Official NHA Assessment

Race 4: DRUM STAR HANDICAP (Listed) (Open)

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Line Horse
Donald McDonald
Reference for assessment
Exact Matches
1 / 13
Calculated = Official
Close Matches
4 / 13
Within 2 points
Significant Diffs
7 / 13
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    Zillzaal             6    60.0    1    0.00     0.0   113   110          113   +0
2    Shango               5    57.5    2    1.40     0.0   108   108          108   +0
3    Nebraas              8    55.0    3    1.50     0.0   103   103          103   +0
4    Donald McDonald      5    54.5    4    2.00     0.0   102   102          102   +0
5    Tierra Del Fuego     6    56.5    5    3.50     0.0   106   104          104   -2
6    Johnny Hero          5    60.0    6    4.00     0.0   113   111          111   -2
7    Prince Evlanoff      5    53.5    7    5.00     0.0   94    97           97    +3
8    Willow Express       7    53.5    8    5.75     0.0   100   97           97    -3
9    Marchingontogether   6    59.0    9    6.75     0.0   111   108          108   -3
10   ExpressFromTheUS     5    57.5    10   7.25     0.0   108   105          105   -3
11   Youcanthurrylove     5    57.5    11   8.75     0.0   108   105          105   -3
12   African Adventure    6    58.5    12   9.00     0.0   110   107          107   -3
13   Reunion              4    56.0    13   22.00    2.0   105   98           98    -7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Zillzaal 113 112 113 -1 0.0 -
2 Shango 108 105 108 -3 0.0 -
3 Nebraas 103 101 103 -2 0.0 -
4 Donald McDonald Line 102 107 102 +5 0.0
5 Tierra Del Fuego 106 104 104 ✓ Match 0.0 -
6 Johnny Hero 113 87 111 -24 0.0 -
7 Prince Evlanoff 94 78 97 -19 0.0 -
8 Willow Express 100 82 97 -15 0.0 -
9 Marchingontogether 111 102 108 -6 0.0 -
10 ExpressFromTheUS 108 98 105 -7 0.0 -
11 Youcanthurrylove 108 86 105 -19 0.0 -
12 African Adventure 110 100 107 -7 0.0 -
13 Reunion 105 100 98 +2 2.0 -
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