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Tough Sudoku for 26/December/2018

                 
                 
                 
                 
                 
                 
                 
                 
                 

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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Basics to 28
1. if d7=2 OR g7=2 => h6=6 c7=6 => [a6c6c4]<>6
=> d8=2 Bassics to 31
2.W-wing 26 [c7,h6] =>c6<>2 W-wing 26 [h6,i2]
=> [g2,i4]<>6 => h6=6 Basics to 46
3.XY wing 278 [a6,g6,h5] => a5<>7=> a5=9 solve
26/Dec/18 2:35 AM
ah. A sunny smile for a gloomy day.
26/Dec/18 4:52 AM
Basics to 28
1. (2=6)c7-c4=i4-h6=(6-1)h2=h9-g7=(1)d7 =>-2d7; basics to 31
2. (9=1)f9-h9=(1-6)h2=h6-i4=(6-5)c4=c6-(5=49)df6 =>-9f4
3. (3=1)f4-f9=h9-g7=(1-8)g1=(8-6)i1=e1-(6=3)e8 =>-3f8; basics to 38
4. (1)h2=h9-(1=9)f9-i9=(9-6)i4=(6)h6 =>-6h2; basics to 49
5. (7=2)a6-(2=8)g6-(8=7)h5 =>-7a5; singles to 81
26/Dec/18 7:57 AM
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