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VH+ 022321

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immpy

Joined: 06 May 2017
Posts: 574

Posted: Tue Feb 23, 2021 5:48 pm Post subject: VH+ 022321

Hello all, enjoy the puzzle...

Code:

+-------+-------+-------+
| . . 9 | . . . | . 3 . |
| 5 . 4 | . . . | . . 2 |
| . 6 . | 2 8 9 | 5 . . |
+-------+-------+-------+
| . . 3 | 6 7 . | . . . |
| . . . | 8 . 1 | . . . |
| . . . | . 9 2 | 3 . . |
+-------+-------+-------+
| . . 2 | 7 4 6 | 1 8 . |
| 1 . . | . . . | 9 . 7 |
| . 4 . | . . . | 2 . . |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

cheers...immp

dongrave

Joined: 06 Mar 2014
Posts: 572

Posted: Wed Feb 24, 2021 5:41 pm Post subject:

Code:

+-----------------+----------+---------------+
| 278 1278 9 | 14 5 47 | 678 3 168 |
| 5 178 4 | 13 6 37 | 78 9 2 |
| 3 6 17 | 2 8 9 | 5 17 4 |
+-----------------+----------+---------------+
| 248 12589 3 | 6 7 45 | 48 125 1589 |
| 2467 2579 57 | 8 3 1 | 467 2567 569 |
| 4678 1578 1578 | 45 9 2 | 3 1567 1568 |
+-----------------+----------+---------------+
| 9 35 2 | 7 4 6 | 1 8 35 |
| 1 358 6 | 35 2 358 | 9 4 7 |
| 78 4 578 | 9 1 358 | 2 56 356 |
+-----------------+----------+---------------+

(7*-4)r1c6=r4c6-(4=8)r4c7-(48=2)r4c1-(27*=8)r1c1-r1c79=r2c7 contradiction (i.e. 8r24c7) => r1c6 <> 7; stte.

Clement

Joined: 24 Apr 2006
Posts: 1113
Location: Dar es Salaam Tanzania

Posted: Mon Mar 08, 2021 4:47 pm Post subject: VH + 022321

Another two stepper

Code:

+---------------------+----------------+---------------------+
| 278 1278 9 | a14 5 b47 | 678 3 fa68-1 |
| 5 178 4 | 13 6 37 | 78 9 2 |
| 3 6 17 | 2 8 9 | 5 17 4 |
+---------------------+----------------+---------------------+
| 248 12589 3 | 6 7 c45 | d48 125 e1589 |
| 2467 2579 57 | 8 3 1 | 467 2567 569 |
| 4678 1578 1578 | 45 9 2 | 3 1567 e1568 |
+---------------------+----------------+---------------------+
| 9 35 2 | 7 4 6 | 1 8 35 |
| 1 358 6 | 35 2 358 | 9 4 7 |
| 78 4 578 | 9 1 358 | 2 56 356 |
+---------------------+----------------+---------------------+

Step 1: (14)r1c94 - (4)r1c6 = r4c6 - (4=8)r4c7 - r46c9 = (8)r1c9 => - 1r1c9

Code:

+-----------------+---------------+--------------------+
| 28 128 9 | 14 5 47 | 678 3 a68 |
| 5 18 4 | 13 6 37 | 78 9 2 |
| 3 6 7 | 2 8 9 | 5 1 4 |
+-----------------+---------------+--------------------+
| 248 9 3 | 6 7 f45 | e48 25 1 |
| 246 27 5 | 8 3 1 | d46 c267 9 |
| 468 78 1 | 4-5 9 2 | 3 c567 a568 |
+-----------------+---------------+--------------------+
| 9 35 2 | 7 4 6 | 1 8 a35 |
| 1 35 6 | 35 2 8 | 9 4 7 |
| 7 4 8 | 9 1 35 | 2 b56 a356 |
+-----------------+---------------+--------------------+

Step 2: (5=8|6|3|5)r1679c9 - (5=6)r6c9 - r65c8 = (6-4)r5c7 = r4c7 - (4=5)r4c6 => - 5r6c4; stte

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