Official NHA Assessment

Race 3: MERIT RATED 85 HANDICAP (Open)

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Line Horse
Ultimate Jewel
Reference for assessment
Exact Matches
0 / 4
Calculated = Official
Close Matches
1 / 4
Within 2 points
Significant Diffs
1 / 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    Red Top              5    54.0    1    0.00     0.0   73    73           73    +0
2    Kallipos             3    54.5    2    0.75     6.0   74    62           64    -10
3    Ultimate Jewel       5    60.0    3    1.50     0.0   85    85           85    +0
4    Tradition            4    57.0    4    13.50    7.0   79    65           69    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Red Top 73 70 73 -3 0.0 -
2 Kallipos 74 63 64 -1 6.0 -
3 Ultimate Jewel Line 85 80 85 -5 0.0
4 Tradition 79 77 69 +8 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