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Tough Sudoku for 29/July/2013

                 
                 
                 
                 
                 
                 
                 
                 
                 

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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#1. 1a1=(1-7)b1=7b4-7a4=(7-8)e4=(8-2)e2=2f1 :=> a2=2
#2. 7e7=(7#-5)e4=(5-4)e3=(4-1)f3=(1-8)f5=8f4-(87#=3)a4-3a7=3d7 :=> -5f45,e7=7
Or
#2. 5d9=5f89-(5=8)f4-8a4=WWing(37)a4.bd5.d7-3a7=3d7 :=> d7=3
29/Jul/13 1:16 AM
Standard techniques UP 29
1. Kraken row (3)adi7 =>SIS 7b1=7i3 =>a3<>7 UP 81
||(3)a7-(37=8)a34-ef4=(8-1)f5=(1-4)f3=e3-(4=7)e7-d7=(7)b1
||(3-7)d7=d5-b5=(7)b1
||(3)i7-(3=7)i 3
29/Jul/13 3:59 AM
(28) 49@de6=>d6<>5 145@def=>d12<>145=>69@d12=>d6<>9
(30) d5=1=>[d3=5&d7=7=>e7=4]=>e3={}=>d5<>1
(32) 45@df3=>[a4<>5&i3<>5]
a6=6=>[c6=5=>c1=8=>b5=8=>a4=7&c8=6=>c2= More...
29/Jul/13 8:15 AM
1. Note e2/f1=28.Unique possibilities to 29.
2. Whether b5=7,e473=745;OR d5=7=b1,a1=1,a2=2;d3=1&e2=8.UP81.
29/Jul/13 12:19 PM
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