Official NHA Assessment

Race 4: www.tabgold.co.za MAIDEN PLATE (F & M) (For Maiden Fillies & Mares)

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Line Horse
American Style
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
2 / 7
Within 2 points
Significant Diffs
4 / 7
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    Ventriloquist        4    58.5    1    0.00     1.5   48    60           54    +6
2    American Style       3    60.0    2    0.25     3.5   59    59           59    +0
3    Sexy Shiraz          3    60.0    3    5.65     3.5   58    59           59    +1
4    Deltron Energy       3    60.0    4    7.35     3.5   48    59           59    +11
5    Top Ten              4    56.0    5    7.40     1.5   50    55           55    +5
6    View The Roses       3    60.0    6    10.80    3.5   49    59           59    +10
99   Let The Sun Shine    3    60.0    99   0.00     3.5   -     59           59    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ventriloquist 48 46 54 -8 1.5 -
2 American Style Line 59 60 59 +1 3.5
3 Sexy Shiraz 58 57 59 -2 3.5 -
4 Deltron Energy 48 48 59 -11 3.5 -
5 Top Ten 50 50 55 -5 1.5 -
6 View The Roses 49 50 59 -9 3.5 -
99 Let The Sun Shine - 48 59 -11 3.5 -
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