Official NHA Assessment

Race 8: SA CLASSIC 2 MARCH FOR BOOKINGS CALL 011 681 1796 MIDDLE STAKES (For horses with nett rating of 101 and below)

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Line Horse
Twenty Drachma's
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
6 / 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    Prime Example        2    56.0    1    0.00     0.0   83    98           89    +6
2    Twenty Drachma's     4    54.0    2    2.00     3.0   92    92           92    +0
3    Out Of Your League   5    52.0    3    4.25     0.0   77    92           92    +15
4    Bonete               3    59.5    4    4.75     6.0   96    93           93    -3
5    Rule Book            6    60.0    5    7.50     0.0   90    106          106   +16
6    Battleground         5    56.0    6    8.00     0.0   86    98           98    +12
99   United Council       5    59.5    99   0.00     0.0   -     105          105   +0
99   Indian Ocean         3    51.5    99   0.00     6.0   -     77           77    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Prime Example 83 93 89 +4 0.0 -
2 Twenty Drachma's Line 92 83 92 -9 3.0
3 Out Of Your League 77 77 92 -15 0.0 -
4 Bonete 96 85 93 -8 6.0 -
5 Rule Book 90 92 106 -14 0.0 -
6 Battleground 86 92 98 -6 0.0 -
99 United Council - 100 105 -5 0.0 -
99 Indian Ocean - 107 77 +30 6.0 -
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