Official NHA Assessment

Race 8: WORLD SPORTS BETTING SA DERBY (Grade 1) (3 year olds (3rd Leg SA Triple Crown))

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Line Horse
Aragosta
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
6 / 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    Aragosta             3    60.0    1    0.00     5.5   109   109          109   +0
2    Zeus                 3    60.0    2    0.50     5.5   99    115          115   +16
3    London Roads         3    60.0    3    6.00     5.5   80    109          109   +29
4    Litigation           3    60.0    4    6.50     5.5   97    109          109   +12
5    Platinum Sky         3    60.0    5    10.00    5.5   104   109          109   +5
6    Red Saxon            3    60.0    6    10.25    5.5   118   109          109   -9
7    With Pleasure        3    60.0    7    12.50    5.5   79    109          109   +30
8    Ablueazure           3    60.0    8    13.00    5.5   77    109          109   +32
9    Tabebuia             3    60.0    9    14.00    5.5   81    109          109   +28
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Aragosta Line 109 109 109 ✓ Match 5.5
2 Zeus 99 117 115 +2 5.5 -
3 London Roads 80 78 109 -31 5.5 -
4 Litigation 97 113 109 +4 5.5 -
5 Platinum Sky 104 99 109 -10 5.5 -
6 Red Saxon 118 116 109 +7 5.5 -
7 With Pleasure 79 97 109 -12 5.5 -
8 Ablueazure 77 76 109 -33 5.5 -
9 Tabebuia 81 94 109 -15 5.5 -
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