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Tough Sudoku for 15/October/2019

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serban From cluj
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Basics to 32
1.X-chain x=3 =>[c1,e9,e1,g1]<>3 =>e1=5
basics to 51
2. XY-wing 238 [g8,i7,g1]=>[g2,i9]<>3
=> g2=i9=4 solve

15/Oct/19 1:05 AM

Alfred From Sydney Supporting Member
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1. Unique possibilities to 32.Note locked 6s @ af19.So e19,g9<>6.
2. Whether i1=3;OR i9=3=e8;e1=5.UP49.
3. Whether g6=2=i1;OR g6=8;i7=8.UP81.

15/Oct/19 2:20 AM

Cenoman From France
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Basics to 32
1. XY-wing (3=8)g8-(8=2)i7-(2=3)i1 =>-3i9, -3g12; basics to 81

15/Oct/19 2:51 AM

Jackie From Canada
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Lovely night photo made for a fun jigsaw.

15/Oct/19 4:49 AM

Alfred From Sydney Supporting Member
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Hi Cenoman. Should your last term not be -(2=34)i1 ? Can't i1 also be 4?

Best Regards, Alfred.

15/Oct/19 8:22 AM

Cenoman From France
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Hi Alfred,
In basics, I note eg8=38, dg6=28, g579=679 Then g12=234 with 4 locked in g12, thus i1=23

Best regards, Cenoman

15/Oct/19 9:23 AM

Alfred From Sydney Supporting Member
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Thanks Cenoman. I missed the 2348 quad in column g.
Best Regards, Alfred.

15/Oct/19 5:59 PM

tom From vancouver Supporting Member
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12:33.

15/Oct/19 7:39 PM

Nick From Toronto
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25:43

15/Oct/19 10:57 PM

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