Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY MAIDEN PLATE (For all Maidens)

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Line Horse
River Fern
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
5 / 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    Elusive Black        3    60.0    1    0.00     7.5   66    80           72    +6
2    River Fern           2    55.0    2    1.50     5.0   75    75           75    +0
3    Miss Takes           4    60.0    3    4.00     9.0   62    77           77    +15
4    Smiddyburn           3    59.0    4    6.25     7.5   -     78           78    +78
5    Bahamian Beat        3    59.0    5    6.75     7.5   -     78           78    +78
6    Magnus The Good      2    59.0    6    12.00    5.0   79    83           83    +4
7    American Eagle       3    60.0    7    15.50    7.5   60    80           80    +20
8    Global Zee           2    60.0    8    16.75    5.0   60    85           85    +25
9    Norse Warrior        2    59.0    9    21.00    5.0   57    83           83    +26
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Elusive Black 66 68 72 -4 7.5 -
2 River Fern Line 75 73 75 -2 5.0
3 Miss Takes 62 62 77 -15 9.0 -
4 Smiddyburn - 77 78 -1 7.5 -
5 Bahamian Beat - 73 78 -5 7.5 -
6 Magnus The Good 79 74 83 -9 5.0 -
7 American Eagle 60 59 80 -21 7.5 -
8 Global Zee 60 50 85 -35 5.0 -
9 Norse Warrior 57 56 83 -27 5.0 -
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