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Tough Sudoku for 6/March/2019

                 
                 
                 
                 
                 
                 
                 
                 
                 

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Sudoku Solving Techniques

Submitted by: sudoku lover

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Basics to 27
1.X-chain x=7 => i7<>7 if i8=1=> i7=2 g9=6 e79=18
=> b9=a9=5 => i8=7 Basics to 42
2. XY-wing 158 [b1,c3,g3]=> [a3,h1,i1]<>1
=>a9=1 solve
06/Mar/19 3:39 AM
Love this picture!
06/Mar/19 5:03 AM
Hi Charlie! You sure are one cute cat, looking out over the pretty flowers. I love this photo too!
06/Mar/19 5:23 AM
As Serbian
Singles to 27
7a8 7g7 6g9 6b8 6c6 7a5 => 7c7 up 38
Wether 6b79 (6c6 9a4 9h6 7g6) or 6bc9 (6g8) => 7i8 up 42
If 1g89 1i1 8g3 5e3 0c3 => 1i7
Nice cat, thx...
06/Mar/19 6:18 AM
First step should read : => a8 = 3
06/Mar/19 7:27 AM
Basics to 27
1. (7=1)i8-(1356=2)df7.ef8-(2=17)i78 =>-7g78; basics to 42
2. Kraken column (2)a234 =>-8ac2; singles to 81
||(29)ac2
||(2)a3-(25=8)ce3
||(2)a4-b5=(2-8)i5=(8)i2
06/Mar/19 9:06 AM
SE=7.6
Basics to UP=27
1)(7=1)i8-(1=18)e879-(2)e9=g9-(2=17)i78,=>g78<>7
2)(5=8)c3-g3=(8-5)i2=(5)i1,=>b1 <>5
3)(2):i5=i2-h1=b1,=>b5<>2.UP=81
06/Mar/19 7:22 PM
40:29
06/Mar/19 11:34 PM
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