Official NHA Assessment

Race 3: www.tabgold.co.za CLASSIFIED STAKES (For horses with nett rating of 71 and below)

Back to Race
Line Horse
Rock Fall
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
4 / 9
Within 2 points
Significant Diffs
5 / 9
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Johnny's Hope        2    58.5    1    0.00     0.0   75    73           73    -2
2    Rock Fall            2    58.5    2    0.60     0.0   79    79           79    +0
3    Rise                 5    58.0    3    0.80     0.0   72    77           77    +5
4    Luck Of The Iris     4    50.0    4    2.10     1.5   50    57           57    +7
5    Zapotec              3    50.0    5    9.60     4.5   60    47           50    -10
99   Rosslyne             2    52.0    99   0.00     0.0   -     60           60    +0
99   Tommy The Kidd       4    53.0    99   0.00     1.5   -     59           59    +0
99   Lucretius            6    58.5    99   0.00     0.0   -     73           73    +0
99   Leopard Lady         4    52.0    99   0.00     1.5   -     57           57    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Johnny's Hope 75 79 73 +6 0.0 -
2 Rock Fall Line 79 80 79 +1 0.0
3 Rise 72 69 77 -8 0.0 -
4 Luck Of The Iris 50 47 57 -10 1.5 -
5 Zapotec 60 51 50 +1 4.5 -
99 Rosslyne - 58 60 -2 0.0 -
99 Tommy The Kidd - 53 59 -6 1.5 -
99 Lucretius - 64 73 -9 0.0 -
99 Leopard Lady - 55 57 -2 1.5 -
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