Official NHA Assessment

Race 4: WWW.GAUTENGSUMMERCUP.CO.ZA WORK RIDERS MAIDEN PLATE (F & M) (For Maiden Fillies and Mares)

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Line Horse
Voshaarnooi
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
0 / 12
Within 2 points
Significant Diffs
10 / 12
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    Coffeeberry          5    58.5    1    0.00     0.0   66    59           59    -7
2    Aunt Pittypat        3    58.0    2    2.00     8.0   -     45           45    +45
3    Queen Britanna       2    58.0    3    2.25     0.0   57    61           61    +4
4    Voshaarnooi          2    58.0    4    4.00     0.0   59    59           59    +0
5    Batik                3    60.0    5    4.25     8.0   57    47           47    -10
6    Silk Garden          3    60.0    6    6.25     8.0   57    46           47    -10
7    Hayley's Promise     3    58.0    7    6.35     8.0   62    42           52    -10
8    Island Beauty        3    60.0    8    6.50     8.0   60    46           50    -10
9    Sassy                2    58.0    9    6.75     0.0   69    58           59    -10
10   Mrs Shelby           2    58.0    10   6.85     0.0   58    58           58    +0
11   Spring Of Elixir     3    58.0    11   12.25    8.0   -     42           42    +42
99   Broadlands           3    58.0    99   0.00     8.0   -     42           42    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Coffeeberry 66 72 59 +13 0.0 -
2 Aunt Pittypat - 65 45 +20 8.0 -
3 Queen Britanna 57 57 61 -4 0.0 -
4 Voshaarnooi Line 59 50 59 -9 0.0
5 Batik 57 57 47 +10 8.0 -
6 Silk Garden 57 56 47 +9 8.0 -
7 Hayley's Promise 62 58 52 +6 8.0 -
8 Island Beauty 60 63 50 +13 8.0 -
9 Sassy 69 55 59 -4 0.0 -
10 Mrs Shelby 58 50 58 -8 0.0 -
11 Spring Of Elixir - 55 42 +13 8.0 -
99 Broadlands - 69 42 +27 8.0 -
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