Official NHA Assessment

Race 6: IN MEMORY OF JAMES MAPHIRI MIDDLE STAKES (For horses with nett rating of 101 and below)

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Line Horse
Smith And Wesson
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
1 / 7
Within 2 points
Significant Diffs
6 / 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    Tchaikovsky          6    52.0    1    0.00     0.0   81    93           87    +6
2    Rollwiththepunches   6    55.5    2    0.05     0.0   90    100          100   +10
3    Smith And Wesson     2    54.0    3    0.25     6.5   84    84           84    +0
4    Longsword            2    54.0    4    0.45     6.5   85    84           84    -1
5    Kinshin Sha          4    54.0    5    0.65     11.0  84    75           75    -9
6    Karangetang          2    60.0    6    2.25     6.5   94    96           96    +2
99   Chasing Happiness    3    58.5    99   0.00     9.5   -     87           87    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Tchaikovsky 81 81 87 -6 0.0 -
2 Rollwiththepunches 90 90 100 -10 0.0 -
3 Smith And Wesson Line 84 73 84 -11 6.5
4 Longsword 85 72 84 -12 6.5 -
5 Kinshin Sha 84 62 75 -13 11.0 -
6 Karangetang 94 95 96 -1 6.5 -
99 Chasing Happiness - 110 87 +23 9.5 -
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