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
1 / 10
Calculated = Official
Close Matches
5 / 10
Within 2 points
Significant Diffs
4 / 10
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    Garden Sun           3    61.0    1    0.00     2.0   70    68           68    -2
2    Global Scene         2    55.5    2    3.75     0.0   63    63           63    +0
3    Cosmic Cliffs        3    51.5    3    11.25    2.0   59    49           49    -10
4    Global Speak         3    58.0    4    11.75    2.0   64    62           62    -2
5    Incendiary           3    55.5    5    14.25    2.0   59    57           57    -2
6    Darling Girl         2    51.5    6    18.50    0.0   55    53           53    -2
7    Canford's Beauty     3    52.5    7    25.00    2.0   58    51           51    -7
8    Top Dollar           5    53.0    8    27.00    0.0   49    56           56    +7
99   Lord Quinn           4    56.0    99   0.00     0.5   -     61           61    +0
99   Sempre Bella         3    52.0    99   0.00     2.0   -     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 Garden Sun 70 69 68 +1 2.0 -
2 Global Scene Line 63 61 63 -2 0.0
3 Cosmic Cliffs 59 67 49 +18 2.0 -
4 Global Speak 64 64 62 +2 2.0 -
5 Incendiary 59 54 57 -3 2.0 -
6 Darling Girl 55 54 53 +1 0.0 -
7 Canford's Beauty 58 51 51 ✓ Match 2.0 -
8 Top Dollar 49 42 56 -14 0.0 -
99 Lord Quinn - 54 61 -7 0.5 -
99 Sempre Bella - 56 50 +6 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