Official NHA Assessment

Race 1: WELCOME TO NELSON MANDELA BAY OPEN MAIDEN (For all Maidens)

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Line Horse
Global Scene
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
6 / 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    Donny's Boy          3    60.0    1    0.00     1.5   62    61           61    -1
2    Sempre Bella         3    51.5    2    2.75     1.5   53    47           47    -6
3    Global Scene         2    58.5    3    2.85     0.0   64    64           64    +0
4    Preserve Forever     3    53.0    4    3.10     1.5   58    50           50    -8
5    Celtique             3    52.0    5    3.35     1.5   51    48           48    -3
6    Take A Mulligan      4    55.5    6    5.60     0.5   50    54           54    +4
7    Mafiabagsthemoney    5    53.5    7    9.85     0.0   35    51           51    +16
8    Battle Of Britain    3    56.0    8    18.10    1.5   59    53           53    -6
99   Cheap Thrills        4    53.5    99   0.00     0.5   -     50           50    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Donny's Boy 62 68 61 +7 1.5 -
2 Sempre Bella 53 56 47 +9 1.5 -
3 Global Scene Line 64 61 64 -3 0.0
4 Preserve Forever 58 53 50 +3 1.5 -
5 Celtique 51 58 48 +10 1.5 -
6 Take A Mulligan 50 50 54 -4 0.5 -
7 Mafiabagsthemoney 35 39 51 -12 0.0 -
8 Battle Of Britain 59 59 53 +6 1.5 -
99 Cheap Thrills - 56 50 +6 0.5 -
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