Official NHA Assessment

Race 5: EARL OF SURREY MERIT RATED 90 DIVIDED HANDICAP (Open)

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Line Horse
Tradition
Reference for assessment
Exact Matches
1 / 4
Calculated = Official
Close Matches
2 / 4
Within 2 points
Significant Diffs
2 / 4
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    Ideal View           6    60.0    1    0.00     0.0   90    93           90    +0
2    Citrusdal            8    58.0    2    0.75     0.0   86    93           93    +7
3    Tradition            4    54.5    3    1.25     3.5   79    79           79    +0
4    Action Zone          3    58.0    4    7.25     7.0   87    75           77    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Ideal View 90 90 90 ✓ Match 0.0 -
2 Citrusdal 86 81 93 -12 0.0 -
3 Tradition Line 79 77 79 -2 3.5
4 Action Zone 87 90 77 +13 7.0 -
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