Official NHA Assessment

Race 8: TAB 4RACING APP APPRENTICE CLASSIFIED STAKES (For horses with nett rating of 74 and below)

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Line Horse
Russian Empire
Reference for assessment
Exact Matches
0 / 11
Calculated = Official
Close Matches
2 / 11
Within 2 points
Significant Diffs
6 / 11
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    King Viserys         4    54.0    1    0.00     10.0  68    46           46    -22
2    Hoerikwaggo          3    54.0    2    1.50     8.5   74    49           64    -10
3    Russian Empire       5    48.5    3    5.75     0.0   55    55           55    +0
4    The Roaring Rock     2    56.5    4    6.25     5.5   79    60           69    -10
5    Tokyo Medaglia       3    56.0    5    7.00     8.5   72    53           62    -10
6    James Fitzjames      2    56.0    6    7.10     5.5   71    59           61    -10
7    Rougarouin           4    56.0    7    7.60     10.0  71    50           61    -10
8    Globetonic           6    57.5    8    7.65     0.0   71    73           73    +2
9    Supreme Judge        2    53.5    9    8.15     5.5   76    54           66    -10
10   Flight Engineer      3    52.0    10   8.90     8.5   66    45           56    -10
11   Away With Red        3    54.0    11   9.40     8.5   68    49           58    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 King Viserys 68 73 46 +27 10.0 -
2 Hoerikwaggo 74 85 64 +21 8.5 -
3 Russian Empire Line 55 53 55 -2 0.0
4 The Roaring Rock 79 79 69 +10 5.5 -
5 Tokyo Medaglia 72 68 62 +6 8.5 -
6 James Fitzjames 71 66 61 +5 5.5 -
7 Rougarouin 71 69 61 +8 10.0 -
8 Globetonic 71 77 73 +4 0.0 -
9 Supreme Judge 76 77 66 +11 5.5 -
10 Flight Engineer 66 58 56 +2 8.5 -
11 Away With Red 68 62 58 +4 8.5 -
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