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Tough Sudoku for 2/March/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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[1b4=1b3-1a1=(1-3)d1=HP(35-2)d69=2f4]-2b1
02/Mar/16 12:52 AM
Typo ... -2b4 instead of -2b1
02/Mar/16 12:54 AM
SE 7.1
#1 SSTS to UP35
(2)df2=UR(69)df28
#2 (3)e5=(3-1)h5=a5-(1=2)b4-(2=6)f4 -> -6e5;UP81
02/Mar/16 2:33 AM
1. Note b89=46,h12=67,b346=129.Unique possibilities to 34.
2. Whether d3=1;OR d238=269,f4=2;b4=1.UP81.
02/Mar/16 4:53 AM
A glacier , I think. It has to be cold to preserve it.
02/Mar/16 5:46 AM
#28 257@ac7a9=>b7<>257 #29 67@h12=>h12<>345 #33 9@df8=>i8<>9
#35 3?@h5=>h4=1=>b4=2=>f4=6=>e5={}=>h5<>3
VHBC to #81
V:Only cell left in Vertical column for this candidate
H:Only cell left in Horizontal row More...
02/Mar/16 8:16 AM
14:24
02/Mar/16 12:41 PM
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