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Tough Sudoku for 23/February/2018


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Sudoku Solving Techniques

Submitted by: sudoku lover

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Same photo as yesterday, the same as the kid's pages.
23/Feb/18 12:11 AM
Basics to 31
1. (41=5)e69-f5=f3-(5=4)g3-g45=i45-i7=(4)a7 =>-4b9; basics to 34
2. XY-wing (5=8)i7-(8=6)f7-(6=5)f5 =>-5i5; basics to 64
3. BUG+1 =>c6=7; singles to 81
23/Feb/18 5:20 AM
Ignoring Basics
#32 1?@e9=>d7=6=>f7=8=>45@h8i7=>b9=4=>i7=4=>h1=4=>g3=5=>5@e12=>e6={}=>e9&L T;>1
#65 3?@a3=>a6=7=>g6=5=>a….i3=>a3<>3
23/Feb/18 7:53 AM
e9&L T;>1
23/Feb/18 7:54 AM
Because of the arrangement, I solved this the way I work on Hard, and sure enough it solved itself the way Hards do... until the very end when other thoughts needed to be thunk.
23/Feb/18 4:56 PM
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