Official NHA Assessment

Race 5: KHAYA STABLES DIADEM STAKES (Grade 2) (Weight For Age plus Penalties)

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Line Horse
Bereave
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
5 / 8
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    Cosmic Highway       3    55.0    1    0.00     4.5   108   101          101   -7
2    Trip Of Fortune      3    55.0    2    1.25     4.5   106   101          101   -5
3    Rio Querari          5    60.0    3    1.45     0.0   130   120          120   -10
4    Bereave              4    58.0    4    1.95     5.0   106   106          106   +0
5    Seeking The Stars    7    59.0    5    2.25     0.0   124   118          118   -6
6    Ambiorix             3    57.0    6    5.50     4.5   110   105          105   -5
7    Irish Morning        5    58.0    7    8.00     0.0   102   116          116   +14
8    Pleasedtomeetyou     6    58.0    8    14.75    0.0   105   116          116   +11
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Cosmic Highway 108 115 101 +14 4.5 -
2 Trip Of Fortune 106 127 101 +26 4.5 -
3 Rio Querari 130 116 120 -4 0.0 -
4 Bereave Line 106 111 106 +5 5.0
5 Seeking The Stars 124 116 118 -2 0.0 -
6 Ambiorix 110 98 105 -7 4.5 -
7 Irish Morning 102 100 116 -16 0.0 -
8 Pleasedtomeetyou 105 110 116 -6 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