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Tough Sudoku for 12/November/2014

                 
                 
                 
                 
                 
                 
                 
                 
                 

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

  1 2 3 4 5 6 7 8 9
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Submitted by: Gath

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What a glorious spot of color, Kate!
12/Nov/14 1:36 AM
UP31; 6a9==(7-3)c9=(3-4)c1=*[(9=4)e3-4c3=*4c5-(4=82)a56-2g6=(2-9)g7=9h7]-(9=6)h3-6f3==1f9 :=> -1a9; UP81
12/Nov/14 3:35 AM

SE=7.3
SSTS
1)(4=1)c3-(12=8)ib3-f3=(8-3)f8=(3-2)f2=f9-(2=83)hi9-c9=(3)c1,=>c1<>4.UP=81
12/Nov/14 3:45 AM
Hi Sotir, I got 1a79 => +2g7, +3c1, UP81; therefore, you still need one more step !
Best Regards, JC.
12/Nov/14 4:23 AM
Oops ... +2g6, +3c1, UP8; ...
12/Nov/14 4:24 AM
Thanks JC, missed one step:
SE=7.3
SSTS
1)(2)a1=a6-g6=(2-9)g7=g1-(9=4)e1,=>a1<>4
2)(4=1)c3-(12=8)ib3-f3=(8-3) f8=(3-2)f2=f9-(2=83)hi9-c9=(3)c1,=>c1<>4.UP=81

Best Regards, Sotir
12/Nov/14 4:38 AM
#28 7@bc9=>e9<>7
#29 12@d7f9=>38@df8=>i8<>38
#30 12@i13=>i4<>2
#32 12@i13=>i9h3<>2 2@df2=>f3<>2
2?@b3=>[f3=8=>f8=3&h4=2=>f9=2]=>f2={}=>b3<>2
#34 More...
12/Nov/14 10:19 AM
1. Note d7f9=12.Unique possibilities to 31.
2. Whether f8=8,f3=6,h3=9;OR f8=3=d2,d7=2;g7=9.UP37.
3, Whether d2=3,d8=8;OR d2=2=h7,b7=3;b1=8.UP81.
12/Nov/14 2:43 PM
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