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Tough Sudoku for 3/December/2015

                 
                 
                 
                 
                 
                 
                 
                 
                 

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Sudoku Solving Techniques

Submitted by: sudoku lover

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Wonders of nature! Great photo Eileen
03/Dec/15 6:59 AM
UP25; e8=7 -> contradiction; UP81 :

X-Loop(8)[b25,h68,e82]-8c6,f2,g6

3i6=(3-8)h6=8h8-(8=7)e8-(7=5)d7

||5g46-5g1=5def1
||HT(3 45-8)h246==5d7
||(5-6)i4=*[7gi7=(7-6)i8=*(6-3)i6==5d7]-(7=5)d7
||(5-3)i6==5d7 :=> -5g7.d3
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03/Dec/15 7:26 AM
1:08:02
06/Jan/16 8:43 AM
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