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ZeroAssoluto
Joined: 05 Feb 2017
Posts: 870
Location: Rimini, Italy
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 Posted: Mon Mar 27, 2023 9:27 am Post subject: Mar 27 VH |
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Hi everyone,
| Code: |
+----------+---------+-------------+
| 8 47 79 | 2 1 6 | 5 479 3 |
| 5 6 179 | 3 8 4 | 2 179 179 |
| 3 14 2 | 9 5 7 | 6 8 14 |
+----------+---------+-------------+
| 7 2 5 | 8 6 1 | 49 3 49 |
| 1 3 8 | 4 9 2 | 7 5 6 |
| 4 9 6 | 5 7 3 | 1 2 8 |
+----------+---------+-------------+
| 9 8 4 | 67 2 5 | 3 167 17 |
| 6 5 37 | 1 34 9 | 8 47 2 |
| 2 17 137 | 67 34 8 | 49 4679 5 |
+----------+---------+-------------+
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Play this puzzle online at the Daily Sudoku site
| Quote: | | XY-Wing 1,4,7 in r37c9,r8c8 and -4 in r1c8 |
Ciao Gianni |
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TomC
Joined: 30 Oct 2020
Posts: 349
Location: Wales
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| Posted: Tue Mar 28, 2023 12:32 pm Post subject: |
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Remove <4> from r9c7 to solve
| Code: |
+----------+---------+-----------------+
| 8 47 79 | 2 1 6 | 5 .479 3 |
| 5 6 179 | 3 8 4 | 2 179 179 |
| 3 14 2 | 9 5 7 | 6 8 c14 |
+----------+---------+-----------------+
| 7 2 5 | 8 6 1 | e49 3 d49 |
| 1 3 8 | 4 9 2 | 7 5 6 |
| 4 9 6 | 5 7 3 | 1 2 8 |
+----------+---------+-----------------+
| 9 8 4 | 67 2 5 | 3 167 b17 |
| 6 5 37 | 1 34 9 | 8 a47 2 |
| 2 17 137 | 67 34 8 | x49 4679 5 |
+----------+---------+-----------------+
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| Quote: | Gianni's 147 XY wing in abc is also an XY chain abc with pincers on <4> in a + c to remove the <4> in r1c8
Increase this chain by two and you get an XY chain abcde with pincers on <4> in a + e to remove the <4> in r9c7 |
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