Official NHA Assessment

Race 2: www.tabgold.co.za MAIDEN PLATE (For all Maidens)

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Line Horse
Apex Predator
Reference for assessment
Exact Matches
0 / 13
Calculated = Official
Close Matches
2 / 13
Within 2 points
Significant Diffs
11 / 13
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    Immah                3    58.0    1    0.00     10.5  -     75           6     +6
2    Apex Predator        4    60.0    2    0.30     12.0  76    76           76    +0
3    Rosa Osiria          3    55.5    3    3.40     10.5  76    70           70    -6
4    Railroad             2    58.5    4    5.00     7.0   66    83           83    +17
5    Chakpori             3    55.5    5    5.50     10.5  65    70           70    +5
6    Fine Dining          3    54.0    6    7.10     10.5  -     67           67    +67
7    Strategic Point      2    58.0    7    7.90     7.0   72    82           82    +10
8    La Maddalena         3    55.5    8    8.00     10.5  -     70           70    +70
9    Bomber Stream        4    56.0    9    9.20     12.0  66    68           68    +2
10   Isiqalaba            3    56.0    10   9.40     10.5  55    71           71    +16
11   Mo King              2    60.0    11   9.60     7.0   71    86           86    +15
12   The Iron Duke        3    58.0    12   12.40    10.5  -     75           75    +75
13   I Am Classy          3    58.0    13   14.50    10.5  -     75           75    +75
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Immah - 82 6 +76 10.5 -
2 Apex Predator Line 76 69 76 -7 12.0
3 Rosa Osiria 76 57 70 -13 10.5 -
4 Railroad 66 60 83 -23 7.0 -
5 Chakpori 65 64 70 -6 10.5 -
6 Fine Dining - 66 67 -1 10.5 -
7 Strategic Point 72 66 82 -16 7.0 -
8 La Maddalena - 71 70 +1 10.5 -
9 Bomber Stream 66 52 68 -16 12.0 -
10 Isiqalaba 55 55 71 -16 10.5 -
11 Mo King 71 66 86 -20 7.0 -
12 The Iron Duke - 64 75 -11 10.5 -
13 I Am Classy - 67 75 -8 10.5 -
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