Official NHA Assessment

Race 1: 4RACING WELCOMES YOU WORK RIDERS MAIDEN PLATE (For all Maidens. R15 000 Win bonus ROA Members)

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Line Horse
Magic Prince
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
7 / 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    Open Highway         4    57.0    1    0.00     0.0   -     68           6     +6
2    Magic Prince         2    60.0    2    3.25     1.5   71    71           71    +0
3    Richard The First    2    57.0    3    4.25     1.5   -     65           65    +65
4    Activator            3    60.0    4    5.25     2.5   58    69           69    +11
5    Klitsgras            2    55.5    5    6.00     1.5   -     62           62    +62
6    Golden Torrent       3    60.0    6    7.20     2.5   -     69           69    +69
7    Heartlight           2    57.5    7    7.25     1.5   59    66           66    +7
8    Full Go              6    60.0    8    8.00     0.0   61    74           74    +13
99   Privilege            3    60.0    99   0.00     2.5   -     69           69    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Open Highway - 94 6 +88 0.0 -
2 Magic Prince Line 71 66 71 -5 1.5
3 Richard The First - 87 65 +22 1.5 -
4 Activator 58 66 69 -3 2.5 -
5 Klitsgras - 75 62 +13 1.5 -
6 Golden Torrent - 51 69 -18 2.5 -
7 Heartlight 59 48 66 -18 1.5 -
8 Full Go 61 59 74 -15 0.0 -
99 Privilege - 62 69 -7 2.5 -
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