Official NHA Assessment

Race 4: www.tabgold.co.za MR 63 HANDICAP (Open)

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Line Horse
Coromandel
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
5 / 12
Within 2 points
Significant Diffs
6 / 12
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    Pirate Prince        2    57.5    1    0.00     0.0   74    64           74    +0
2    Fever                5    58.0    2    2.40     0.0   59    69           69    +10
3    Coromandel           4    57.5    3    3.30     4.5   58    58           58    +0
4    Double Espresso      5    54.5    4    4.80     0.0   60    58           58    -2
5    Lord Minver          3    55.0    5    6.50     8.0   54    43           44    -10
6    Winter Royale        4    57.5    6    7.40     4.5   58    55           55    -3
7    Top Ten              4    56.5    7    9.00     4.5   56    53           53    -3
8    Oh My Word Its Roy   3    53.0    8    9.05     8.0   49    39           39    -10
9    A Thousand Tunes     4    60.0    9    9.15     4.5   63    60           60    -3
10   Sea Goddess          3    57.0    10   9.65     8.0   73    47           63    -10
11   Mode                 4    54.0    11   10.05    4.5   51    48           48    -3
12   Diamonds n Dollars   4    54.0    12   27.85    4.5   51    48           48    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Pirate Prince 74 94 74 +20 0.0 -
2 Fever 59 52 69 -17 0.0 -
3 Coromandel Line 58 59 58 +1 4.5
4 Double Espresso 60 60 58 +2 0.0 -
5 Lord Minver 54 53 44 +9 8.0 -
6 Winter Royale 58 53 55 -2 4.5 -
7 Top Ten 56 50 53 -3 4.5 -
8 Oh My Word Its Roy 49 50 39 +11 8.0 -
9 A Thousand Tunes 63 52 60 -8 4.5 -
10 Sea Goddess 73 80 63 +17 8.0 -
11 Mode 51 49 48 +1 4.5 -
12 Diamonds n Dollars 51 50 48 +2 4.5 -
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