Official NHA Assessment

Race 1: www.tabgold.co.za MAIDEN PLATE (For all Maidens)

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Line Horse
Ndaka
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
8 / 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    Armed Force          2    57.0    1    0.00     1.0   -     67           6     +6
2    Cannatonic           3    60.0    2    0.10     2.0   -     71           71    +71
3    Granddaddy Purple    3    60.0    3    1.15     2.0   52    71           71    +19
4    Seattlegreenlight    2    57.0    4    1.40     1.0   -     67           67    +67
5    Ygritte              2    54.5    5    1.45     1.0   -     62           62    +62
6    Ndaka                3    56.0    6    2.35     2.0   63    63           63    +0
7    Olverston            2    57.0    7    3.10     1.0   -     67           67    +67
8    Wulfston             2    57.0    8    4.50     1.0   -     67           67    +67
9    Global Path          3    58.5    9    6.40     2.0   62    68           68    +6
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Armed Force - 80 6 +74 1.0 -
2 Cannatonic - 48 71 -23 2.0 -
3 Granddaddy Purple 52 50 71 -21 2.0 -
4 Seattlegreenlight - 60 67 -7 1.0 -
5 Ygritte - 69 62 +7 1.0 -
6 Ndaka Line 63 61 63 -2 2.0
7 Olverston - 45 67 -22 1.0 -
8 Wulfston - 75 67 +8 1.0 -
9 Global Path 62 59 68 -9 2.0 -
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