Official NHA Assessment

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

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Line Horse
Swiftwinged
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
0 / 10
Within 2 points
Significant Diffs
7 / 10
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    Amazing Colours      4    60.0    1    0.00     4.5   74    70           70    -4
2    Burn Baby Burn       2    55.0    2    0.25     0.0   64    69           69    +5
3    Swiftwinged          2    52.0    3    2.00     0.0   66    66           66    +0
4    Hat's Miracle        2    52.0    4    7.50     0.0   57    63           63    +6
5    Royal Venus          2    57.0    5    9.00     0.0   55    73           73    +18
6    Lava Fields          3    59.5    6    12.25    7.0   -     64           64    +64
7    Burnt Sugar          2    52.0    7    13.50    0.0   46    63           63    +17
8    Sunset Roar          2    53.5    8    24.00    0.0   60    66           66    +6
9    Lady Zundra          3    59.5    9    44.00    7.0   -     64           64    +64
99   Magic Measure        2    59.5    99   0.00     0.0   -     78           78    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Amazing Colours 74 59 70 -11 4.5 -
2 Burn Baby Burn 64 65 69 -4 0.0 -
3 Swiftwinged Line 66 62 66 -4 0.0
4 Hat's Miracle 57 59 63 -4 0.0 -
5 Royal Venus 55 50 73 -23 0.0 -
6 Lava Fields - 42 64 -22 7.0 -
7 Burnt Sugar 46 44 63 -19 0.0 -
8 Sunset Roar 60 57 66 -9 0.0 -
9 Lady Zundra - 10 64 -54 7.0 -
99 Magic Measure - 28 78 -50 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