Official NHA Assessment

Race 4: TAB TELEBET 0861 000 822 PINNACLE STAKES (Open)

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Line Horse
Second Base
Reference for assessment
Exact Matches
0 / 8
Calculated = Official
Close Matches
0 / 8
Within 2 points
Significant Diffs
7 / 8
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    Red Saxon            3    58.0    1    0.00     7.0   114   102          102   -12
2    Castletown           3    54.0    2    1.25     7.0   104   98           98    -6
3    Second Base          4    58.0    3    1.30     3.5   112   112          112   +0
4    Perfect Witness      3    50.5    4    1.50     7.0   104   90           94    -10
5    ExpressFromTheUS     5    50.0    5    2.25     0.0   95    103          103   +8
6    Imperial Ruby        5    56.0    6    5.50     0.0   107   112          112   +5
7    Sovereign Spirit     6    56.0    7    5.75     0.0   108   112          112   +4
99   Astrix               5    62.0    99   0.00     0.0   -     124          124   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Red Saxon 114 116 102 +14 7.0 -
2 Castletown 104 90 98 -8 7.0 -
3 Second Base Line 112 99 112 -13 3.5
4 Perfect Witness 104 105 94 +11 7.0 -
5 ExpressFromTheUS 95 98 103 -5 0.0 -
6 Imperial Ruby 107 105 112 -7 0.0 -
7 Sovereign Spirit 108 106 112 -6 0.0 -
99 Astrix - 118 124 -6 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