Official NHA Assessment

Race 6: WSB GRAND HERITAGE 21 DECEMBER PINNACLE STAKES (Open)

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Line Horse
Dyce
Reference for assessment
Exact Matches
1 / 8
Calculated = Official
Close Matches
3 / 8
Within 2 points
Significant Diffs
5 / 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    Golden Sickle        4    58.5    1    0.00     7.0   121   107          107   -14
2    Dyce                 6    62.0    2    0.10     0.0   128   128          128   +0
3    Magic Tattoo         5    52.0    3    3.10     0.0   105   108          108   +3
4    Time Fo Orchids      5    53.0    4    6.10     0.0   110   110          110   +0
5    Simply Majestic      3    50.0    5    6.80     6.0   102   92           92    -10
6    Mover And Shaker     5    60.0    6    8.00     0.0   118   124          124   +6
7    I Am Giant           2    60.0    7    8.50     4.0   118   116          116   -2
99   Rulership            2    60.0    99   0.00     4.0   -     116          116   +0
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Golden Sickle 121 121 107 +14 7.0 -
2 Dyce Line 128 128 128 ✓ Match 0.0
3 Magic Tattoo 105 93 108 -15 0.0 -
4 Time Fo Orchids 110 109 110 -1 0.0 -
5 Simply Majestic 102 85 92 -7 6.0 -
6 Mover And Shaker 118 109 124 -15 0.0 -
7 I Am Giant 118 124 116 +8 4.0 -
99 Rulership - 118 116 +2 4.0 -
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