Official NHA Assessment

Race 7: BET WITH COLOSSUS POOLS EXCLUSIVE ON www.tote.co.za B STAKES (For All Horses)

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Line Horse
Donquerari
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
5 / 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    Circumbendibus       3    59.0    1    0.00     3.0   97    87           87    -10
2    Kalahari Roller      3    51.5    2    2.80     3.0   86    72           76    -10
3    Donquerari           5    55.5    3    3.40     0.0   86    86           86    +0
4    Siesta Sunset        2    54.5    4    3.70     2.0   91    80           81    -10
5    First Origin         2    58.5    5    4.40     2.0   91    88           88    -3
6    Connery              4    61.5    6    4.55     3.5   97    91           91    -6
7    Captain's Christy    4    57.5    7    6.55     3.5   95    83           85    -10
99   Vision To Achieve    4    53.0    99   0.00     3.5   -     74           74    +0
99   Position Of Power    3    58.5    99   0.00     3.0   -     86           86    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Circumbendibus 97 103 87 +16 3.0 -
2 Kalahari Roller 86 86 76 +10 3.0 -
3 Donquerari Line 86 86 86 ✓ Match 0.0
4 Siesta Sunset 91 89 81 +8 2.0 -
5 First Origin 91 89 88 +1 2.0 -
6 Connery 97 96 91 +5 3.5 -
7 Captain's Christy 95 94 85 +9 3.5 -
99 Vision To Achieve - 87 74 +13 3.5 -
99 Position Of Power - 90 86 +4 3.0 -
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