Official NHA Assessment

Race 4: BETWAY PINNACLE STAKES (Open)

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Line Horse
William Robertson
Reference for assessment
Exact Matches
0 / 7
Calculated = Official
Close Matches
0 / 7
Within 2 points
Significant Diffs
4 / 7
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    Buffalo Storm Cody   3    62.0    1    0.00     7.5   127   115          115   -12
2    William Robertson    6    60.5    2    2.25     0.0   127   127          127   +0
3    Fire 'N Flames       4    52.0    3    2.75     9.0   105   92           95    -10
4    Greaterix            3    58.0    4    7.55     7.5   117   107          107   -10
5    Red Bomber           2    50.0    5    8.55     5.0   94    96           96    +2
6    Dantonfromsandton    3    54.0    6    10.25    7.5   108   99           99    -9
7    Chyavana             3    52.5    7    10.30    7.5   107   96           97    -10
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Buffalo Storm Cody 127 132 115 +17 7.5 -
2 William Robertson Line 127 124 127 -3 0.0
3 Fire 'N Flames 105 103 95 +8 9.0 -
4 Greaterix 117 110 107 +3 7.5 -
5 Red Bomber 94 86 96 -10 5.0 -
6 Dantonfromsandton 108 96 99 -3 7.5 -
7 Chyavana 107 106 97 +9 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