Official NHA Assessment

Race 4: TAB TELEBET 0861 000 822 MR 80 HANDICAP (Open)

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Line Horse
In Cahoots
Reference for assessment
Exact Matches
1 / 9
Calculated = Official
Close Matches
2 / 9
Within 2 points
Significant Diffs
4 / 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    Corvette Captain     5    53.5    1    0.00     0.0   67    67           67    +0
2    Vegas Hi Rise        6    56.5    2    1.10     0.0   80    73           73    -7
3    In Cahoots           6    58.0    3    1.40     0.0   76    76           76    +0
4    Excellarator         3    54.0    4    1.90     5.0   75    58           65    -10
5    Samuel Salt          3    56.5    5    3.60     5.0   80    63           70    -10
6    Phinda Mzala         4    59.0    6    4.00     6.0   78    66           68    -10
7    Rock Of Africa       8    60.5    7    4.60     0.0   81    81           81    +0
8    South Boy (ARG)      4    58.0    8    9.60     6.0   76    64           66    -10
9    August Rain          5    57.5    9    11.20    0.0   75    75           75    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Corvette Captain 67 75 67 +8 0.0 -
2 Vegas Hi Rise 80 71 73 -2 0.0 -
3 In Cahoots Line 76 54 76 -22 0.0
4 Excellarator 75 60 65 -5 5.0 -
5 Samuel Salt 80 82 70 +12 5.0 -
6 Phinda Mzala 78 54 68 -14 6.0 -
7 Rock Of Africa 81 78 81 -3 0.0 -
8 South Boy (ARG) 76 71 66 +5 6.0 -
9 August Rain 75 75 75 ✓ 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