Official NHA Assessment

Race 5: www.tabgold.co.za MR 77 HANDICAP (Open)

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Line Horse
Arverni King
Reference for assessment
Exact Matches
1 / 14
Calculated = Official
Close Matches
1 / 14
Within 2 points
Significant Diffs
10 / 14
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    Professor Snape      2    58.5    1    0.00     0.0   81    79           81    +0
2    Quantifier           2    57.0    2    2.50     0.0   78    80           80    +2
3    Arverni King         5    56.5    3    4.10     0.0   77    77           77    +0
4    Twice Golden         5    56.0    4    4.50     0.0   77    75           75    -2
5    Cyber Time           3    57.5    5    4.65     3.5   73    71           71    -2
6    Tin Cup              3    55.5    6    5.05     3.5   69    66           66    -3
7    Riccardo             7    55.0    7    7.85     0.0   67    72           72    +5
8    Tom Bombadil         5    55.0    8    11.15    0.0   67    72           72    +5
9    Twice As Perfect     3    52.0    9    13.05    3.5   54    59           59    +5
10   Aerial Display       5    59.5    10   13.35    0.0   83    81           81    -2
11   Rock Fall            2    59.0    11   17.35    0.0   82    80           80    -2
99   Catch The Tune       6    58.0    99   0.00     0.0   -     78           78    +0
99   Temperate Zone       2    53.5    99   0.00     0.0   -     69           69    +0
99   Arrow's Mark         6    52.0    99   0.00     0.0   -     66           66    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Professor Snape 81 68 81 -13 0.0 -
2 Quantifier 78 74 80 -6 0.0 -
3 Arverni King Line 77 86 77 +9 0.0
4 Twice Golden 77 84 75 +9 0.0 -
5 Cyber Time 73 81 71 +10 3.5 -
6 Tin Cup 69 74 66 +8 3.5 -
7 Riccardo 67 68 72 -4 0.0 -
8 Tom Bombadil 67 56 72 -16 0.0 -
9 Twice As Perfect 54 54 59 -5 3.5 -
10 Aerial Display 83 68 81 -13 0.0 -
11 Rock Fall 82 80 80 ✓ Match 0.0 -
99 Catch The Tune - 70 78 -8 0.0 -
99 Temperate Zone - 74 69 +5 0.0 -
99 Arrow's Mark - 54 66 -12 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