Official NHA Assessment

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

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Line Horse
Hamlet
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
1 / 11
Within 2 points
Significant Diffs
4 / 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    Admirals Chance      5    59.0    1    0.00     0.0   69    69           69    +0
2    Hamlet               4    60.0    2    4.25     9.0   53    53           53    +0
3    Captain Morne        3    60.0    3    4.30     7.5   60    56           56    -4
4    Dog Detachment       4    60.0    4    7.05     9.0   59    53           53    -6
5    Goom Goom            3    60.0    5    7.30     7.5   58    56           56    -2
6    This Time Round      2    59.0    6    9.80     5.0   59    59           59    +0
7    Le Bonheur           2    59.0    7    10.55    5.0   -     59           59    +59
8    Western Jack         3    59.0    8    14.30    7.5   -     54           54    +54
9    Deep Dive            3    60.0    9    17.55    7.5   30    56           56    +26
10   Total Eclipse        2    59.0    10   24.80    5.0   -     59           59    +59
99   Cliffs Of Dover      2    59.0    99   0.00     5.0   -     59           59    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Admirals Chance 69 77 69 +8 0.0 -
2 Hamlet Line 53 50 53 -3 9.0
3 Captain Morne 60 53 56 -3 7.5 -
4 Dog Detachment 59 60 53 +7 9.0 -
5 Goom Goom 58 59 56 +3 7.5 -
6 This Time Round 59 54 59 -5 5.0 -
7 Le Bonheur - 60 59 +1 5.0 -
8 Western Jack - 50 54 -4 7.5 -
9 Deep Dive 30 39 56 -17 7.5 -
10 Total Eclipse - 35 59 -24 5.0 -
99 Cliffs Of Dover - 55 59 -4 5.0 -
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