Official NHA Assessment

Race 3: JOHAN VAN DER LINDEN, NICK BLIGNAUT, JACOBUS VILJOEN MR 80 HANDICAP (Open)

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Line Horse
Alabama Anna
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 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    Droghiere            3    56.0    1    0.00     3.0   76    70           76    +0
2    Alabama Anna         6    58.5    2    0.90     0.0   81    81           81    +0
3    Gin And Tonic        3    53.0    3    2.50     3.0   73    64           64    -9
4    Irfaans Boy          3    63.0    4    5.00     3.0   90    84           84    -6
5    Insatiable           3    55.5    5    5.50     3.0   75    69           69    -6
6    Alex The Great       7    54.0    6    6.60     0.0   68    72           72    +4
7    Ice Eater            6    56.0    7    15.25    0.0   72    76           76    +4
99   Snow Symphony        4    52.0    99   0.00     3.5   -     61           61    +0
99   Imposing Angel       3    55.5    99   0.00     3.0   -     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 Droghiere 76 75 76 -1 3.0 -
2 Alabama Anna Line 81 73 81 -8 0.0
3 Gin And Tonic 73 68 64 +4 3.0 -
4 Irfaans Boy 90 90 84 +6 3.0 -
5 Insatiable 75 62 69 -7 3.0 -
6 Alex The Great 68 63 72 -9 0.0 -
7 Ice Eater 72 57 76 -19 0.0 -
99 Snow Symphony - 50 61 -11 3.5 -
99 Imposing Angel - 73 69 +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