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Tough Sudoku for 6/October/2016

                 
                 
                 
                 
                 
                 
                 
                 
                 

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Sudoku Solving Techniques

Submitted by: sudoku lover

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Posted a kraken solution to yesterdays..
06/Oct/16 12:34 AM
1. Note g34=25.Unique possibilities to 43.
2. Locked 9s @ ac19.So ac5<>9.
Making use of the 149 Unresolvable Rectangle @ ac159:
3. Whether b2=5,b8=7;OR i2=5=g4=de5;c5=7 or else UR.UP53.
4. Whether b4=9,d4=5;OR b6=9,h6=5;g4=2.UP81.

Welcome back pj!
06/Oct/16 1:00 AM
Great picture, Kate.
06/Oct/16 2:01 AM
Interesting plant, Kate. It looks like it has veins, with blood flowing through them.
06/Oct/16 5:11 AM
#27 25@g34=>g5<>25 #42 19@ac1=>d1<>1 #44 49@ac9=>c9<>7 19@ac1=>bi1<>9 9@ac19=>c6<>9
1?@i7=>f7=7=>c7=5=>{d7=2=>e9=5=>e8=1=>h8=5,c5=7=&G T;e5=2,c6=1=>h6=9=>i5=5=>b2=3}=>b6={}=>i7<>1
VHBC to More...
06/Oct/16 6:56 AM
#27 25@g34=>g5<>25#42 19@ac1=>d1<>1 #44 49@ac9=>c9<>7 19@ac1=>bi1<>9 9@ac19=>c6<>9
1?@i7=>f7=7=>c7=5=>{d7=2=>e9=5=>e8=1=>h8=5,c5=7=&G T;e5=2,c6=1=>h6=9=>i5=5=>b2=3}=>b6={}=>i7<>1
VHBC to More...
06/Oct/16 7:01 AM
Standard techniques up 43
1. (5)c7=b8-b2=i2-g3=g4-de4=de5-(547=1)acf5-i5=i7-(1=7)f7-c7=(7)c5 =>-7c7 up 52
2. (7=1)i7-h8=(1-2)h4=(2)h9 =>-7h9 up 81

Note that Alfred's UR (149)@ac159 shortens my chain #1, as it provides the derived SIS 5ac5==7c5
06/Oct/16 9:01 AM
24:47
10/Oct/16 4:45 AM
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