Official NHA Assessment

Race 6: MICHAEL ROBERTS STAKES (For All Horses - Non-Black Type)

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Line Horse
Queue Wing
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
3 / 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    Bella Siccome        3    51.0    1    0.00     6.0   88    70           70    -18
2    Cape Eagle           7    60.0    2    1.00     0.0   103   104          104   +1
3    Formagear            5    59.5    3    1.10     0.0   103   103          103   +0
4    Queue Wing           7    56.0    4    1.80     0.0   95    95           95    +0
5    Addabar              3    57.0    5    2.40     6.0   98    84           88    -10
6    Down To Business     2    58.0    6    2.80     0.0   100   98           98    -2
7    News Stream          6    53.5    7    4.90     0.0   88    87           87    -1
8    Capetown Beauty      3    51.5    8    7.60     6.0   91    71           81    -10
9    Rockie Reef          3    57.0    9    9.20     6.0   102   82           92    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bella Siccome 88 93 70 +23 6.0 -
2 Cape Eagle 103 106 104 +2 0.0 -
3 Formagear 103 108 103 +5 0.0 -
4 Queue Wing Line 95 81 95 -14 0.0
5 Addabar 98 97 88 +9 6.0 -
6 Down To Business 100 100 98 +2 0.0 -
7 News Stream 88 83 87 -4 0.0 -
8 Capetown Beauty 91 76 81 -5 6.0 -
9 Rockie Reef 102 97 92 +5 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