Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY MAIDEN JUVENILE PLATE (Fillies) (For 2 yof R100 000 Win BSA Bonus Series)

Back to Race
Line Horse
None identified
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
0 / 7
Within 2 points
Significant Diffs
7 / 7
More than 5 points
Detailed Assessment
------------------------------------------------------------------------------------------------------------------------
Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
------------------------------------------------------------------------------------------------------------------------
1    Joy And Peace        4    60.0    1    0.00     3.5   -     -            -     +0
2    Amazing Colours      4    60.0    2    1.25     3.5   -     -            -     +0
3    Jambo Sana           2    60.0    3    2.50     2.0   -     -            -     +0
4    Fire Glow            4    60.0    4    3.75     3.5   -     -            -     +0
5    Winning Grace        2    60.0    5    8.00     2.0   -     -            -     +0
6    First Minister       2    60.0    6    8.50     2.0   -     -            -     +0
7    Butterfly Queen      2    60.0    7    17.75    2.0   -     -            -     +0
------------------------------------------------------------------------------------------------------------------------

Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Joy And Peace - 110 - +110 3.5 -
2 Amazing Colours - 59 - +59 3.5 -
3 Jambo Sana - 74 - +74 2.0 -
4 Fire Glow - 67 - +67 3.5 -
5 Winning Grace - 62 - +62 2.0 -
6 First Minister - 57 - +57 2.0 -
7 Butterfly Queen - 63 - +63 2.0 -
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