Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY MAIDEN PLATE (F & M) (For Maiden F & M. R15 000 Win bonus ROA Members)

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Line Horse
Bella Attrice
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
2 / 10
Within 2 points
Significant Diffs
7 / 10
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    Cold Truth           5    60.0    1    0.00     0.0   -     80           6     +6
2    Piton De Neige       4    59.0    2    2.00     10.0  62    58           58    -4
3    Bella Attrice        2    59.0    3    2.05     5.5   67    67           67    +0
4    Happy Vibes          3    60.0    4    3.80     8.5   64    63           63    -1
5    Heartlight           2    60.0    5    4.05     5.5   58    69           69    +11
6    Grace Upon Grace     2    59.0    6    5.05     5.5   -     67           67    +67
7    Tune Again           6    60.0    7    5.55     0.0   30    80           80    +50
8    Lava Fields          3    59.0    8    5.80     8.5   -     61           61    +61
9    Painted Beauty       4    60.0    9    17.05    10.0  30    60           60    +30
10   Elusive Hunter       4    59.0    10   24.05    10.0  -     58           58    +58
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Cold Truth - 61 6 +55 0.0 -
2 Piton De Neige 62 57 58 -1 10.0 -
3 Bella Attrice Line 67 66 67 -1 5.5
4 Happy Vibes 64 59 63 -4 8.5 -
5 Heartlight 58 48 69 -21 5.5 -
6 Grace Upon Grace - 60 67 -7 5.5 -
7 Tune Again 30 50 80 -30 0.0 -
8 Lava Fields - 42 61 -19 8.5 -
9 Painted Beauty 30 30 60 -30 10.0 -
10 Elusive Hunter - 50 58 -8 10.0 -
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