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
American Dazzler
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
2 / 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    Pembroke             3    60.0    1    0.00     8.5   69    42           42    -27
2    Shervil Glow         2    57.0    2    4.25     0.0   -     54           54    +54
3    Master Ariano        3    57.0    3    4.75     8.5   -     36           36    +36
4    American Dazzler     2    60.0    4    5.25     0.0   59    59           59    +0
5    Afrodite             3    57.0    5    5.50     8.5   59    36           49    -10
6    Opening Ceremony     3    60.0    6    5.75     8.5   55    42           45    -10
7    Flaming Drum         3    60.0    7    7.75     8.5   65    42           55    -10
8    Follow The Band      2    57.0    8    8.25     0.0   68    53           58    -10
9    Piper Of Hamelin     2    57.0    9    11.00    0.0   -     53           53    +53
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Pembroke 69 79 42 +37 8.5 -
2 Shervil Glow - 71 54 +17 0.0 -
3 Master Ariano - 84 36 +48 8.5 -
4 American Dazzler Line 59 59 59 ✓ Match 0.0
5 Afrodite 59 56 49 +7 8.5 -
6 Opening Ceremony 55 55 45 +10 8.5 -
7 Flaming Drum 65 50 55 -5 8.5 -
8 Follow The Band 68 53 58 -5 0.0 -
9 Piper Of Hamelin - 55 53 +2 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