Official NHA Assessment

Race 4: MERIT RATED 80 HANDICAP (Open)

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Line Horse
Tulip Way
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
2 / 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    Obscure              4    60.0    1    0.00     4.0   80    69           80    +0
2    Jubilee              7    59.5    2    0.05     0.0   79    76           76    -3
3    Tulip Way            5    57.5    3    1.55     0.0   75    75           75    +0
4    Mind Master          4    60.0    4    2.55     4.0   80    71           71    -9
5    Differentiate        5    56.5    5    3.05     0.0   73    72           72    -1
6    Kursk (AUS)          6    53.0    6    5.05     0.0   66    63           63    -3
7    Magic Mike           6    56.5    7    5.30     0.0   73    70           70    -3
8    Viscountess Vivien   6    57.0    8    6.80     0.0   74    71           71    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Obscure 80 87 80 +7 4.0 -
2 Jubilee 79 72 76 -4 0.0 -
3 Tulip Way Line 75 80 75 +5 0.0
4 Mind Master 80 87 71 +16 4.0 -
5 Differentiate 73 72 72 ✓ Match 0.0 -
6 Kursk (AUS) 66 67 63 +4 0.0 -
7 Magic Mike 73 67 70 -3 0.0 -
8 Viscountess Vivien 74 72 71 +1 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