Official NHA Assessment

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

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Line Horse
Grey Smoke
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
4 / 8
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    Legal Thriller       4    59.0    1    0.00     10.0  63    67           67    +4
2    Grey Smoke           2    59.0    2    1.50     5.5   76    76           76    +0
3    Swiss Walt           4    59.0    3    2.75     10.0  75    67           67    -8
4    Final Edition        5    60.0    4    4.25     0.0   67    89           89    +22
5    Fujisan              4    59.0    5    5.50     10.0  60    67           67    +7
6    This Time Round      2    60.0    6    6.75     5.5   54    78           78    +24
7    He's A Gaul          3    55.0    7    12.25    8.5   -     62           62    +62
99   Ubisika              2    59.0    99   0.00     5.5   -     76           76    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Legal Thriller 63 70 67 +3 10.0 -
2 Grey Smoke Line 76 77 76 +1 5.5
3 Swiss Walt 75 74 67 +7 10.0 -
4 Final Edition 67 78 89 -11 0.0 -
5 Fujisan 60 60 67 -7 10.0 -
6 This Time Round 54 54 78 -24 5.5 -
7 He's A Gaul - 63 62 +1 8.5 -
99 Ubisika - 80 76 +4 5.5 -
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