Official NHA Assessment

Race 7: KEY PIETERMARITZBURG FM 88 HANDICAP (F & M) (For Fillies and Mares)

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Line Horse
Noble Storm
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
3 / 11
Within 2 points
Significant Diffs
2 / 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    Stormy Choice        4    56.5    1    0.00     2.0   82    83           82    +0
2    Noble Storm          3    54.0    2    1.50     1.5   79    79           79    +0
3    Red Roses Too        5    59.5    3    1.75     0.0   87    93           93    +6
4    Patants Heir         3    58.5    4    1.80     1.5   86    88           88    +2
5    La Divina            4    56.0    5    2.90     2.0   81    82           82    +1
6    Blue Horizon         4    55.0    6    4.10     2.0   79    80           80    +1
7    Shanta's Pride       3    55.5    7    4.15     1.5   79    82           82    +3
8    Vision To Achieve    4    56.5    8    5.85     2.0   82    83           83    +1
9    Chelsea Flower       6    49.5    9    6.00     0.0   75    73           73    -2
10   Sashay Away          3    61.0    10   8.30     1.5   90    93           93    +3
11   Juniper Green        4    56.5    11   9.40     2.0   82    83           83    +1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Stormy Choice 82 81 82 -1 2.0 -
2 Noble Storm Line 79 78 79 -1 1.5
3 Red Roses Too 87 82 93 -11 0.0 -
4 Patants Heir 86 90 88 +2 1.5 -
5 La Divina 81 77 82 -5 2.0 -
6 Blue Horizon 79 84 80 +4 2.0 -
7 Shanta's Pride 79 88 82 +6 1.5 -
8 Vision To Achieve 82 87 83 +4 2.0 -
9 Chelsea Flower 75 77 73 +4 0.0 -
10 Sashay Away 90 88 93 -5 1.5 -
11 Juniper Green 82 87 83 +4 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