Official NHA Assessment

Race 7: FOR HOSPITALITY BOOKINGS CALL 011 681 1796 MR 78 HANDICAP (Open)

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Line Horse
After Hours
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
7 / 10
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    Laughing William     5    57.0    1    0.00     0.0   72    69           72    +0
2    After Hours          7    53.0    2    2.20     0.0   64    64           64    +0
3    Last Ginger          4    56.0    3    3.00     2.5   70    64           64    -6
4    Diwali Rocket        3    61.5    4    4.25     5.0   91    69           81    -10
5    Corrupt              2    58.0    5    4.35     0.0   84    71           74    -10
6    Primal Quest         3    56.5    6    6.75     5.0   81    58           71    -10
7    Trident King         3    60.5    7    15.25    5.0   79    66           69    -10
99   Solar Sail           3    57.0    99   0.00     5.0   -     59           59    +0
99   Super Awesome        4    59.0    99   0.00     2.5   -     68           68    +0
99   Spirited Girl        4    59.5    99   0.00     2.5   -     69           69    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Laughing William 72 75 72 +3 0.0 -
2 After Hours Line 64 79 64 +15 0.0
3 Last Ginger 70 64 64 ✓ Match 2.5 -
4 Diwali Rocket 91 89 81 +8 5.0 -
5 Corrupt 84 82 74 +8 0.0 -
6 Primal Quest 81 81 71 +10 5.0 -
7 Trident King 79 65 69 -4 5.0 -
99 Solar Sail - 109 59 +50 5.0 -
99 Super Awesome - 79 68 +11 2.5 -
99 Spirited Girl - 61 69 -8 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