Official NHA Assessment

Race 7: MIKE DE KOCK IPI TOMBE CHALLENGE (Grade 2) (For Fillies and Mares at Weight For Age + Penalties)

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Line Horse
Marigold Hotel
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
5 / 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    Gimme A Nother       3    53.0    1    0.00     6.0   100   92           92    -8
2    Feather Boa          2    60.0    2    4.75     0.0   114   118          118   +4
3    Marigold Hotel       3    59.0    3    6.00     6.0   104   104          104   +0
4    My Soul Mate         4    53.0    4    6.75     3.0   98    98           98    +0
5    Emirate Gina         2    59.0    5    7.25     0.0   105   116          116   +11
6    Humdinger            3    60.0    6    9.25     6.0   119   106          109   -10
7    Winter Greeting      5    59.0    7    10.00    0.0   105   116          116   +11
8    Silver Hills         3    59.0    8    16.00    6.0   100   104          104   +4
99   Bavarian Beauty      2    55.0    99   0.00     0.0   -     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 Gimme A Nother 100 125 92 +33 6.0 -
2 Feather Boa 114 114 118 -4 0.0 -
3 Marigold Hotel Line 104 107 104 +3 6.0
4 My Soul Mate 98 107 98 +9 3.0 -
5 Emirate Gina 105 103 116 -13 0.0 -
6 Humdinger 119 119 109 +10 6.0 -
7 Winter Greeting 105 104 116 -12 0.0 -
8 Silver Hills 100 108 104 +4 6.0 -
99 Bavarian Beauty - 109 108 +1 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