- Code: Select all
*-----------*
|5..|...|..4|
|.4.|2..|.6.|
|..7|...|5..|
|---+---+---|
|.3.|.1.|...|
|...|689|...|
|...|.5.|.7.|
|---+---+---|
|..5|...|1..|
|.6.|..3|.4.|
|1..|...|..8|
*-----------*
Play/Print this puzzle online
*-----------*
|5..|...|..4|
|.4.|2..|.6.|
|..7|...|5..|
|---+---+---|
|.3.|.1.|...|
|...|689|...|
|...|.5.|.7.|
|---+---+---|
|..5|...|1..|
|.6.|..3|.4.|
|1..|...|..8|
*-----------*
*-----------------------------------------------------------*
| 5 129 269 | 7 a39-6 168 | 239 289 4 |
|c389 4 89 | 2 b39 5 | 7 6 1 |
|d2369 129 7 | 89 4 e168 | 5 289 23 |
*-------------------+-------------------+-------------------|
| 269 3 269 | 4 1 7 | 8 5 69 |
| 7 5 4 | 6 8 9 | 23 1 23 |
| 69 8 1 | 3 5 2 | 4 7 69 |
*-------------------+-------------------+-------------------|
| 4 29 5 | 89 269 68 | 1 3 7 |
| 289 6 289 | 1 7 3 | 29 4 5 |
| 1 7 3 | 5 29 4 | 6 29 8 |
*-----------------------------------------------------------*
*--------------------------------------------------------------*
| 5 129 a269 | 7 e39-6 168 |d239 289 4 |
| 389 4 89 | 2 39 5 | 7 6 1 |
|b2369 129 7 | 89 4 168 | 5 289 c23 |
|--------------------+--------------------+--------------------|
| 269 3 269 | 4 1 7 | 8 5 69 |
| 7 5 4 | 6 8 9 | 23 1 23 |
| 69 8 1 | 3 5 2 | 4 7 69 |
|--------------------+--------------------+--------------------|
| 4 29 5 | 89 269 68 | 1 3 7 |
| 289 6 289 | 1 7 3 | 29 4 5 |
| 1 7 3 | 5 29 4 | 6 29 8 |
*--------------------------------------------------------------*
5 129 c269 | 7 d369 168 | 239 289 4
g389* 4 89* | 2 39 5 | 7 6 1
b269-3 129 7 | 89 4 168 | 5 289 a23
------------------------+----------------------+---------------------
269 3 269 | 4 1 7 | 8 5 69
7 5 4 | 6 8 9 | 23 1 23
69 8 1 | 3 5 2 | 4 7 69
------------------------+----------------------+---------------------
4 f29 5 | 89 e269 68 | 1 3 7
289* 6 289* | 1 7 3 | 29 4 5
1 7 3 | 5 29 4 | 6 29 8
+--------------+------------+------------+
| 5 129 269 | 7 369 168 | 239 289 4 |
| 389 4 89 | 2 39 5 | 7 6 1 |
| 2369 129 7 | 89 4 168 | 5 289 23 |
+--------------+------------+------------+
| 269 3 269 | 4 1 7 | 8 5 69 |
| 7 5 4 | 6 8 9 | 23 1 23 |
| 69 8 1 | 3 5 2 | 4 7 69 |
+--------------+------------+------------+
| 4 29 5 | 89 269 68 | 1 3 7 |
| 289 6 289 | 1 7 3 | 29 4 5 |
| 1 7 3 | 5 29 4 | 6 29 8 |
+--------------+------------+------------+
Marty R. wrote:
- Code: Select all
+--------------+------------+------------+
| 5 129 269 | 7 369 168 | 239 289 4 |
| 389 4 89 | 2 39 5 | 7 6 1 |
| 2369 129 7 | 89 4 168 | 5 289 23 |
+--------------+------------+------------+
| 269 3 269 | 4 1 7 | 8 5 69 |
| 7 5 4 | 6 8 9 | 23 1 23 |
| 69 8 1 | 3 5 2 | 4 7 69 |
+--------------+------------+------------+
| 4 29 5 | 89 269 68 | 1 3 7 |
| 289 6 289 | 1 7 3 | 29 4 5 |
| 1 7 3 | 5 29 4 | 6 29 8 |
+--------------+------------+------------+
Play this puzzle online at the Daily Sudoku site
I'll apologize in advance for this fiasco.
DP (28-18-12)R13C258 using externals
2r9c8=8r7c6=2r7c2
2r9c8=> contradiction and I can't figure out a way to notate the path leading to the invalidity, thus leaving 8r7c6=2r7c2
.-----------------.-----------------.-------------------.
| 5 129 269 | 7 369 168 | 29-3 289 4 |
| 389 4 89 | 2 39 5 | 7 6 1 |
| 2369 d129 7 | d89 4 d168 | 5 d289 d23 |
:-----------------+-----------------+-------------------:
| 269 3 269 | 4 1 7 | 8 5 69 |
| 7 5 4 | 6 8 9 | a23 1 2-3 |
| 69 8 1 | 3 5 2 | 4 7 69 |
:-----------------+-----------------+-------------------:
| 4 29 5 | c89 269 c68 | 1 3 7 |
| 289 6 289 | 1 7 3 | a29 4 5 |
| 1 7 3 | 5 c29 4 | 6 b29 8 |
'-----------------'-----------------'-------------------'
+--------------+------------+------------+
| 5 129 269 | 7 369 168 | 239 289 4 |
| c389 4 89 | 2 b39 5 | 7 6 1 |
| d2369 129 7 | a89 4 e168 | 5 289 23 |
+--------------+------------+------------+
| 269 3 269 | 4 1 7 | 8 5 69 |
| 7 5 4 | 6 8 9 | 23 1 23 |
| 69 8 1 | 3 5 2 | 4 7 69 |
+--------------+------------+------------+
| 4 29 5 | 9-8 269 f68 | 1 3 7 |
| 289 6 289 | 1 7 3 | 29 4 5 |
| 1 7 3 | 5 29 4 | 6 29 8 |
+--------------+------------+------------+