Official NHA Assessment

Race 6: RACEHORSE OWNERS ASSOCIATION PINNACLE STAKES (Open to all horses)

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Line Horse
William Robertson
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
1 / 9
Within 2 points
Significant Diffs
7 / 9
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    Vars Vicky           4    54.0    1    0.00     0.0   106   108          108   +2
2    Bartholdi            4    56.0    2    0.40     0.0   107   112          112   +5
3    Mardi Gras           7    52.5    3    2.40     0.0   102   105          105   +3
4    William Robertson    6    52.0    4    2.50     0.0   104   104          104   +0
5    Eden Roc             5    58.0    5    4.25     0.0   114   116          116   +2
6    Warrior's Rest       7    58.0    6    5.00     0.0   112   116          116   +4
7    Captain Oupie        4    54.0    7    8.00     0.0   104   108          108   +4
8    Whorly Whorly        7    54.5    8    8.25     0.0   102   109          109   +7
99   Mr Flood             6    60.0    99   0.00     0.0   -     120          120   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Vars Vicky 106 116 108 +8 0.0 -
2 Bartholdi 107 117 112 +5 0.0 -
3 Mardi Gras 102 83 105 -22 0.0 -
4 William Robertson Line 104 124 104 +20 0.0
5 Eden Roc 114 98 116 -18 0.0 -
6 Warrior's Rest 112 101 116 -15 0.0 -
7 Captain Oupie 104 94 108 -14 0.0 -
8 Whorly Whorly 102 78 109 -31 0.0 -
99 Mr Flood - 120 120 ✓ Match 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