Official NHA Assessment

Race 6: WILGERBOSDRIFT HF OPPENHEIMER HORSE CHESTNUT STAKES (Grade 1) (Weight for Age)

Back to Race
Line Horse
Mk's Pride
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
1 / 12
Within 2 points
Significant Diffs
10 / 12
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Mk's Pride           4    60.0    1    0.00     1.0   122   122          122   +0
2    Puerto Manzano (ARG  4    60.0    2    0.75     1.0   111   126          126   +15
3    Kommetdieding        4    60.0    3    3.00     1.0   129   124          124   -5
4    Astrix               5    60.0    4    5.00     0.0   112   124          124   +12
5    Flying Carpet        4    60.0    5    5.25     1.0   116   122          122   +6
6    Al Muthana (AUS)     4    60.0    6    5.35     1.0   122   122          122   +0
7    Bingwa               7    60.0    7    6.00     0.0   118   124          124   +6
8    Donald McDonald      5    60.0    8    7.25     0.0   102   124          124   +22
9    Chimichuri Run       6    60.0    9    7.75     0.0   115   124          124   +9
10   Captain Lannister    3    57.5    10   8.00     2.5   115   114          114   -1
11   Pyromaniac           6    57.5    11   25.00    0.0   113   119          119   +6
12   Warrior's Rest       7    60.0    12   99.99    0.0   112   124          124   +12
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Mk's Pride Line 122 116 122 -6 1.0
2 Puerto Manzano (ARG) 111 119 126 -7 1.0 -
3 Kommetdieding 129 129 124 +5 1.0 -
4 Astrix 112 118 124 -6 0.0 -
5 Flying Carpet 116 116 122 -6 1.0 -
6 Al Muthana (AUS) 122 114 122 -8 1.0 -
7 Bingwa 118 107 124 -17 0.0 -
8 Donald McDonald 102 107 124 -17 0.0 -
9 Chimichuri Run 115 115 124 -9 0.0 -
10 Captain Lannister 115 115 114 +1 2.5 -
11 Pyromaniac 113 71 119 -48 0.0 -
12 Warrior's Rest 112 101 124 -23 0.0 -
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