Official NHA Assessment

Race 5: DRAKENSTEIN STUD MR 76 HANDICAP (Open)

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Line Horse
Parktown
Reference for assessment
Exact Matches
1 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
4 / 11
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    Northern Warrior     7    54.5    1    0.00     0.0   68    65           68    +0
2    Strawberry Bear      2    59.5    2    1.30     5.5   86    64           76    -10
3    Parktown             5    56.5    3    2.50     0.0   69    69           69    +0
4    Stanley Park         2    57.5    4    3.60     5.5   82    60           72    -10
5    Son Of Zeus          3    59.5    5    4.10     8.5   75    58           65    -10
6    We All Chomies       5    49.5    6    4.25     0.0   60    55           55    -5
7    Prince Tyrion        4    52.0    7    5.75     10.0  59    40           49    -10
8    Winter Baron         2    60.0    8    5.80     5.5   87    65           77    -10
9    Question Master      2    57.5    9    7.40     5.5   82    60           72    -10
10   Stevie Gee           5    58.0    10   19.80    0.0   83    72           73    -10
99   Captain Ariano       4    57.5    99   0.00     10.0  -     51           51    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Northern Warrior 68 73 68 +5 0.0 -
2 Strawberry Bear 86 106 76 +30 5.5 -
3 Parktown Line 69 69 69 ✓ Match 0.0
4 Stanley Park 82 69 72 -3 5.5 -
5 Son Of Zeus 75 81 65 +16 8.5 -
6 We All Chomies 60 54 55 -1 0.0 -
7 Prince Tyrion 59 54 49 +5 10.0 -
8 Winter Baron 87 81 77 +4 5.5 -
9 Question Master 82 70 72 -2 5.5 -
10 Stevie Gee 83 65 73 -8 0.0 -
99 Captain Ariano - 63 51 +12 10.0 -
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