Official NHA Assessment

Race 8: TAB 4RACING APP MR 80 HANDICAP (Open)

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Line Horse
Twice As Splendid
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
2 / 8
Within 2 points
Significant Diffs
4 / 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    Samuel Salt          3    56.0    1    0.00     2.0   74    74           74    +0
2    Who's That Star      3    55.5    2    1.10     2.0   73    73           73    +0
3    Twice As Splendid    3    61.0    3    1.75     2.0   84    84           84    +0
4    Irfaans Boy          3    59.5    4    3.00     2.0   89    81           81    -8
5    Double Magic         3    59.0    5    3.50     2.0   80    80           80    +0
6    Stormy Seas          4    59.0    6    7.00     2.5   78    79           79    +1
99   Time Silhouette      3    54.5    99   0.00     2.0   -     71           71    +0
99   Dronfield            3    56.5    99   0.00     2.0   -     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 Samuel Salt 74 82 74 +8 2.0 -
2 Who's That Star 73 68 73 -5 2.0 -
3 Twice As Splendid Line 84 81 84 -3 2.0
4 Irfaans Boy 89 90 81 +9 2.0 -
5 Double Magic 80 72 80 -8 2.0 -
6 Stormy Seas 78 77 79 -2 2.5 -
99 Time Silhouette - 56 71 -15 2.0 -
99 Dronfield - 75 75 ✓ Match 2.0 -
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