Official NHA Assessment

Race 2: BETONTAB.CO.ZA MAIDEN PLATE (For all Maidens)

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Line Horse
Duke Of Orange
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 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    Duke Of Orange       3    60.0    1    0.00     2.0   66    66           66    +0
2    Global Mark          3    60.0    2    5.00     2.0   60    66           66    +6
3    Mr Linebreaker       3    58.5    3    5.50     2.0   58    63           63    +5
4    Power Surge          3    60.0    4    6.25     2.0   55    66           66    +11
5    Question The Stars   3    60.0    5    6.50     2.0   60    66           66    +6
6    Horace Silver        3    60.0    6    14.75    2.0   -     66           66    +66
99   My Lord And Master   4    60.0    99   0.00     1.0   -     68           68    +0
99   Dawn Raider          4    60.0    99   0.00     1.0   -     68           68    +0
99   Knave Of Diamonds    3    60.0    99   0.00     2.0   -     66           66    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Duke Of Orange Line 66 53 66 -13 2.0
2 Global Mark 60 56 66 -10 2.0 -
3 Mr Linebreaker 58 58 63 -5 2.0 -
4 Power Surge 55 53 66 -13 2.0 -
5 Question The Stars 60 51 66 -15 2.0 -
6 Horace Silver - 42 66 -24 2.0 -
99 My Lord And Master - 55 68 -13 1.0 -
99 Dawn Raider - 53 68 -15 1.0 -
99 Knave Of Diamonds - 57 66 -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