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A June Swoon VH++ 060224

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immpy

Joined: 06 May 2017
Posts: 574

Posted: Sun Jun 02, 2024 5:49 pm Post subject: A June Swoon VH++ 060224

Hello all, enjoy the puzzle.

Code:

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

Play this puzzle online at the Daily Sudoku site

cheers...immp

TomC

Joined: 30 Oct 2020
Posts: 359
Location: Wales

Posted: Mon Jun 03, 2024 8:09 am Post subject:

Remove <4> from r6c7 to solve

Code:

+-------------------+--------------+---------------+
| 6 7 2 | 3 5 49 | f49 1 8 |
| 9 34 34 | 1 8 6 | 7 5 2 |
| 1 58 58 | 249 7 249 | 3469 e39 46 |
+-------------------+--------------+---------------+
| 7 356 1 | 8 4 59 | 369 2 56 |
| 345 3458 9 | 6 2 7 | 1 d38 45 |
| a45 2 4568 | b59 3 1 | x469 c89 7 |
+-------------------+--------------+---------------+
| 2345 3456 3456 | 245 9 8 | 25 7 1 |
| 8 9 45 | 7 1 245 | 25 6 3 |
| 25 1 7 | 25 6 3 | 8 4 9 |
+-------------------+--------------+---------------+

Play this puzzle online at the Daily Sudoku site

Quote:

XY chain abcdef (45-59-89-38-39-49) gives pincers of <4> in a + f to remove <4> from x

dongrave

Joined: 06 Mar 2014
Posts: 572

Posted: Wed Jun 05, 2024 5:51 pm Post subject:

Thanks for the puzzle immp!

Code:

+-----------------+-------------+----------------+
| 6 7 2 | 3 5 49 | c49 1 8 |
| 9 34 34 | 1 8 6 | 7 5 2 |
| 1 58 58 | 249 7 249 | 3469 39 b46 |
+-----------------+-------------+----------------+
| 7 e356 1 | 8 4 59 | d369 2 a56* |
| 345 3458 9 | 6 2 7 | 1 38 45 |
| f45 2 4568 | 59 3 1 | g469 89 7 |
+-----------------+-------------+----------------+
| 2345 3456 3456 | 245 9 8 | 25 7 1 |
| 8 9 45 | 7 1 245 | 25 6 3 |
| 25 1 7 | 25 6 3 | 8 4 9 |
+-----------------+-------------+----------------+

Then I used the following chain to solve it: 6*r4c9-(6=4)r3c9-(4=9)r1c7-(6*9=3)r4c7-(36*=5)r4c2-(5=4)r6c1-(46*=9)r6c7 contradiction (i.e. 9r16c7) => r4c9 != 6; stte.

Clement

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

Posted: Thu Jun 20, 2024 5:18 pm Post subject: A June Swoon VH++ 060224

Code:

+----------------------+-----------------+------------------+
| 6 7 2 | 3 5 49 | 49 1 8 |
| 9 34 34 | 1 8 6 | 7 5 2 |
| 1 58 58 | 249 7 249 |c3469 b39 d46 |
+----------------------+-----------------+------------------+
| 7 356 1 | 8 4 e59 | 369 2 e56 |
| 345 3458 9 | 6 2 7 | 1 38 45 |
| 45 2 4568 | 5-9 3 1 | 469 a89 7 |
+----------------------+-----------------+------------------+
| 2345 3456 3456 | 245 9 8 | 25 7 1 |
| 8 9 45 | 7 1 245 | 25 6 3 |
| 25 1 7 | 25 6 3 | 8 4 9 |
+----------------------+-----------------+------------------+

(9)r6c8 = (9-3)r3c8 = (3-6)r3c7 = r3c9 - (6=59)r4c96 => - 9r6c4; stte

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