- Code: Select all
*-----------*
|.47|2..|..5|
|.8.|16.|...|
|1..|..7|...|
|---+---+---|
|2..|...|.13|
|5..|...|..8|
|91.|...|..4|
|---+---+---|
|...|3..|..6|
|...|.12|.4.|
|7..|..9|85.|
*-----------*
Play/Print this puzzle online
*-----------*
|.47|2..|..5|
|.8.|16.|...|
|1..|..7|...|
|---+---+---|
|2..|...|.13|
|5..|...|..8|
|91.|...|..4|
|---+---+---|
|...|3..|..6|
|...|.12|.4.|
|7..|..9|85.|
*-----------*
*--------------------------------------------------------------*
| 6 4 7 | 2 9 3 | 1 8 5 |
| 3 8 d29 | 1 6 5 | 4 c79 279 |
| 1 259 259 | 4 8 7 | 6 3 29 |
|--------------------+--------------------+--------------------|
| 2 67 68 | 5789 57 4 | 579 1 3 |
| 5 37 4 | 79 23 1 | 279 6 8 |
| 9 1 d8-3 | 578 a23 6 | 257 b27 4 |
|--------------------+--------------------+--------------------|
| 4 59 1 | 3 57 8 | 27 279 6 |
| 8 569 569 | 57 1 2 | 3 4 79 |
| 7 23 d23 | 6 4 9 | 8 5 1 |
*--------------------------------------------------------------*
6 4 7 | 2 9 3 | 1 8 5
3 8 a29 | 1 6 5 | 4 b79 279
1 59-2 259 | 4 8 7 | 6 3 29
---------------------+----------------------+---------------------
2 67 68 | 5789 57 4 | 579 1 3
5 f37 4 | 79 e23 1 |d279 6 8
9 1 38 | 578 23 6 | 257 c27 4
---------------------+----------------------+---------------------
4 59 1 | 3 57 8 | 27 279 6
8 569 569 | 57 1 2 | 3 4 79
7 g23 3-2 | 6 4 9 | 8 5 1
*--------------------------------------------------------------*
| 6 4 7 | 2 9 3 | 1 8 5 |
| 3 8 c29 | 1 6 5 | 4 7-9 279 |
| 1 259 259 | 4 8 7 | 6 3 29 |
|--------------------+--------------------+--------------------|
| 2 b67 b68 | 5789 b57 4 | 579 1 3 |
| 5 37 4 | 79 23 1 | 279 6 8 |
| 9 1 c38 | 578 23 6 | 257 27 4 |
|--------------------+--------------------+--------------------|
| 4 59 1 | 3 a57 8 |a27 a279 6 |
| 8 569 569 | 57 1 2 | 3 4 79 |
| 7 23 c23 | 6 4 9 | 8 5 1 |
*--------------------------------------------------------------*
*-----------------------------------------------------------*
| 6 4 7 | 2 9 3 | 1 8 5 |
| 3 8 b29 | 1 6 5 | 4 b79 279 |
| 1 259 259 | 4 8 7 | 6 3 29 |
|-------------------+-------------------+-------------------|
| 2 67 68 | 5789 57 4 | 579 1 3 |
| 5 37 4 | 79 23 1 | 279 6 8 |
| 9 1 8-3 | 578 c23 6 | 257 c27 4 |
|-------------------+-------------------+-------------------|
| 4 59 1 | 3 57 8 | 27 279 6 |
| 8 569 569 | 57 1 2 | 3 4 79 |
| 7 23 a23 | 6 4 9 | 8 5 1 |
*-----------------------------------------------------------*
(3=2)r9c3-(2=7)r3c28-(7=3)r6c58 => -3r6c3; ste
+-----------+-----------+-------------+
| 6 4 7 | 2 9 3 | 1 8 5 |
| 3 8 29 | 1 6 5 | 4 79 279 |
| 1 259 259 | 4 8 7 | 6 3 29 |
+-----------+-----------+-------------+
| 2 67 68 | 5789 57 4 | 579 1 3 |
| 5 37 4 | 79 23 1 | 279 6 8 |
| 9 1 38 | 578 23 6 | 257 27 4 |
+-----------+-----------+-------------+
| 4 59 1 | 3 57 8 | 27 279 6 |
| 8 569 569 | 57 1 2 | 3 4 79 |
| 7 23 23 | 6 4 9 | 8 5 1 |
+-----------+-----------+-------------+
Marty R. wrote:
- Code: Select all
+-----------+-----------+-------------+
| 6 4 7 | 2 9 3 | 1 8 5 |
| 3 8 29 | 1 6 5 | 4 79 279 |
| 1 259 259 | 4 8 7 | 6 3 29 |
+-----------+-----------+-------------+
| 2 67 68 | 5789 57 4 | 579 1 3 |
| 5 37 4 | 79 23 1 | 279 6 8 |
| 9 1 38 | 578 23 6 | 257 27 4 |
+-----------+-----------+-------------+
| 4 59 1 | 3 57 8 | 27 279 6 |
| 8 569 569 | 57 1 2 | 3 4 79 |
| 7 23 23 | 6 4 9 | 8 5 1 |
+-----------+-----------+-------------+
Play this puzzle online at the Daily Sudoku site
I can often find a long chain when there's a shorter one available.
(7=5)r7c5-(5=9)r7c2-r7c8=r8c9-(9=2)r3c9-r3c23=r2c3-(238=6)r694c3-(6=7)r2c2=>r4c5<>7
7b53 wrote:UR (27) r67c78
(5)r8c4 = (7)r8c9
if this is true, then the two cells are solved. [ r8c4=5 and r8c9=7 ]
because the other combination for [ 7r8c4, 9r8c9 ] would be false for [ 5r8c4 and 7r8c9 ]