Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY MAIDEN PLATE (For Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Western Jack
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 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    Gimme A Diamond      2    60.0    1    0.00     7.0   69    62           62    -7
2    Bennelong Point      2    60.0    2    0.75     7.0   54    62           62    +8
3    Pembroke             3    60.0    3    1.25     10.5  70    55           60    -10
4    The Charioteer       2    58.0    4    2.25     7.0   -     58           58    +58
5    Western Jack         3    60.0    5    3.50     10.5  55    55           55    +0
6    Valyrian Sword       2    58.0    6    11.25    7.0   70    58           60    -10
7    Dashing Legend       3    57.5    7    21.75    10.5  28    50           50    +22
8    American Hashtag     3    60.0    8    25.00    10.5  52    55           55    +3
99   Janneman             4    60.0    99   0.00     12.0  -     52           52    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Gimme A Diamond 69 54 62 -8 7.0 -
2 Bennelong Point 54 58 62 -4 7.0 -
3 Pembroke 70 79 60 +19 10.5 -
4 The Charioteer - 71 58 +13 7.0 -
5 Western Jack Line 55 50 55 -5 10.5
6 Valyrian Sword 70 50 60 -10 7.0 -
7 Dashing Legend 28 15 50 -35 10.5 -
8 American Hashtag 52 52 55 -3 10.5 -
99 Janneman - 20 52 -32 12.0 -
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