Official NHA Assessment

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

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Line Horse
Sombreuil
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
1 / 8
Within 2 points
Significant Diffs
6 / 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    Jet Querari          3    60.0    1    0.00     7.5   68    72           72    +4
2    Timeline             3    57.5    2    0.50     7.5   64    67           67    +3
3    Sombreuil            2    56.5    3    1.00     5.0   70    70           70    +0
4    Alesian Beau         3    60.0    4    4.75     7.5   68    72           72    +4
5    Buddleja             2    56.5    5    4.85     5.0   69    70           70    +1
6    Epic Thunder         3    60.0    6    8.85     7.5   44    72           72    +28
7    Star Trooper         3    60.0    7    10.60    7.5   58    72           72    +14
8    Devoted              3    59.0    8    11.60    7.5   -     70           70    +70
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Jet Querari 68 68 72 -4 7.5 -
2 Timeline 64 53 67 -14 7.5 -
3 Sombreuil Line 70 70 70 ✓ Match 5.0
4 Alesian Beau 68 66 72 -6 7.5 -
5 Buddleja 69 59 70 -11 5.0 -
6 Epic Thunder 44 49 72 -23 7.5 -
7 Star Trooper 58 51 72 -21 7.5 -
8 Devoted - 50 70 -20 7.5 -
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