Official NHA Assessment

Race 2: CITY OF CAPE TOWN OPEN MAIDEN (For all Maidens)

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Line Horse
Guarding The Wall
Reference for assessment
Exact Matches
0 / 18
Calculated = Official
Close Matches
0 / 18
Within 2 points
Significant Diffs
16 / 18
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    Guarding The Wall    4    57.5    1    0.00     7.0   78    78           78    +0
2    Tambourine Man       5    53.5    2    0.30     0.0   57    84           84    +27
3    Approach Shot        2    54.5    3    1.80     4.0   72    78           78    +6
4    Champagne Mac        4    52.0    4    2.30     7.0   62    67           67    +5
5    Prankster            2    55.0    5    4.55     4.0   78    79           79    +1
6    Patrick's One        3    61.0    6    5.55     6.0   -     87           87    +87
7    Stars In Heaven      2    57.5    7    6.80     4.0   78    84           84    +6
8    Otis The Brave       3    56.0    8    6.85     6.0   67    77           77    +10
9    In The Bag           4    57.0    9    8.85     7.0   76    77           77    +1
10   Moonacres            2    57.5    10   11.10    4.0   78    84           84    +6
11   Come On You Spurs    2    52.5    11   13.35    4.0   51    74           74    +23
12   Aspect               2    57.0    12   15.35    4.0   69    83           83    +14
13   William's Legacy     2    52.5    13   16.10    4.0   51    74           74    +23
14   Tokyo Tower          2    61.0    14   16.60    4.0   -     91           91    +91
15   The Joker            3    61.0    15   22.85    6.0   -     87           87    +87
16   Mcenroe              3    61.0    16   28.10    6.0   -     87           87    +87
99   Tom's Diner          4    61.0    99   0.00     7.0   -     85           85    +0
99   Salute The Flag      3    61.0    99   0.00     6.0   -     87           87    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Guarding The Wall Line 78 67 78 -11 7.0
2 Tambourine Man 57 64 84 -20 0.0 -
3 Approach Shot 72 70 78 -8 4.0 -
4 Champagne Mac 62 55 67 -12 7.0 -
5 Prankster 78 69 79 -10 4.0 -
6 Patrick's One - 70 87 -17 6.0 -
7 Stars In Heaven 78 87 84 +3 4.0 -
8 Otis The Brave 67 59 77 -18 6.0 -
9 In The Bag 76 61 77 -16 7.0 -
10 Moonacres 78 66 84 -18 4.0 -
11 Come On You Spurs 51 51 74 -23 4.0 -
12 Aspect 69 93 83 +10 4.0 -
13 William's Legacy 51 66 74 -8 4.0 -
14 Tokyo Tower - - 91 - 4.0 -
15 The Joker - - 87 -87 6.0 -
16 Mcenroe - 23 87 -64 6.0 -
99 Tom's Diner - 94 85 +9 7.0 -
99 Salute The Flag - 81 87 -6 6.0 -
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