Official NHA Assessment

Race 4: RACING240 FOR RACING. FOR YOU MIDDLE STAKES (For horses with nett rating of 101 and below)

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Line Horse
Twin Turbo
Reference for assessment
Exact Matches
2 / 10
Calculated = Official
Close Matches
3 / 10
Within 2 points
Significant Diffs
5 / 10
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    Imperial Master      4    54.0    1    0.00     4.0   89    75           75    -14
2    Bey Suyay            4    58.0    2    0.05     4.0   87    83           83    -4
3    Twin Turbo           4    52.0    3    0.30     4.0   76    76           76    +0
4    Naval Guard          4    60.0    4    1.30     4.0   96    90           90    -6
5    Willow's Wish        4    58.0    5    1.55     4.0   87    86           86    -1
6    Sudden Star          5    60.0    6    2.15     0.0   95    98           98    +3
7    King Arthur          3    50.0    7    2.25     7.0   69    64           64    -5
8    Stormy Winter        8    58.5    8    5.50     0.0   93    92           92    -1
99   Clarkson             4    54.0    99   0.00     4.0   -     75           75    +0
99   Share Holder (AUS)   5    58.0    99   0.00     0.0   -     91           91    +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Imperial Master 89 90 75 +15 4.0 -
2 Bey Suyay 87 84 83 +1 4.0 -
3 Twin Turbo Line 76 88 76 +12 4.0
4 Naval Guard 96 93 90 +3 4.0 -
5 Willow's Wish 87 96 86 +10 4.0 -
6 Sudden Star 95 86 98 -12 0.0 -
7 King Arthur 69 68 64 +4 7.0 -
8 Stormy Winter 93 69 92 -23 0.0 -
99 Clarkson - 75 75 ✓ Match 4.0 -
99 Share Holder (AUS) - 91 91 ✓ 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