Official NHA Assessment

Race 6: MERIT RATED 98 HANDICAP (Open)

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Line Horse
Sun Bird
Reference for assessment
Exact Matches
1 / 5
Calculated = Official
Close Matches
2 / 5
Within 2 points
Significant Diffs
3 / 5
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    Holy Land            6    60.0    1    0.00     0.0   98    108          98    +0
2    Wantage              8    58.0    2    0.25     0.0   94    104          104   +10
3    Sun Bird             3    54.5    3    1.25     7.0   87    87           87    +0
4    Only Him             4    59.0    4    1.75     4.0   96    101          101   +5
5    Citrusdal            8    54.5    5    5.75     0.0   87    97           97    +10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Holy Land 98 97 98 -1 0.0 -
2 Wantage 94 78 104 -26 0.0 -
3 Sun Bird Line 87 87 87 ✓ Match 7.0
4 Only Him 96 87 101 -14 4.0 -
5 Citrusdal 87 81 97 -16 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