Official NHA Assessment

Race 7: RACE COAST CLASS 3 (Open. Benchmark at 60.0kg = 96)

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Line Horse
Riverstone
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
6 / 11
Within 2 points
Significant Diffs
5 / 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    Licence To Thrill    4    58.5    1    0.00     2.0   93    90           90    -3
2    Wiccan Warrior       2    52.5    2    0.05     0.5   89    81           81    -8
3    Riverstone           2    55.0    3    2.25     0.5   86    86           86    +0
4    Gorgeous Guy         2    53.5    4    2.55     0.5   83    83           83    +0
5    Smorgasbord          6    53.5    5    3.65     0.0   83    84           84    +1
6    Maphaka              2    54.5    6    6.45     0.5   86    85           85    -1
7    Good Traveller       6    57.0    7    7.15     0.0   93    91           91    -2
8    Elizabedi Gold       3    48.5    8    7.85     1.5   82    71           72    -10
9    Proud Master         3    61.0    9    8.35     1.5   101   96           96    -5
10   Officer In Command   4    51.5    10   11.45    2.0   87    76           77    -10
11   Khethiwe's Destiny   3    60.0    11   99.99    1.5   97    94           94    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Licence To Thrill 93 98 90 +8 2.0 -
2 Wiccan Warrior 89 80 81 -1 0.5 -
3 Riverstone Line 86 84 86 -2 0.5
4 Gorgeous Guy 83 81 83 -2 0.5 -
5 Smorgasbord 83 77 84 -7 0.0 -
6 Maphaka 86 87 85 +2 0.5 -
7 Good Traveller 93 108 91 +17 0.0 -
8 Elizabedi Gold 82 78 72 +6 1.5 -
9 Proud Master 101 97 96 +1 1.5 -
10 Officer In Command 87 86 77 +9 2.0 -
11 Khethiwe's Destiny 97 92 94 -2 1.5 -
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