Official NHA Assessment

Race 5: MERIT RATED 64 HANDICAP (Open)

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Line Horse
Deposition
Reference for assessment
Exact Matches
1 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
2 / 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    Kursk (AUS)          6    60.0    1    0.00     0.0   64    63           64    +0
2    Centre Stage         5    50.0    2    0.50     0.0   49    48           48    -1
3    Deposition           6    60.0    3    3.50     0.0   64    64           64    +0
4    Viscountess Vivien   6    60.0    4    8.50     0.0   64    63           63    -1
5    State Your Case      3    48.0    5    14.50    3.5   50    32           40    -10
6    Ian's Ferrari        3    54.5    6    19.50    3.5   60    45           50    -10
7    Manvir               3    53.0    7    20.00    3.5   57    42           47    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Kursk (AUS) 64 67 64 +3 0.0 -
2 Centre Stage 49 52 48 +4 0.0 -
3 Deposition Line 64 68 64 +4 0.0
4 Viscountess Vivien 64 72 63 +9 0.0 -
5 State Your Case 50 40 40 ✓ Match 3.5 -
6 Ian's Ferrari 60 63 50 +13 3.5 -
7 Manvir 57 52 47 +5 3.5 -
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