Official NHA Assessment

Race 5: INDEPENDENT ON SATURDAY DRILL HALL STAKES (Grade 2) (Horses at Weight-For-Age + Penalties)

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Line Horse
Gladatorian
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
1 / 10
Within 2 points
Significant Diffs
8 / 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    Royal Aussie         2    58.5    1    0.00     0.0   124   112          112   -12
2    Cousin Casey         2    58.5    2    0.25     0.0   123   112          113   -10
3    Gladatorian          5    60.0    3    0.55     0.0   120   120          120   +0
4    Gimmeanotherchance   4    56.5    4    1.55     0.5   111   110          110   -1
5    Al Muthana (AUS)     4    58.5    5    2.65     0.5   125   113          115   -10
6    Humdinger            3    57.5    6    3.25     1.5   116   109          109   -7
7    Archimides           3    58.5    7    9.65     1.5   70    109          109   +39
8    Waterberry Lane      6    58.5    8    16.95    0.0   112   112          112   +0
99   Main Defender        4    59.5    99   0.00     0.5   -     113          113   +0
99   Texas Red            5    58.5    99   0.00     0.0   -     112          112   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Royal Aussie 124 120 112 +8 0.0 -
2 Cousin Casey 123 125 113 +12 0.0 -
3 Gladatorian Line 120 127 120 +7 0.0
4 Gimmeanotherchance 111 96 110 -14 0.5 -
5 Al Muthana (AUS) 125 114 115 -1 0.5 -
6 Humdinger 116 119 109 +10 1.5 -
7 Archimides 70 70 109 -39 1.5 -
8 Waterberry Lane 112 108 112 -4 0.0 -
99 Main Defender - 130 113 +17 0.5 -
99 Texas Red - 119 112 +7 0.0 -
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