Official NHA Assessment

Race 2: TRACK & BALL GAMING MR 66 HANDICAP (Open)

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Line Horse
Mac Hardy
Reference for assessment
Exact Matches
1 / 10
Calculated = Official
Close Matches
3 / 10
Within 2 points
Significant Diffs
2 / 10
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    Brass Bell           8    55.5    1    0.00     0.0   57    57           57    +0
2    Mac Hardy            4    56.5    2    0.05     0.0   59    59           59    +0
3    Stevie Gee           5    57.5    3    0.10     0.0   61    61           61    +0
4    Masterbling          3    56.0    4    1.00     2.5   58    53           53    -5
5    Space Cowboy         3    62.0    5    1.40     2.5   70    65           65    -5
6    Cannatonic           3    55.0    6    2.00     2.5   56    51           51    -5
7    Purple Powahouse     8    57.0    7    2.30     0.0   63    60           60    -3
8    Get Carter           4    52.0    8    2.60     0.0   48    50           50    +2
9    Victor Rail          5    57.5    9    3.20     0.0   61    61           61    +0
10   Granddaddy Purple    3    49.0    10   4.80     2.5   52    39           42    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Brass Bell 57 55 57 -2 0.0 -
2 Mac Hardy Line 59 64 59 +5 0.0
3 Stevie Gee 61 65 61 +4 0.0 -
4 Masterbling 58 74 53 +21 2.5 -
5 Space Cowboy 70 67 65 +2 2.5 -
6 Cannatonic 56 48 51 -3 2.5 -
7 Purple Powahouse 63 55 60 -5 0.0 -
8 Get Carter 48 46 50 -4 0.0 -
9 Victor Rail 61 61 61 ✓ Match 0.0 -
10 Granddaddy Purple 52 50 42 +8 2.5 -
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