Official NHA Assessment

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

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Line Horse
Spy Story
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
1 / 12
Within 2 points
Significant Diffs
9 / 12
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    Legendary            2    59.0    1    0.00     0.0   78    82           82    +4
2    Chieftain's Shield   4    58.5    2    0.40     2.5   66    81           81    +15
3    Oklahoma Twister     4    60.0    3    1.20     2.5   64    83           83    +19
4    Spy Story            3    59.0    4    3.70     5.0   73    73           73    +0
5    Spirito Selvaggio    2    59.0    5    5.30     0.0   78    82           82    +4
6    Gun Barrel           3    59.0    6    6.50     5.0   -     72           72    +72
7    Parabellum           3    59.0    7    8.00     5.0   69    72           72    +3
8    Stop The Traffic     4    60.0    8    9.50     2.5   52    79           79    +27
9    Ragamuffin           2    60.0    9    10.75    0.0   52    84           84    +32
10   Blue Crystal         3    59.0    10   13.75    5.0   72    72           72    +0
11   Lord Of The North    3    59.0    11   14.50    5.0   -     72           72    +72
99   Peak Predator        4    60.0    99   0.00     2.5   -     79           79    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Legendary 78 69 82 -13 0.0 -
2 Chieftain's Shield 66 80 81 -1 2.5 -
3 Oklahoma Twister 64 71 83 -12 2.5 -
4 Spy Story Line 73 66 73 -7 5.0
5 Spirito Selvaggio 78 77 82 -5 0.0 -
6 Gun Barrel - 68 72 -4 5.0 -
7 Parabellum 69 61 72 -11 5.0 -
8 Stop The Traffic 52 65 79 -14 2.5 -
9 Ragamuffin 52 45 84 -39 0.0 -
10 Blue Crystal 72 51 72 -21 5.0 -
11 Lord Of The North - 48 72 -24 5.0 -
99 Peak Predator - 57 79 -22 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