Official NHA Assessment

Race 4: www.tabgold.co.za GRADUATION PLATE (F & M) (Maidens,1 & 2 time winners f & m)

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Line Horse
Lucky Miss
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
2 / 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    Ice Sunsation        6    57.5    1    0.00     0.0   72    82           70    -2
2    Lucky Miss           3    60.0    2    1.70     5.0   80    80           80    +0
3    Sleek As Silk        2    56.0    3    5.10     0.0   70    79           79    +9
4    Bell Starbuster      4    53.0    4    6.90     2.5   52    68           68    +16
5    Acacia's Blossom     2    59.0    5    8.30     0.0   87    85           85    -2
6    Devils And Dust      2    56.0    6    10.00    0.0   75    79           79    +4
7    Imbewu               3    57.0    7    15.30    5.0   79    71           71    -8
99   Port Adelaide (AUS)  4    54.5    99   0.00     2.5   -     71           71    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ice Sunsation 72 90 70 +20 0.0 -
2 Lucky Miss Line 80 82 80 +2 5.0
3 Sleek As Silk 70 87 79 +8 0.0 -
4 Bell Starbuster 52 52 68 -16 2.5 -
5 Acacia's Blossom 87 66 85 -19 0.0 -
6 Devils And Dust 75 52 79 -27 0.0 -
7 Imbewu 79 72 71 +1 5.0 -
99 Port Adelaide (AUS) - 54 71 -17 2.5 -
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