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Tough Sudoku for 30/March/2019


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Sudoku Solving Techniques

Submitted by: sudoku lover

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30/Mar/19 12:51 AM
27 Singles
4a6 9(b4 f6) 5fb5 => 4(b5 a7 e1 h2 g6)
9(a6 b3) 3b1 1c1 2c2 6b2 5a2 78df2 0f1 => 5a6 solve
30/Mar/19 1:36 AM
Basics to 26
1. (4=5)b5-f5=(5-9)f6=(9)a6 =>-4a6; basics to 31
2. UR(13)bf13 using mixed internal-externals
(913)bef3==(1|3)e3 =>-28e3; singles to 81
30/Mar/19 3:54 AM
Now, those clouds I recognize! Ian.
30/Mar/19 4:10 AM
Basics to 26
1.X-chain x=4 =>[h6,h7]<>4 if a6=9 => UR 15 fh56
=> b4=f6=9 solve
30/Mar/19 5:29 AM
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