Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY MAIDEN PLATE (F & M) (For Maiden F&M)

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Line Horse
Oh Mandy
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
4 / 9
Within 2 points
Significant Diffs
3 / 9
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    Olive Oyl            2    57.0    1    0.00     0.0   75    78           78    +3
2    Lady Bomber          3    60.0    2    2.50     9.0   68    68           68    +0
3    Oh Mandy             3    60.0    3    4.75     9.0   66    66           66    +0
4    Lana View            3    60.0    4    5.00     9.0   55    66           66    +11
5    Golden Croc          2    57.0    5    6.25     0.0   68    78           78    +10
6    Glimmer Of Light     3    57.0    6    11.75    9.0   -     60           60    +60
7    Secret Choice        2    57.0    7    14.25    0.0   62    78           78    +16
8    Lilic Heart          2    57.0    8    17.50    0.0   -     78           78    +78
9    Laugh Till I Cry     3    60.0    9    17.60    9.0   67    66           66    -1
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Olive Oyl 75 77 78 -1 0.0 -
2 Lady Bomber 68 87 68 +19 9.0 -
3 Oh Mandy Line 66 64 66 -2 9.0
4 Lana View 55 64 66 -2 9.0 -
5 Golden Croc 68 73 78 -5 0.0 -
6 Glimmer Of Light - 58 60 -2 9.0 -
7 Secret Choice 62 62 78 -16 0.0 -
8 Lilic Heart - 40 78 -38 0.0 -
9 Laugh Till I Cry 67 63 66 -3 9.0 -
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