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Tough Sudoku for 20/November/2019

                 
                 
                 
                 
                 
                 
                 
                 
                 

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

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Check out the latest post in the Sudoku Forum

Sudoku Solving Techniques

Submitted by: sudoku lover

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16:14.
20/Nov/19 1:09 AM
Beautiful stormy sky!
20/Nov/19 6:24 AM
30:55
20/Nov/19 8:13 AM
The picture speaks for itself, but I'd be interested to know where it was taken and also who the photographer was.
20/Nov/19 12:09 PM
Basics to 27
1.X-chain x=1 => h6<>1 X-chain x=5 => e8<>5
X-chain x=9 => e1<>9 if h6=6 =>g8=6
g6=i1=e5=1 i2=a5=d4=9
=>X-wing x=1 ab14 => [b7,c7,c8]<>1
a8=1 b7=2 b2=6 b9=5 a9=7 c9=0 =>g6=6 basics to 31
2. if c8=5 => DP 2459 ef2=45 df3=29 df9=59 df5=45
de7=24 OR i2=h4=0 =>d8=b9=5 solve
20/Nov/19 7:15 PM
SE=8.4
Basics to UP=27
1)(1):ih4=cb4-a56=a8-bc7=h7,=>h6<>1
2)(3)bc6=(3-1)e6=e5-(1=3)a5,=>e6=13,ci5<& GT;1,c5bc4<>3
3)(78=8)h984-i5=(8-5)c5=(5-3)b6=a56-(3=7)a9-h9=(7)h8,=>h8=78
4)(38=8)i45h4- More...
21/Nov/19 2:39 AM
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