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Tough Sudoku for 5/June/2015

                 
                 
                 
                 
                 
                 
                 
                 
                 

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

  1 2 3 4 5 6 7 8 9
Check out the latest post in the Sudoku Forum

Sudoku Solving Techniques

Submitted by: sudoku lover

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There's some history there.
05/Jun/15 12:07 AM
(2)[b4=b21-c3=d3-e12=e4]-2c124,di4; UP35
[2e4=2e21-(2=4)d3-4f3=4f4]-(4=2)e4; UP81
05/Jun/15 12:49 AM
As above:
1)(2):c3=d3-e12=e4,=>c4<>2
2)(4)e9=d97-(4=2)d3-e12=e4,=>e4<>4.UP=81



05/Jun/15 12:59 AM
SE=7.1 UP to 29
1)Branched ext. S-Wing:(2=4)d3-e12=(2)e4=(9)c4 or (4)d3-[f23=(4)f4],and=(2)c3 =e4<>4,c4<>2 UP=81
05/Jun/15 1:09 AM
Anyone who lives there must be very fit with all that climbing to do.
05/Jun/15 2:16 AM
#29 257@b124=>b9<>7
#30 5@d89=>d3<>5 7@e12=>e4<>7
4?@d3=>[c3=2=>b4=2=>c4=9 & f4=4]=>e4={}=>d3<>4
VHBC to #81
V:Only cell left in Vertical column for this candidate
H:Only cell left in Horizontal More...
05/Jun/15 6:57 AM
1. Note b124=257.Unique possibilities to 29.
2. Whether d3=2;OR d3=4=e89,c34=29;e4=4.UP81.
05/Jun/15 7:21 AM
Should read e4=2.
05/Jun/15 7:22 AM
Standard techniques UP 29
1. (2)d3=c3-b12=b4-(249=6)cef4-(4)f4=(4)f23 =>-4d3 UP 81
05/Jun/15 7:38 AM
An English variation of cenoman's path:

1. Whether e4=4=d789;OR e4=29=c4,b12=2;d3=2.UP81.
05/Jun/15 10:48 AM
54:58
09/Jun/15 7:33 AM
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