Official NHA Assessment

Race 7: HIGHVELD CHAMPION SPRINTER - THUNDERSTRUCK MR 86 HANDICAP (Open)

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Line Horse
Mount Darwin
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
3 / 12
Within 2 points
Significant Diffs
7 / 12
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    The Brief            3    59.0    1    0.00     2.5   84    86           84    +0
2    Mount Darwin         3    58.5    2    3.25     2.5   88    88           88    +0
3    Strewn Sky           2    57.5    3    3.35     0.0   86    91           91    +5
4    Total Surrender      5    59.0    4    4.50     0.0   84    92           92    +8
5    Vesuvio              5    56.5    5    6.50     0.0   79    86           86    +7
6    Dark Silver          4    55.5    6    8.50     1.0   82    82           82    +0
7    Absolute Value       3    60.5    7    10.75    2.5   87    89           89    +2
8    George Handel        4    61.0    8    12.00    1.0   93    93           93    +0
99   Leao Alado           2    53.5    99   0.00     0.0   -     80           80    +0
99   Global Impact        2    60.0    99   0.00     0.0   -     93           93    +0
99   Claw                 4    55.5    99   0.00     1.0   -     82           82    +0
99   Master Ariano        3    57.5    99   0.00     2.5   -     83           83    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 The Brief 84 90 84 +6 2.5 -
2 Mount Darwin Line 88 81 88 -7 2.5
3 Strewn Sky 86 69 91 -22 0.0 -
4 Total Surrender 84 74 92 -18 0.0 -
5 Vesuvio 79 85 86 -1 0.0 -
6 Dark Silver 82 84 82 +2 1.0 -
7 Absolute Value 87 84 89 -5 2.5 -
8 George Handel 93 85 93 -8 1.0 -
99 Leao Alado - 77 80 -3 0.0 -
99 Global Impact - 74 93 -19 0.0 -
99 Claw - 91 82 +9 1.0 -
99 Master Ariano - 84 83 +1 2.5 -
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