Official NHA Assessment

Race 6: TAB EMPRESS CLUB STAKES (Grade 1) (For Fillies and Mares at Weight-for-Age)

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Line Horse
Callmegetrix
Reference for assessment
Exact Matches
2 / 10
Calculated = Official
Close Matches
7 / 10
Within 2 points
Significant Diffs
3 / 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    Double Grand Slam    2    60.0    1    0.00     0.0   122   115          115   -7
2    Minogue              4    60.0    2    5.40     1.0   112   113          113   +1
3    Callmegetrix         4    60.0    3    5.80     1.0   113   113          113   +0
4    Kisshoten            3    60.0    4    7.30     2.5   107   110          110   +3
5    Rainbow Lorikeet     2    60.0    5    7.50     0.0   115   115          115   +0
6    Golden Palm          2    57.5    6    10.00    0.0   115   110          110   -5
7    Scarlett Heart       2    57.5    7    10.50    0.0   108   110          110   +2
8    Rodeo Drive          2    60.0    8    12.70    0.0   113   115          115   +2
9    Past Is Prologue     3    60.0    9    18.70    2.5   81    110          110   +29
10   Famous Lady          3    60.0    10   35.00    2.5   103   110          110   +7
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Double Grand Slam 122 125 115 +10 0.0 -
2 Minogue 112 114 113 +1 1.0 -
3 Callmegetrix Line 113 113 113 ✓ Match 1.0
4 Kisshoten 107 109 110 -1 2.5 -
5 Rainbow Lorikeet 115 115 115 ✓ Match 0.0 -
6 Golden Palm 115 112 110 +2 0.0 -
7 Scarlett Heart 108 108 110 -2 0.0 -
8 Rodeo Drive 113 113 115 -2 0.0 -
9 Past Is Prologue 81 81 110 -29 2.5 -
10 Famous Lady 103 103 110 -7 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