Official NHA Assessment

Race 8: NEXT FAIRVIEW RACEMEETING FRIDAY 29 NOVEMBER MR 74 HANDICAP (Open)

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Line Horse
Purple Operator
Reference for assessment
Exact Matches
2 / 14
Calculated = Official
Close Matches
4 / 14
Within 2 points
Significant Diffs
7 / 14
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    Arturo               2    59.5    1    0.00     5.0   73    78           73    +0
2    Swiss Walt           4    57.5    2    0.10     9.0   69    66           66    -3
3    Charlie Malone       5    56.5    3    0.20     0.0   67    82           82    +15
4    Purple Operator      3    60.0    4    0.70     7.5   74    74           74    +0
5    Ravilious            3    58.0    5    2.70     7.5   80    70           70    -10
6    Holocene             4    60.0    6    3.20     9.0   74    71           71    -3
7    My Ami Beach         6    60.5    7    3.95     0.0   75    90           90    +15
8    Notorix              6    61.5    8    4.70     0.0   77    92           92    +15
9    Electric Storm       3    59.0    9    4.95     7.5   72    72           72    +0
10   Graduation Time      4    59.5    10   5.00     9.0   73    70           70    -3
11   A Bit Chilly         3    59.0    11   5.10     7.5   82    72           72    -10
12   Winning Captain      3    53.5    12   5.35     7.5   61    61           61    +0
12   No Greater Love      5    58.0    12   5.35     0.0   70    85           85    +15
14   Lucky Spirit         3    56.5    14   7.10     7.5   77    67           67    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Arturo 73 76 73 +3 5.0 -
2 Swiss Walt 69 74 66 +8 9.0 -
3 Charlie Malone 67 71 82 -11 0.0 -
4 Purple Operator Line 74 74 74 ✓ Match 7.5
5 Ravilious 80 81 70 +11 7.5 -
6 Holocene 74 76 71 +5 9.0 -
7 My Ami Beach 75 70 90 -20 0.0 -
8 Notorix 77 68 92 -24 0.0 -
9 Electric Storm 72 70 72 -2 7.5 -
10 Graduation Time 73 70 70 ✓ Match 9.0 -
11 A Bit Chilly 82 73 72 +1 7.5 -
12 Winning Captain 61 54 61 -7 7.5 -
12 No Greater Love 70 68 85 -17 0.0 -
14 Lucky Spirit 77 70 67 +3 7.5 -
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