The New Sudoku Players' Forum

[ronk]

(1,6)2 is ruled out as follows:
If (1,6)2 then (456,6)468 and (789,5)2478, but four digits cannot be in three cells.

But if (1,6)2 then (123,5)368 and (789,5)247 ... so I have doubts that your elimination is valid.

(123,5)2368 and (789,5)2478 are doubly-weakly-linked ALSs and share the 2 and the 8. We just don't know which set will hold which. But we do know neither set must hold both ... no matter what happens at (1,6).

Ron

[aeb]

(1,6)2 is ruled out as follows:
If (1,6)2 then (456,6)468 and (789,5)2478, but four digits cannot be in three cells.

But if (1,6)2 then (123,5)368 and (789,5)247 ... so I have doubts that your elimination is valid.

Shame on you. Think about (456,6)468 and where the 8 goes in box 8.

[ronk]

Shame on you. Think about (456,6)468 and where the 8 goes in box 8.

I stand 1/2 corrected. Think about it, you've got the correct result, but the wrong reason.

Ron

[aeb]

Shame on you. Think about (456,6)468 and where the 8 goes in box 8.

I stand 1/2 corrected. Think about it, you've got the correct result, but the wrong reason.
Ron

More shame on you. At least you understand now. Exercise: write this as a nice loop.

[ronk]

More shame on you. At least you understand now. Exercise: write this as a nice loop.

After tacky comments like that, I'll be sure not to post to you again. Please return the courtesy.

Ron

[flip]

BTW, this is no ordinary grid. You might like to solve it from the beginning:

Code: Select all

 *-----------*
 |1.8|4..|5..|
 |...|..7|..2|
 |...|...|...|
 |---+---+---|
 |.2.|.9.|..7|
 |.6.|.5.|.89|
 |9..|.1.|.4.|
 |---+---+---|
 |...|...|...|
 |5..|6..|...|
 |..4|..3|9.8|
 *-----------*


I am curious, my counts are 10 simple nice loops, 7 ALS and 1 unique rectangle. Do you find anything more exotic? By itself, I admit that this is definitely not ordinary.
Thanks, flip

[Jeff]

I am curious, my counts are 10 simple nice loops, 7 ALS and 1 unique rectangle. Do you find anything more exotic? By itself, I admit that this is definitely not ordinary.

Hi Flip, I am quite surprised you were able to find so many simple nice loops in this grid; perhaps after a few ALSs. I haven't completely solved this one yet. Would you like to open a new thread and post your full solution for us?

Thanks in anticipation.

[ravel]

My solution is not terribly complicated. The most interesting step occurs at this point:

What does "not terribly complicated" mean for you ? The elimination of 8 in r7c4 and 2 in r1c6 (the explantion was a riddle) were not the hardest part for me. Is the rest of your solution also that easy?

[aeb]

The elimination of 8 in r7c4 and 2 in r1c6 (the explantion was a riddle) were not the hardest part for me. Is the rest of your solution also that easy?

Yes, but I threw away the piece of paper. If there is a stage where you do not know what to do next I can probably give a possible next step. There were maybe a dozen steps, none very difficult.

[flip]

I am quite surprised you were able to find so many simple nice loops in this grid; perhaps after a few ALSs. I haven't completely solved this one yet. Would you like to open a new thread and post your full solution for us?

Done, try here http://forum.enjoysudoku.com/viewtopic.php?t=3417
flip