The New Sudoku Players' Forum

[yzfwsf]

Hi yzfwsf,

Well, it's off topic, I see two BUG+1 moves in your "All possible steps". The "Bivalue Universal Grave + 1: => r3c1 <> 7" is wrong.

BTW, the full form of BUG is "Bivalue Universal Grave". Either it should be 7r3c1 or r3c1<>59.

R. Jamil

Thanks
When I optimize the code, a clerical error results in a text prompt error, and I mistakenly write an equal sign as an unequal sign.
Since the execution result is not affected, it is not found by the self check of the solver.

bugOne.png (32.76 KiB) Viewed 655 times

[denis_berthier]

A mere finned X-Wing does the businesss:

Hidden Text: Show

finned-x-wing-in-rows: n7{r6 r2}{c1 c8} ==> r1c8 ≠ 7
stte

[Hajime]

A mere finned X-Wing does the businesss:

And it can be solved using a tedious XYchain, see topic "XY chain problem"