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Tough Sudoku for 26/August/2019

                 
                 
                 
                 
                 
                 
                 
                 
                 

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Submitted by: Gath

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Beautiful Queen Anne's Lace!
26/Aug/19 2:05 AM
(S.E. 8.9) Basics to 27
1. Kraken (2)g279 =>-46ab9, -6h9, -6ef8, -46f7, -8f7*, -2f7#, -2a9#
||(2)g2-i1=c1-(2=8)c7*-gh9-(8=246)def9
||(2)g7-(2=8)c7*-gh7=gh9-(8=246)def9
||(2)g9-(2=846) def9*
#Note the subchain (2=8)c7-gh9-(8=246)def9 =>-2f7, -2a9
---------------------
2. More...
26/Aug/19 8:43 AM
1. Kraken row (2)ac8|f8|i8 => -156f8 => HP(15)e8.f7
|| (2)ac8 - (2=8)c7 - c8 = (8)f8
|| (2)f8
|| (2)i8 - i1 = c1 - (2=8)c7 - c8 = (8)f8
2. (1): f456 = f7 - h7 = h6 - i4 = def4 => -1d56
3. (1=564)f741 - (4=156)e248 - (6=51)f47 => -1f56 ; UP = 29
4. (2)d8 = (2-3)d5 = (3-9)c5 = (9)c8 - i8 = (9-6)i3 = (6*)d3 - (6=54)df1 - (4)e2 = (4)e9 =>-6*4d8 ; UP=81
26/Aug/19 4:51 PM
correction, step 4: 'd8' should read 'd9'
4. (2)d9 = (2-3)d5 = (3-9)c5 = (9)c8 - i8 = (9-6)i3 = (6*)d3 - (6=54)df1 - (4)e2 = (4)e9 =>-6*4d9 ; UP=81
26/Aug/19 4:58 PM
Basics to 27
1.if a2=3 OR b2=3 => c1=2 c7=f8=8 c8=h9=9 c5=3
if a2=3 => b9=3 b7=7 box3<>7
if b2=3 a5=0 OR UR 26 ai78=> c1=3 basics to 35
2.if e2=4 => g3=i5=f9=a7=4 g5==i7=b9=7
b7=f9=d5=0 => e9=4 basics to 49
3. X-chain x=1 =>[a6,b3,d5,h7,i4] <>1
=> i4=3 g6=1 .. solve
26/Aug/19 11:42 PM
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