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Tough Sudoku for 7/May/2019

                 
                 
                 
                 
                 
                 
                 
                 
                 

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Submitted by: Gath

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Basics to 23
1. (1=7)f9 - f1 = g1 - (7)g6 = HP(71)ce6 => -1e7 ; UP = 81
07/May/19 12:18 AM
1. Unique possibilities to 23.
2. Whether e7=7=a5;OR e7=1=c6;g6=7.UP81.
07/May/19 12:51 AM
Basics to 23
1.X-chain x=7 =>[c7,c5,f3,g5,g2]<>7
if e7=1 => e6=0 => e7=c9=a5=f1=i2=g6=7 solve
07/May/19 1:20 AM
Very interesting photo of an ancient work of art.
07/May/19 4:41 AM
19:02.
07/May/19 2:47 PM
@Sarah
see my comment on yesterday's tough page.
07/May/19 6:00 PM
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