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Jan 06 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 940
Location: Rimini, Italy
PostPosted: Fri Jan 06, 2023 11:11 am    Post subject: Jan 06 VH Reply with quote
Hi everyone,

Code:

+--------+----------+----------+
| 7 5  8 | 3  2 4   | 6  1  9  |
| 4 1  3 | 6  9 8   | 27 27 5  |
| 9 2  6 | 1  7 5   | 4  3  8  |
+--------+----------+----------+
| 6 47 5 | 9  3 27  | 8  24 1  |
| 1 3  2 | 4  8 6   | 9  5  7  |
| 8 47 9 | 27 5 1   | 23 6  34 |
+--------+----------+----------+
| 2 9  1 | 8  6 37  | 5  47 34 |
| 3 6  7 | 5  4 9   | 1  8  2  |
| 5 8  4 | 27 1 237 | 37 9  6  |
+--------+----------+----------+

Play this puzzle online at the Daily Sudoku site

Quote:
XY-Wing
2,4,7 in r4c68,r7c8 and -7 in r7c6
2,3,7 in r6c7,r9c47 and -2 in r6c4
2,3,7 in r6c47,r9c7 and -7 in r9c4
BUG+1 in r9c6 -2 -3 and r9c6=7
W-Wing
2,7 in r2c8,r4c6 SL with number 7 in r7c68 and -2 in r4c8
2,7 in r2c7,r9c4 SL with number 2 in r6c47 and -7 in r9c7


Ciao Gianni
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TomC



Joined: 30 Oct 2020
Posts: 358
Location: Wales
PostPosted: Fri Jan 06, 2023 6:57 pm    Post subject: Reply with quote
Remove <4> from r4c2 and r6c9 to solve

Code:

+----------+-------------+-------------+
| 7  5   8 |  3   2  4   |  6   1   9  |
| 4  1   3 |  6   9  8   |  27  27  5  |
| 9  2   6 |  1   7  5   |  4   3   8  |
+----------+-------------+-------------+
| 6 x47  5 |  9   3  27  |  8  a24  1  |
| 1  3   2 |  4   8  6   |  9   5   7  |
| 8 f47  9 | e27  5  1   | b23  6  x34 |
+----------+-------------+-------------+
| 2  9   1 |  8   6  37  |  5   47  34 |
| 3  6   7 |  5   4  9   |  1   8   2  |
| 5  8   4 | d27  1  237 | c37  9   6  |
+----------+-------------+-------------+

Quote:
XY chain abcdef gives pincers of <4> in a + f to remove <4> from x
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