Official NHA Assessment

Race 9: KHAYA STABLES DIADEM STAKES (Grade 2) (Weight For Age plus Penalties)

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Line Horse
Trip Of Fortune
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
1 / 13
Within 2 points
Significant Diffs
11 / 13
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    Bereave              4    58.0    1    0.00     5.0   107   116          113   +6
2    Gimme A Prince       3    60.0    2    1.00     4.5   123   121          121   -2
3    Trip Of Fortune      3    59.0    3    1.40     4.5   119   119          119   +0
4    Rio Querari          5    58.0    4    1.70     0.0   122   126          126   +4
5    Countdown            2    55.0    5    3.95     3.0   102   114          114   +12
6    Mr Cobbs             5    58.0    6    4.15     0.0   104   126          126   +22
7    We're Jamming        5    55.0    7    4.20     0.0   109   120          120   +11
8    Silver Operator      5    59.0    8    4.95     0.0   119   128          128   +9
9    Cartel Captain       5    58.0    9    5.45     0.0   110   126          126   +16
10   FireAlley            7    58.0    10   5.85     0.0   110   126          126   +16
11   Gladatorian          5    55.0    11   10.10    0.0   105   120          120   +15
12   Cosmic Highway       3    59.0    12   10.60    4.5   116   119          119   +3
99   Battle Force         4    58.0    99   0.00     5.0   -     116          116   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Bereave 107 111 113 -2 5.0 -
2 Gimme A Prince 123 134 121 +13 4.5 -
3 Trip Of Fortune Line 119 127 119 +8 4.5
4 Rio Querari 122 116 126 -10 0.0 -
5 Countdown 102 106 114 -8 3.0 -
6 Mr Cobbs 104 106 126 -20 0.0 -
7 We're Jamming 109 108 120 -12 0.0 -
8 Silver Operator 119 115 128 -13 0.0 -
9 Cartel Captain 110 88 126 -38 0.0 -
10 FireAlley 110 107 126 -19 0.0 -
11 Gladatorian 105 127 120 +7 0.0 -
12 Cosmic Highway 116 115 119 -4 4.5 -
99 Battle Force - 109 116 -7 5.0 -
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