Official NHA Assessment

Race 8: JOIN THE SOCIAL SQUAD www.socialsquad.co.za CLASS 4 (F & M) (For Fillies & Mares. Benchmark at 60.0kg = 80)

Back to Race
Line Horse
Pentolina
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
3 / 9
Within 2 points
Significant Diffs
4 / 9
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Hunga Tonga          3    58.0    1    0.00     8.5   77    72           72    -5
2    Pentolina            3    59.0    2    0.50     8.5   79    79           79    +0
3    Lavender Bay         4    60.5    3    0.55     6.0   81    87           87    +6
4    Lady Look Alike      4    57.0    4    1.80     6.0   74    78           78    +4
5    Oncidium             2    54.5    5    3.55     0.0   86    83           83    -3
6    Act Of Grace         2    49.0    6    3.85     0.0   83    72           73    -10
7    Lady Springfield     3    61.5    7    6.60     8.5   84    79           79    -5
99   Hampstead Heath      4    59.5    99   0.00     6.0   -     80           80    +0
99   Zena's Act           2    53.0    99   0.00     0.0   -     79           79    +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Hunga Tonga 77 78 72 +6 8.5 -
2 Pentolina Line 79 80 79 +1 8.5
3 Lavender Bay 81 95 87 +8 6.0 -
4 Lady Look Alike 74 77 78 -1 6.0 -
5 Oncidium 86 76 83 -7 0.0 -
6 Act Of Grace 83 81 73 +8 0.0 -
7 Lady Springfield 84 81 79 +2 8.5 -
99 Hampstead Heath - 75 80 -5 6.0 -
99 Zena's Act - 76 79 -3 0.0 -
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