Official NHA Assessment

Race 3: MERIT RATED 70 HANDICAP (Open)

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Line Horse
Ian's Ferrari
Reference for assessment
Exact Matches
0 / 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    Keen Spirit          3    58.0    1    0.00     8.5   66    66           66    +0
2    Ian's Ferrari        3    55.5    2    2.50     8.5   61    61           61    +0
3    Differentiate        5    60.5    3    4.00     0.0   71    88           88    +17
4    Justadoreher         5    55.0    4    4.00     0.0   60    77           77    +17
5    Kursk (AUS)          6    59.0    5    4.75     0.0   68    85           85    +17
6    Powder Puff          4    58.5    6    7.75     10.0  67    64           64    -3
99   Cool Solution        9    57.0    99   0.00     0.0   -     81           81    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Keen Spirit 66 71 66 +5 8.5 -
2 Ian's Ferrari Line 61 63 61 +2 8.5
3 Differentiate 71 72 88 -16 0.0 -
4 Justadoreher 60 68 77 -9 0.0 -
5 Kursk (AUS) 68 67 85 -18 0.0 -
6 Powder Puff 67 58 64 -6 10.0 -
99 Cool Solution - 51 81 -30 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