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Tough Sudoku for 25/November/2015

                 
                 
                 
                 
                 
                 
                 
                 
                 

Choose a number, and place it in the grid above.

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Submitted by: Gath

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UP29; 2 solutions for the digit 3; c4=3 -> contradiction; UP81 :

5 Singles; c14=36; Swordfish(6g69,6e91,6c14)-6a3,i6; 2 Singles
||1a4-6c1=6c4
||1def4-(1=5)e6-(5=6)e1-6c1=6c4
||1h4-(1=8)h8-8f8=(8-6)e9=6e1-6c1=6c4; Singles to the end.
25/Nov/15 3:05 AM
1. Note c14=36.Unique possibilities to 29.
2. Whether h4=3,def4=5;OR h1=3,c1=6,e1=5;e6=1.UP30.
3. Whether e1=6=c4;OR e9=6=g6;a6<>6.
4. Whether h8=1=a4;OR h8=8=e8,e1=6;c4=6.UP81.
25/Nov/15 4:06 AM
Typo : exclusions of the Swordfish(6) : -6a3,i4
25/Nov/15 4:43 AM
Typo : exclusions of the Swordfish(6) : -6a6,i4
25/Nov/15 4:44 AM
Interesting photo.Must have been a wonderful trip,Eileen.
25/Nov/15 6:20 AM
#28 36@c14=>c1<>2479&c4<>5
#30 5?@e6=>h4=5=>h1=3=>c1=6=>e1={}=>e6<>5
#31 8@ef4=>h4<>8
8?@g7=>{i2=8=>h1=3,h6=9=>h4=5,b3=8=>e9=8}=>e4={}=>g 7<>8
#32 More...
25/Nov/15 9:22 AM
JC: Swordfish(6g69,6e91,6c14)
That is not a correct swordfish, which is why your exclusions were wrong.
25/Nov/15 3:39 PM
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