Official NHA Assessment

Race 7: HAMTERN MIDDLE STAKES (For horses with nett rating of 105 and below)

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Line Horse
Potberrie
Reference for assessment
Exact Matches
0 / 9
Calculated = Official
Close Matches
0 / 9
Within 2 points
Significant Diffs
6 / 9
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    Max The Magician     4    56.0    1    0.00     6.0   92    78           78    -14
2    Potberrie            2    60.0    2    2.00     0.0   101   101          101   +0
3    Kudzu                2    54.5    3    3.00     0.0   86    89           89    +3
4    Player               3    56.0    4    3.20     8.5   91    75           81    -10
5    Master Christmas     4    54.0    5    4.00     6.0   97    75           87    -10
6    Daimyo               3    56.0    6    4.30     8.5   92    73           82    -10
7    Paul Revere          3    49.5    7    4.60     8.5   84    60           74    -10
8    Curtiss Condor       3    50.5    8    8.30     8.5   79    62           69    -10
9    Command Pilot        2    56.0    9    10.00    0.0   93    90           90    -3
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Max The Magician 92 95 78 +17 6.0 -
2 Potberrie Line 101 105 101 +4 0.0
3 Kudzu 86 80 89 -9 0.0 -
4 Player 91 84 81 +3 8.5 -
5 Master Christmas 97 94 87 +7 6.0 -
6 Daimyo 92 105 82 +23 8.5 -
7 Paul Revere 84 92 74 +18 8.5 -
8 Curtiss Condor 79 79 69 +10 8.5 -
9 Command Pilot 93 93 90 +3 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