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Tough Sudoku for 23/December/2014

                 
                 
                 
                 
                 
                 
                 
                 
                 

Choose a number, and place it in the grid above.

  1 2 3 4 5 6 7 8 9
Check out the latest post in the Sudoku Forum

Sudoku Solving Techniques

Submitted by: sudoku lover

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everybody!

23/Dec/14 12:26 AM
SE=7.2 UP to 28
1)2-chain logic:(3=6)-h4=(3)h3=(7)c3 or (6)f4-a4=(6)a1 => c3<>6,a1<>7 Up=81
23/Dec/14 2:01 AM
solutions for Q-10 and Q-11 using very mild pattern SIS; in both an als is strong with a turbot due to
the placement of the extra digit .. cf. SS(4)gf6*.fh3=(257)efg6 in Q-10 and SS(7)ei8*.g91=(3568)dehi8 in Q-11
===============================================
Q-10; taking some patterns More...
23/Dec/14 2:41 AM
#27 7@i56=>i2<>7
#29 36@f46=>f4<>19
7?@a1=>[a4=6&h3=7=>h4=3]=>f4={}=>a1<>7
V HBC to #81
V:Only cell left in Vertical column for this candidate
H:Only cell left in Horizontal row for this More...
23/Dec/14 6:47 AM
Another one with no tourists!
23/Dec/14 1:28 PM
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