Official NHA Assessment

Race 8: DAVE BULLOCK, ARTHUR HAVERGAL, GRAHAM KENT, GINGER MASTERTON MR 84 HANDICAP (Open)

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Line Horse
Plus Four
Reference for assessment
Exact Matches
4 / 9
Calculated = Official
Close Matches
6 / 9
Within 2 points
Significant Diffs
1 / 9
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    It's Personal        3    58.0    1    0.00     3.0   85    78           85    +0
2    Plus Four            2    61.5    2    0.60     2.0   87    87           87    +0
3    Saketini             2    57.5    3    2.00     2.0   83    79           79    -4
4    Twentytwentyvision   2    58.0    4    2.05     2.0   80    80           80    +0
5    His Lordship         3    60.5    5    2.25     3.0   85    83           83    -2
6    Halberdier           4    59.5    6    2.75     3.5   83    80           80    -3
7    Antonio Gaudi        2    59.0    7    3.25     2.0   82    82           82    +0
8    Esquevelle           3    61.0    8    4.50     3.0   86    84           84    -2
9    Pivotal Role         3    59.5    9    4.55     3.0   87    81           81    -6
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 It's Personal 85 85 85 ✓ Match 3.0 -
2 Plus Four Line 87 87 87 ✓ Match 2.0
3 Saketini 83 83 79 +4 2.0 -
4 Twentytwentyvision 80 80 80 ✓ Match 2.0 -
5 His Lordship 85 85 83 +2 3.0 -
6 Halberdier 83 83 80 +3 3.5 -
7 Antonio Gaudi 82 82 82 ✓ Match 2.0 -
8 Esquevelle 86 85 84 +1 3.0 -
9 Pivotal Role 87 87 81 +6 3.0 -
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