Official NHA Assessment

Race 7: MICHAEL ROBERTS STAKES (For All Horses. Non-Black Type)

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Line Horse
Selukwe
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
6 / 10
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    Imilenzeyokududuma   6    61.0    1    0.00     0.0   109   119          115   +6
2    Narina Trogon        5    59.5    2    0.80     0.0   106   120          120   +14
3    Royal Victory        5    62.5    3    1.30     0.0   125   125          125   +0
4    Celtic Beauty        4    55.5    4    1.80     3.0   103   105          105   +2
5    Selukwe              3    55.0    5    2.40     6.0   97    97           97    +0
6    Kitchakal            5    52.0    6    3.10     0.0   89    103          103   +14
7    Navajo Nation        4    58.0    7    4.80     3.0   103   107          107   +4
8    Mary's Greenlight    4    55.5    8    5.90     3.0   103   102          102   -1
9    Miss Platina         4    52.5    9    6.10     3.0   98    96           96    -2
10   Mexican Pete         3    55.0    10   11.40    6.0   96    95           95    -1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Imilenzeyokududuma 109 109 115 -6 0.0 -
2 Narina Trogon 106 102 120 -18 0.0 -
3 Royal Victory 125 124 125 -1 0.0 -
4 Celtic Beauty 103 96 105 -9 3.0 -
5 Selukwe Line 97 115 97 +18 6.0
6 Kitchakal 89 86 103 -17 0.0 -
7 Navajo Nation 103 104 107 -3 3.0 -
8 Mary's Greenlight 103 103 102 +1 3.0 -
9 Miss Platina 98 92 96 -4 3.0 -
10 Mexican Pete 96 84 95 -11 6.0 -
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