Official NHA Assessment

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

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Line Horse
Opera Verse
Reference for assessment
Exact Matches
0 / 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    Baie Mooi            3    60.0    1    0.00     5.0   -     55           6     +6
2    Ruby Claire          3    60.0    2    8.75     5.0   67    55           57    -10
3    Miss Prior           3    60.0    3    9.50     5.0   73    55           63    -10
4    Opera Verse          4    60.0    4    11.25    6.0   53    53           53    +0
5    Flying Solo          3    60.0    5    12.00    5.0   66    55           56    -10
6    Like A Butterfly     3    60.0    6    12.10    5.0   64    55           55    -9
7    Trillion Dreams      5    60.0    7    17.35    0.0   -     65           65    +65
8    Natural Wonder       3    56.0    8    25.35    5.0   55    47           47    -8
99   Alado's Habit        3    60.0    99   0.00     5.0   -     55           55    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Baie Mooi - 98 6 +92 5.0 -
2 Ruby Claire 67 52 57 -5 5.0 -
3 Miss Prior 73 61 63 -2 5.0 -
4 Opera Verse Line 53 50 53 -3 6.0
5 Flying Solo 66 66 56 +10 5.0 -
6 Like A Butterfly 64 54 55 -1 5.0 -
7 Trillion Dreams - 45 65 -20 0.0 -
8 Natural Wonder 55 55 47 +8 5.0 -
99 Alado's Habit - 68 55 +13 5.0 -
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