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Tough Sudoku for 16/March/2015

                 
                 
                 
                 
                 
                 
                 
                 
                 

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

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Submitted by: Gath

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A pretty flower. Does it have a perfume?
16/Mar/15 12:26 AM
e2=7 or a2=7, a4=3, g4=1=d5, d4=2=abc6, bc5=46, f1=4 :=> e2=7; UP81
16/Mar/15 1:56 AM
ap from India for beautiful flowers from your garden.
16/Mar/15 3:34 AM
#28 47@f15=>f6<>47 #29 7@hi3=>i1<>7
3?@a2=>{a1=7&e2=7=>[e8=2=>a9=2=>a8=6&f1=4=>i1=6=>g8 =6]}=>a2<>3
VHBC to #81
V:Only cell left in Vertical column for this candidate
H:Only cell left in Horizontal row for this More...
16/Mar/15 7:57 AM
Standard techniques UP 28
1. (1)d5=d4-(1=3)g4-gh5=b5-a4=(3-7)a2=(7-4)e2=(4-2)e6=(2-7)e8=(7)d7 =>-7d5 UP 32
2. (15=4)ab6-e6=(4-7)e2=(7-3)a2=(3-8)a4=(8-5)c4=(5)hi4 =>-5i6 UP 38
3. (1=4)a6-e6=(4-7)e2=(7-3)a2=a4-b5=gh5-(3=1)g4 =>-1gi6 UP 39
4. (4)e6=(4-7)e2=(7-3)a2=(3-48)ac4=(4)h4 =>-4i6 UP 81
16/Mar/15 9:27 AM
Like JC's:
1. Unique possibilities to 28.
2. Whether a2=3,a1=7;OR a4=3,g4=1=d5,d4=2=h5,bc5=46;e5=7.UP81.
16/Mar/15 12:48 PM
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