Official NHA Assessment

Race 5: 4RACING.TV MR 84 HANDICAP (Open)

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Line Horse
Fifth Of July
Reference for assessment
Exact Matches
2 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
6 / 8
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    Jaimala              4    58.5    1    0.00     0.5   81    77           81    +0
2    Fifth Of July        5    56.5    2    3.00     0.0   77    77           77    +0
3    Tattenham Hill       3    56.0    3    3.25     1.5   79    73           73    -6
4    Leeson               3    57.0    4    6.25     1.5   81    72           72    -9
5    Another Level        3    60.0    5    7.50     1.5   87    78           78    -9
6    Arlington Action     6    51.0    6    7.75     0.0   72    63           63    -9
7    Have A Go Jo         4    58.0    7    13.25    0.5   80    76           76    -4
8    Wolffs World         4    59.5    8    14.00    0.5   83    79           79    -4
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Jaimala 81 101 81 +20 0.5 -
2 Fifth Of July Line 77 63 77 -14 0.0
3 Tattenham Hill 79 79 73 +6 1.5 -
4 Leeson 81 72 72 ✓ Match 1.5 -
5 Another Level 87 86 78 +8 1.5 -
6 Arlington Action 72 73 63 +10 0.0 -
7 Have A Go Jo 80 70 76 -6 0.5 -
8 Wolffs World 83 79 79 ✓ Match 0.5 -
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