Official NHA Assessment

Race 2: GRADUATION PLATE (Maidens,1 & 2 time winners)

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Line Horse
Differentiate
Reference for assessment
Exact Matches
0 / 6
Calculated = Official
Close Matches
1 / 6
Within 2 points
Significant Diffs
5 / 6
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    Differentiate        5    53.0    1    0.00     0.0   60    60           60    +0
2    Ian's Ferrari        3    54.5    2    0.25     3.5   60    56           56    -4
3    Centre Stage         5    51.5    3    1.25     0.0   49    61           61    +12
4    Chetan               3    54.5    4    3.00     3.5   58    58           58    +0
5    Karvani              7    60.0    5    3.50     0.0   68    75           75    +7
99   Manvir               3    58.0    99   0.00     3.5   -     63           63    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Differentiate Line 60 72 60 +12 0.0
2 Ian's Ferrari 60 63 56 +7 3.5 -
3 Centre Stage 49 52 61 -9 0.0 -
4 Chetan 58 45 58 -13 3.5 -
5 Karvani 68 73 75 -2 0.0 -
99 Manvir - 52 63 -11 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