The New Sudoku Players' Forum

[yaaaay]

I seriously need some sleep. There is probably one of those fandangled X-Wings or something in here but my brain is screaming out for sleep not allowing the neurons to work properly.

[Sped]

Code: Select all

 *-----------*
 |.1.|3..|78.|
 |37.|1.8|..2|
 |824|.97|...|
 |---+---+---|
 |157|2.9|8..|
 |.8.|.1.|.9.|
 |943|8.6|12.|
 |---+---+---|
 |...|48.|6..|
 |4..|..5|..8|
 |.68|..1|.4.|
 *-----------*


It's a toughie. I haven't solved it yet, but I ran it through Simple Soduku.

It used a quad, three coloring steps, an x wing and an xy wing to solve it.

[daj95376]

Code: Select all

.1.3..78.37.1.8..2824.97...1572.98...8..1..9.9438.612....48.6..4....5..8.68..1.4.

r5      -  26    Naked  Pair
    b7  -  39    Naked  Pair
    b6  -  7     Locked Candidate (1)
    b3  -  1356  Naked  Quad
r3c8    <> 3     XY-Wing    on [r2c8]
r5c7    <> 3     XY-Wing    on [r2c8] (optional)
r4c5    <> 3     Sashimi Swordfish r359/c5(6)79


[Carcul]

Code: Select all

 *-----------------------------------------------------*
 | 56    1     569 | 3     2456  24 | 7     8     49   |
 | 3     7     569 | 1     456   8  | 49    56    2    |
 | 8     2     4   | 56    9     7  | 35    1356  1356 |
 |-----------------+----------------+------------------|
 | 1     5     7   | 2     34    9  | 8     36    346  |
 | 26    8     26  | 57    1     34 | 345   9     3457 |
 | 9     4     3   | 8     57    6  | 1     2     57   |
 |-----------------+----------------+------------------|
 | 257   39    125 | 4     8     23 | 6     1357  1359 |
 | 4     39    12  | 679   2367  5  | 239   137   8    |
 | 257   6     8   | 79    237   1  | 2359  4     359  |
 *-----------------------------------------------------*


[r5c6]=3=[r4c5]-3-[r4c8]-6-[r2c8]-5-[r3c7]-3-[r3c8]=3=[r78c8]-3-[r9c79]
=3=[r9c5]-3-[r7c6]=3=[r5c6], => r5c6=3 and the puzzle is solved.

Carcul

[yaaaay]

Thanks Guys!

Been a bit busy at work to reply, we were launching our new site and all that entails!

I'm glad I wasn't being dumb, as Sped says, "It's a toughy" - Thanks Sped!

Thanks Daj and Carcul, I won't look at the whole solution though, just the first few as tips!