Official NHA Assessment

Race 2: MERIT RATED 63 HANDICAP (Open)

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Line Horse
Days Gone By
Reference for assessment
Exact Matches
0 / 5
Calculated = Official
Close Matches
1 / 5
Within 2 points
Significant Diffs
2 / 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    Walking Thru Time    3    60.0    1    0.00     8.0   64    62           64    +0
2    Power Ranger         7    57.0    2    0.05     0.0   57    72           72    +15
3    Days Gone By         3    54.5    3    4.00     8.0   52    52           52    +0
4    Nandine              3    57.5    4    99.00    8.0   59    57           57    -2
99   Duchess Of War       2    57.5    99   0.00     0.0   -     73           73    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Walking Thru Time 64 73 64 +9 8.0 -
2 Power Ranger 57 69 72 -3 0.0 -
3 Days Gone By Line 52 51 52 -1 8.0
4 Nandine 59 60 57 +3 8.0 -
99 Duchess Of War - 55 73 -18 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