The New Sudoku Players' Forum

[Kites]

It seems to me that there is more than one posibility for the next move, I find it hard to know what. Can you teach me find the options?

[678]9[4678],[478]12,5[46]3
5[24678]1,3[78][48],[678]9[24678]
[2378]]23478][23478],596,[78][24]1

[12367][23467]9,[467][367][34],[1367]85
[3678][34678][3478],251,9[346][467]
[1367]5[347],[4678][3678]9,2[1346]467]

4[2378][3578],9[2368][38],[1368][12356][268]
[238]1[2358],[68][2368]7,4[2356]9
9[238]6,145,[38]7[28]

[PaulIQ164]

You have a candidate 6 in r1c3 that can't be there (as there's a 6 in r9c3), but it doesn't help much. I put this into Sudoku Susser, which needs Nishio to solve it. In other words, it's really hard. Perhaps someone who understands these ridiculously complex methods can be more helpful.

[Ocean]

It seems to me that there is more than one posibility for the next move, I find it hard to know what. Can you teach me find the options?

[678]9[4678],[478]12,5[46]3
5[24678]1,3[78][48],[678]9[24678]
[2378]]23478][23478],596,[78][24]1

[12367][23467]9,[467][367][34],[1367]85
[3678][34678][3478],251,9[346][467]
[1367]5[347],[4678][3678]9,2[1346]467]

4[2378][3578],9[2368][38],[1368][12356][268]
[238]1[2358],[68][2368]7,4[2356]9
9[238]6,145,[38]7[28]

Have a look at the 2's - there seems to be an 'x-wing' pattern (row 2 and 9) - which means that candidate 2 can be excluded from all cells in column two and nine except those in row 2 and 9.

[Kites]

[quote="Ocean"][quote="Kites"]It seems to me that there is more than one posibility for the next move, I find it hard to know what. Can you teach me find the options?

[678]9[4678],[478]12,5[46]3
5[24678]1,3[78][48],[678]9[24678]
[2378]]23478][23478],596,[78][24]1

[12367][23467]9,[467][367][34],[1367]85
[3678][34678][3478],251,9[346][467]
[1367]5[347],[4678][3678]9,2[1346]467]

4[2378][3578],9[2368][38],[1368][12356][268]
[238]1[2358],[68][2368]7,4[2356]9
9[238]6,145,[38]7[28][/quote]

Have a look at the 2's - there seems to be an 'x-wing' pattern (row 2 and 9) - which means that candidate 2 can be excluded from all cells in column two and nine except those in row 2 and 9.[/quote]

Thank you very much for pointing 'x-wing' - this puzzle is solved now!

[Kites]

[quote="PaulIQ164"]You have a candidate 6 in r1c3 that can't be there (as there's a 6 in r9c3), but it doesn't help much. I put this into Sudoku Susser, which needs Nishio to solve it. In other words, it's really hard. Perhaps someone who understands these ridiculously complex methods can be more helpful.[/quote]

Thanks Paul, you were right about the 6.