3.0   124   112          114   -10
7    Atticus Finch        5    60.0    7    8.75     0.0   127   118          118   -9
8    The Real Prince      3    60.0    8    10.75    3.0   128   112          118   -10
9    Pressonregardless    4    60.0    9    11.35    1.5   109   115          115   +6
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Tin Pan Alley 117 128 112 +16 0.0 -
2 See It Again 130 130 120 +10 0.0 -
3 Texas Red Line 119 119 119 ✓ Match 0.0
4 Fire Attack 124 124 114 +10 3.0 -
5 Main Defender 130 130 120 +10 1.5 -
6 Cosmic Speed 124 122 114 +8 3.0 -
7 Atticus Finch 127 127 118 +9 0.0 -
8 The Real Prince 128 128 118 +10 3.0 -
9 Pressonregardless 109 109 115 -6 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