Official NHA Assessment

Race 8: www.tabgold.co.za D STAKES (For All Horses with a nett rating of 69 & below)

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Line Horse
Griffin Park
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
6 / 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    Arverni Princess     2    56.5    1    0.00     2.0   58    64           64    +6
2    Purple Powahouse     8    58.5    2    1.10     0.0   57    72           72    +15
3    Griffin Park         4    60.0    3    1.60     3.5   68    68           68    +0
4    Victor Rail          5    58.5    4    2.70     0.0   58    72           72    +14
5    Whereverilaymyhat    4    60.0    5    2.75     3.5   59    68           68    +9
6    Daring Act           4    58.5    6    3.05     3.5   57    65           65    +8
7    Cappellino           3    60.0    7    4.65     3.0   60    69           69    +9
8    Lightning Jimmy      4    58.5    8    6.55     3.5   56    65           65    +9
9    Brave Voyager        3    60.0    9    9.05     3.0   59    69           69    +10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Arverni Princess 58 67 64 +3 2.0 -
2 Purple Powahouse 57 55 72 -17 0.0 -
3 Griffin Park Line 68 58 68 -10 3.5
4 Victor Rail 58 61 72 -11 0.0 -
5 Whereverilaymyhat 59 68 68 ✓ Match 3.5 -
6 Daring Act 57 60 65 -5 3.5 -
7 Cappellino 60 61 69 -8 3.0 -
8 Lightning Jimmy 56 48 65 -17 3.5 -
9 Brave Voyager 59 51 69 -18 3.0 -
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