Official NHA Assessment

Race 4: MERIT RATED 82 HANDICAP (Open)

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Line Horse
Emerald Floe
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
5 / 7
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    In Good Time         5    55.0    1    0.00     0.0   71    77           71    +0
2    Emerald Floe         4    57.0    2    0.10     2.5   76    76           76    +0
3    Jubilee              7    56.0    3    1.10     0.0   82    83           83    +1
4    Citrusdal            8    60.0    4    1.20     0.0   82    91           91    +9
5    Butchie Boy          7    59.0    5    2.20     0.0   80    88           88    +8
6    Varnica              5    58.5    6    4.20     0.0   79    85           85    +6
7    Gladstone            5    60.0    7    6.70     0.0   82    87           87    +5
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 In Good Time 71 71 71 ✓ Match 0.0 -
2 Emerald Floe Line 76 82 76 +6 2.5
3 Jubilee 82 72 83 -11 0.0 -
4 Citrusdal 82 81 91 -10 0.0 -
5 Butchie Boy 80 78 88 -10 0.0 -
6 Varnica 79 90 85 +5 0.0 -
7 Gladstone 82 81 87 -6 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