The New Sudoku Players' Forum

[ArkieTech]

Code: Select all

 *-----------*
 |...|1..|..6|
 |..2|8..|...|
 |5..|9..|.34|
 |---+---+---|
 |6.8|...|2..|
 |...|...|...|
 |..4|...|7.5|
 |---+---+---|
 |73.|..6|..9|
 |...|..3|1..|
 |4..|..5|...|
 *-----------*


Play/Print this puzzle online

[Leren]

Code: Select all

*--------------------------------------------------------------------------------*
| 8       4       39       | 1       35      7        | 59      2       6        |
| 39      6       2        | 8       35      4        | 59      17     b17       |
| 5       17      17       | 9       6       2        | 8       3       4        |
|--------------------------+--------------------------+--------------------------|
| 6       7-5     8        |a35      47      19       | 2       49     a13       |
| 123     257     357      | 356     47      189      | 36      49      138      |
| 13      9       4        | 36      2       18       | 7       168     5        |
|--------------------------+--------------------------+--------------------------|
| 7       3       15       | 2       18      6        | 4       58      9        |
|c29     c258     569      | 4      c89      3        | 1       5678   c278      |
| 4       128     169      | 7       189     5        | 36      68      238      |
*--------------------------------------------------------------------------------*

als xy-wing: (5=1) r4c49 - (1=7) r2c9 - (7=5) r8c1259 => r4c2 <> 5; stte

Leren

[eleven]

Nice one, Leren.
There are many moves, which place a number, but dont solve (includung UR 689r89=>r8c3=6)
Finally i found this long chain:
(7=1)r4c249-(1=5)r679c8-(5=7)r37c3 => r3c2,r5c3<>7

[tlanglet]

A different two step view using ANSs ......

1: ANS(2368=1)r9c7892-(1=5=8)r7c38-(8=6)r9c8 => r9c3<>6

2: ANS(2578=9)r8c2891-(9=3=1)r26c1-(18=6)r6c68-(6=8)r9c8-r7c8=8r7c5 => r8c5<>8

Ted

[Leren]

Nice one, Leren.
There are many moves, which place a number, but dont solve (includung UR 689r89=>r8c3=6)
Finally i found this long chain:
(7=1)r4c249-(1=5)r679c8-(5=7)r37c3 => r3c2,r5c3<>7

Nice move, eleven (its another als xy-wing) but unfortunately it does not fully solve the puzzle - it needed 1 more vanilla xy-wing .

I found another single step als xy-wing move but it uses the same set of cells as my first move, so its not worth posting.

Leren

[Marty R.]

I'll once again subject myself to public humiliation and post a three-stepper.

W-Wing (36)
M-Wing (58 )
BUG+1

[eleven]

Nice move, eleven (its another als xy-wing) but unfortunately it does not fully solve the puzzle - it needed 1 more vanilla xy-wing .

Oops, so yet another one, which does not solve.