Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

Back to Race
Line Horse
Back To Formentera
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 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    Klaserie             3    60.0    1    0.00     10.5  54    60           60    +6
2    Back To Formentera   3    58.5    2    1.25     10.5  57    57           57    +0
3    Spring Fever         2    58.0    3    2.00     7.0   68    63           63    -5
4    Wonder Woman         6    60.0    4    4.50     0.0   46    81           81    +35
5    Chasing Heart        3    60.0    5    4.60     10.5  -     60           60    +60
6    Dream Scape          5    58.0    6    5.35     0.0   -     77           77    +77
7    Mia Calice           2    58.0    7    6.85     7.0   -     63           63    +63
8    Nairobi              3    58.5    8    9.35     10.5  -     57           57    +57
99   Rubycape             4    60.0    99   0.00     12.0  -     57           57    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Klaserie 54 57 60 -3 10.5 -
2 Back To Formentera Line 57 60 57 +3 10.5
3 Spring Fever 68 53 63 -10 7.0 -
4 Wonder Woman 46 43 81 -38 0.0 -
5 Chasing Heart - 44 60 -16 10.5 -
6 Dream Scape - 56 77 -21 0.0 -
7 Mia Calice - 60 63 -3 7.0 -
8 Nairobi - 53 57 -4 10.5 -
99 Rubycape - - 57 -57 12.0 -
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