Official NHA Assessment

Race 1: HOLLYWOODBETS DURBANVILLE WELCOMES YOU MAIDEN PLATE (For all Maidens)

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Line Horse
Kaapse Klopse
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
8 / 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    Big Unit             3    60.0    1    0.00     6.0   -     65           6     +6
2    Kaapse Klopse        2    60.0    2    0.50     0.0   82    82           82    +0
3    The Night Ferry      3    60.0    3    1.50     6.0   -     68           68    +68
4    Guarding The Wall    4    60.0    4    1.55     3.5   85    73           75    -10
5    Ramblin Man          3    60.0    5    1.60     6.0   -     68           68    +68
6    Night Bomber         4    60.0    6    2.00     3.5   -     73           73    +73
7    Mystery Cache        2    60.0    7    2.75     0.0   84    79           79    -5
8    Star Performer       2    60.5    8    4.50     0.0   84    78           78    -6
9    Island Master        3    60.0    9    4.80     6.0   -     65           65    +65
10   Renowned             2    60.0    10   9.80     0.0   75    77           77    +2
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Big Unit - 84 6 +78 6.0 -
2 Kaapse Klopse Line 82 60 82 -22 0.0
3 The Night Ferry - 62 68 -6 6.0 -
4 Guarding The Wall 85 67 75 -8 3.5 -
5 Ramblin Man - - 68 -68 6.0 -
6 Night Bomber - 96 73 +23 3.5 -
7 Mystery Cache 84 70 79 -9 0.0 -
8 Star Performer 84 82 78 +4 0.0 -
9 Island Master - 67 65 +2 6.0 -
10 Renowned 75 55 77 -22 0.0 -
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