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Tough Sudoku for 13/April/2016

                 
                 
                 
                 
                 
                 
                 
                 
                 

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

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Sudoku Solving Techniques

Submitted by: sudoku lover

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Cheers to you, Robin!
13/Apr/16 1:48 AM
1. Unique possibilities to 26.
2. Whether d5=4;OR d3=4=e6,f69=57,d45=27;f5=3.UP37.
3. Whether f9=5,f6=2;OR f9=7,h9=2;h6=4.UP81.
13/Apr/16 2:39 AM
Standard techniques UP 26
//SF (3)@dfi258 =>-3d137, -3f37, -3i7 UP 27
1. XY-wing (7=5)f9-(5=2)f6-(2=7)d4 =>-7d7, -7f5 UP 37
2. (5=7)f9-(7=2)h9-h6=(2)f6 =>-5f6 UP 81
13/Apr/16 2:44 AM
Good for you, Robin.
13/Apr/16 4:26 AM
Unique possibilities to 27.
13/Apr/16 7:24 AM
#26 5@ef6=>e4<>5 #27 3@beh137=>d137f7<>3
#28 3?@e7=>d5=3=>d3=4=>e3=1=>e1={}=>e7<>3 #34 15@i35=>i35<>9=>9@i78=>g8<>9 #38 7?@g7=>[h1=7=>i3=1&g5=2=>f6=2=>f2=9]=>f3={}=>g7<>7 VHBC to #81
V:Only More...
13/Apr/16 7:25 AM
I must have stuffed up somewhere as I had UP to 81
13/Apr/16 2:22 PM
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