Official NHA Assessment

Race 5: WWW.TAB4RACING.COM MIDDLE STAKES (For horses with nett rating of 101 and below)

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Line Horse
Captain Chorus
Reference for assessment
Exact Matches
0 / 12
Calculated = Official
Close Matches
0 / 12
Within 2 points
Significant Diffs
8 / 12
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    Opera Glass          4    49.5    1    0.00     3.5   85    60           60    -25
2    Earl                 4    54.0    2    0.10     3.5   79    69           69    -10
3    Captain Chorus       5    56.0    3    4.00     0.0   82    82           82    +0
4    Monsieur Chevelle    3    50.0    4    5.00     7.0   68    54           58    -10
5    Out Of Your League   5    60.0    5    8.50     0.0   93    88           88    -5
6    White Fang           4    58.0    6    9.00     3.5   87    77           77    -10
7    Arlington Action     6    56.0    7    9.75     0.0   84    80           80    -4
8    Ballroom Bliss       4    55.5    8    14.00    3.5   90    72           80    -10
9    Origami              4    59.5    9    15.50    3.5   99    80           89    -10
10   Great Affair         7    54.0    10   27.00    0.0   79    76           76    -3
99   Go Dream Machine     3    47.5    99   0.00     7.0   -     49           49    +0
99   Flying First Class   4    53.5    99   0.00     3.5   -     68           68    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Opera Glass 85 81 60 +21 3.5 -
2 Earl 79 78 69 +9 3.5 -
3 Captain Chorus Line 82 67 82 -15 0.0
4 Monsieur Chevelle 68 63 58 +5 7.0 -
5 Out Of Your League 93 77 88 -11 0.0 -
6 White Fang 87 91 77 +14 3.5 -
7 Arlington Action 84 73 80 -7 0.0 -
8 Ballroom Bliss 90 84 80 +4 3.5 -
9 Origami 99 92 89 +3 3.5 -
10 Great Affair 79 63 76 -13 0.0 -
99 Go Dream Machine - 52 49 +3 7.0 -
99 Flying First Class - 82 68 +14 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