Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY MAIDEN PLATE (For all Maidens)

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Line Horse
World Of Diamonds
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
8 / 11
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    Imokelly             3    60.0    1    0.00     8.5   65    59           59    -6
2    Elusive Black        3    60.0    2    1.75     8.5   -     59           59    +59
3    Endizayo             3    57.5    3    4.50     8.5   60    54           54    -6
4    Star Trooper         3    60.0    4    4.60     8.5   52    59           59    +7
5    World Of Diamonds    2    56.5    5    5.60     5.5   58    58           58    +0
6    Bomber Stream        4    57.5    6    5.70     10.0  62    51           52    -10
6    Sombreuil            2    56.5    6    5.70     5.5   72    58           62    -10
8    Global Chief         3    60.0    8    6.70     8.5   55    59           59    +4
9    Shooting Arrow       3    57.5    9    10.45    8.5   -     54           54    +54
10   Holly's Kiss         3    56.5    10   12.70    8.5   -     52           52    +52
99   In Process           3    56.5    99   0.00     8.5   -     52           52    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Imokelly 65 68 59 +9 8.5 -
2 Elusive Black - 68 59 +9 8.5 -
3 Endizayo 60 56 54 +2 8.5 -
4 Star Trooper 52 51 59 -8 8.5 -
5 World Of Diamonds Line 58 59 58 +1 5.5
6 Bomber Stream 62 52 52 ✓ Match 10.0 -
6 Sombreuil 72 70 62 +8 5.5 -
8 Global Chief 55 51 59 -8 8.5 -
9 Shooting Arrow - 36 54 -18 8.5 -
10 Holly's Kiss - - 52 -52 8.5 -
99 In Process - - 52 -52 8.5 -
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