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Tough Sudoku for 19/September/2014


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Sudoku Solving Techniques

Submitted by: sudoku lover

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Looks like it would sway a bit in a strong wind!
19/Sep/14 12:06 AM
Y-8 : Symmetry=AntiDiagonal, Start=27, SSTS=29, SG=32.25, SE=9.0

a needed challenger today, site puzzle is beginner level, SG thought this one very tough, I give it ** level.
19/Sep/14 3:05 AM
Path to Y-8, 2 krakens, 3 AICs
Standard techniques UP29
1. Kraken row (7)fgi9 =>i9<>8
2. Kraken row (4)abdegh4 =>f9<>8 UP More...
19/Sep/14 8:01 AM
7?@f4=>f1=2=>{f5=5&h6=2=>e4=2=>i4=3=>[i More...
19/Sep/14 8:21 AM
1. Unique possibilities to 25.
2. Whether h6=2;OR h1=2=e3;e6=3.UP41.
3. Whether c3=1,a3=8;OR b3=1,b8=9;a4=9.UP46.
4. Whether c6=6=b1;OR c6=4,c7=9,b8=1;b3=3.UP52.
5. Whether f8=1,b81=96;OR f2=1,i2=7=c1;c1<>6.
6. Whether c7=4,c6=6;OR e7=4,e5=6;b1=6.UP81.
19/Sep/14 9:04 AM
19/Sep/14 11:30 AM
XW(2f14,2h16)-2e6g4; UP52
XW(9cd2,9ce7)-9d89e1; UP53
SW(19)b8,f8e9,ce7-9e9; UP81
19/Sep/14 5:05 PM
It certainly does sway Sheila!!
19/Sep/14 6:36 PM
As JC seems to point out, my step 2 should reach UP52, and steps 3 and 4 were not necessary.
19/Sep/14 6:57 PM
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