Official NHA Assessment

Race 5: STEENKAMP MARIA / ZIBANE THOLAKELE MAIDEN PLATE (For all Maidens)

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Line Horse
Vihaan's Bomb
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
0 / 11
Within 2 points
Significant Diffs
11 / 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    Vihaan's Bomb        3    60.0    1    0.00     5.0   79    79           79    +0
2    Basie Raakvat        4    60.0    2    5.10     2.0   70    85           85    +15
3    Iron Monger          2    60.0    3    5.20     0.0   62    89           89    +27
4    Agamemnon            3    60.0    4    7.00     5.0   68    79           79    +11
5    The Green Gallant    6    60.0    5    7.40     0.0   61    89           89    +28
6    Triton               3    58.5    6    8.90     5.0   63    76           76    +13
7    Rainbow Of Roses     3    56.5    7    10.00    5.0   72    72           72    +0
8    Chief Of Staff       3    58.5    8    10.90    5.0   54    76           76    +22
9    The Noah             2    60.0    9    12.20    0.0   71    89           89    +18
10   Summer Lightning     3    60.0    10   14.30    5.0   47    79           79    +32
99   Trip To Nebraska     2    56.5    99   0.00     0.0   -     82           82    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Vihaan's Bomb Line 79 86 79 +7 5.0
2 Basie Raakvat 70 63 85 -22 2.0 -
3 Iron Monger 62 64 89 -25 0.0 -
4 Agamemnon 68 58 79 -21 5.0 -
5 The Green Gallant 61 55 89 -34 0.0 -
6 Triton 63 52 76 -24 5.0 -
7 Rainbow Of Roses 72 66 72 -6 5.0 -
8 Chief Of Staff 54 58 76 -18 5.0 -
9 The Noah 71 68 89 -21 0.0 -
10 Summer Lightning 47 46 79 -33 5.0 -
99 Trip To Nebraska - 55 82 -27 0.0 -
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