The New Sudoku Players' Forum

[carlos]

i have this sudoku:

xxx|2xx|x8x
x8x|x31|xx7
xx1|x8x|xx9

xx4|7xx|xxx
x52|xxx|84|
xxx|xx2|3xx

5xx|x6x|4XX
5xx|x6x|4xx
x6x|xx3|xxx

and i went all the way up to here:

3(79)(5679)|2(59)(5679)|184
(469)8(569)|(469)31 |(56)27
2(47)1 |(46)8(4567)|(56)39

(68)34 |7(15)(568)|(29)(19)(126)
752 |3(19)(69) |84(16)
(689)1(689|(68)42 |375

5((279)(3789)|(189)6(89)|4(19)(1238)
1(249)(3789) |57(489) |(29)6(238)
(489)6(89) |(1489)23 |75(18)

i don't see how i can reduce any more canditates
how do i move on?
i have the solution but i would like to know how to carry on.

thanks

carlos

[angusj]

i have this sudoku

Well, it has multiple solutions so would generally be regarded as an invalid puzzle.

[QBasicMac]

There were some inconsistencies in your two versions of the puzzle, which I hope I resolved.

Starting over, I got to this place
Solution So Far

Code: Select all

3-- 2-- 184
-8- -31 -27
2-1 -8- -39
-34 7-- ---
752 3-- 84-
-1- -42 375
5-- -6- 4--
1-- 57- -6-
-6- -23 75-


Pencilmarks So Far

Code: Select all

-         79        5679      -         59        5679      -         -         -       
469       -         569       469       -         -         56        -         -       
-         47        -         46        -         4567      56        -         -       
68        -         -         -         15        568       29        19        126     
-         -         -         -         19        69        -         -         16       
689       -         689       68        -         -         -         -         -       
-         279       3789      189       -         89        -         19        1238     
-         249       389       -         -         489       29        -         238     
489       -         89        1489      -         -         -         -         18       


where there is an X-Wing on 4's at r3c26-r8c26
Thus you can remove the 4 at r3c4

Mac

[teddy]

As my understanding , only one resolution this puzzle has.

3xx 2xx 184
x8x x31 x27
2x1 x8x x39

x34 7xx xxx
752 3xx 84x
x1x x42 375

5xx x6x 4xx
1xx 57x x6x
x6x x23 75x

As ur last version above, I try the last line X6X X23 75X twice.
one is x6x 123 75x, and the other is x6x x23 751.
I get the resolution under second's one as below . And the first one is failed.

376 295 184
985 431 627
241 687 539

834 756 912
752 319 846
619 842 375

527 168 493
193 574 268
468 923 751

[QBasicMac]

376 295 184
985 431 627
241 687 539

834 756 912
752 319 846
619 842 375

527 168 493
193 574 268
468 923 751

Yes, that is the solution I got after the X-Wing described above.

Mac