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Tough Sudoku for 3/July/2014

                 
                 
                 
                 
                 
                 
                 
                 
                 

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Sudoku Solving Techniques

Submitted by: sudoku lover

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Discreetly handled...
03/Jul/14 12:04 AM
X-83: Symmetry=None, Start=25, SSTS=30, SG=12.0, SE=8.9
040002906080050010200000000001000600000008020300060407907301000000600030600090100
03/Jul/14 12:20 AM
X-81 (solved by sotir with 3.75 point path) * level:

1. MW(41)i8/(1)gf7.(4)b7=(9)i8-(359=4)b7c78 # -4b8
2. (5)e8=e4-c4=b45-(5=4)b7-(4=15)e8f7 # -5bdf8
// als-xz: { (5=1246)d89f78-(1379=5)f1235 }; -5f4, -(139)f46
// MW(42)f6/a69.b7; -4f7
3. DP(579)cfh23::(9)a9=b8-b1=*(6)h3-(6=9)g3 # -9g9.c3.gi1
--------------------------------
1 + .75 + .25 + .25 + .75 = 3.0
03/Jul/14 12:25 AM
#1. Basics

5 Singles; UP27
C(1)[e8=f8]-1de7
C(2[a8=b8=c8]-2b9
C(5)[f1=f3]-5d12
XWing(5)[c54=c3-i3=i4])-5b4 *
Kite(6)[a2=e2-f1=f8]-6a8 *
C(8)[g7=g9]-8h79

* : optional

#2. 3i9=HP(23-8)gh9=HP(81-5)g72=5i3 :=> -3i3=3i9; UP28

#3. More...
04/Jul/14 4:50 AM
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