Official NHA Assessment

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

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Line Horse
Alpenhorn
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
7 / 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    Specially Selected   3    60.0    1    0.00     2.0   71    65           65    -6
2    Alpenhorn            3    60.0    2    7.90     2.0   65    65           65    +0
3    National Dream       6    60.0    3    9.20     0.0   -     69           69    +69
4    Reef Bound           3    60.0    4    11.30    2.0   53    65           65    +12
5    Ravens Sword         3    60.0    5    11.45    2.0   66    65           65    -1
6    So Dacha             3    58.5    6    15.25    2.0   38    62           62    +24
7    Midnight Gold        3    60.0    7    16.45    2.0   -     65           65    +65
8    Mandala Effect       3    56.0    8    17.95    2.0   57    57           57    +0
9    Vorticity            4    60.0    9    40.45    1.0   -     67           67    +67
99   Saka Gold            3    60.0    99   0.00     2.0   -     65           65    +0
99   Liketheclappers      3    60.0    99   0.00     2.0   -     65           65    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Specially Selected 71 72 65 +7 2.0 -
2 Alpenhorn Line 65 58 65 -7 2.0
3 National Dream - 68 69 -1 0.0 -
4 Reef Bound 53 56 65 -9 2.0 -
5 Ravens Sword 66 53 65 -12 2.0 -
6 So Dacha 38 48 62 -14 2.0 -
7 Midnight Gold - 55 65 -10 2.0 -
8 Mandala Effect 57 54 57 -3 2.0 -
9 Vorticity - 38 67 -29 1.0 -
99 Saka Gold - 60 65 -5 2.0 -
99 Liketheclappers - 63 65 -2 2.0 -
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