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ZeroAssoluto
Joined: 05 Feb 2017 Posts: 872 Location: Rimini, Italy
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Posted: Fri Nov 24, 2023 9:50 am Post subject: Nov 24 VH |
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Hi everyone,
Code: |
+--------+----------+------------+
| 2 1 6 | 3 79 4 | 578 59 78 |
| 9 5 7 | 68 68 1 | 2 3 4 |
| 3 4 8 | 5 79 2 | 17 19 6 |
+--------+----------+------------+
| 6 8 3 | 1 2 7 | 9 4 5 |
| 5 7 4 | 68 368 9 | 18 12 238 |
| 1 2 9 | 4 38 5 | 6 7 38 |
+--------+----------+------------+
| 4 6 12 | 9 15 3 | 57 8 27 |
| 7 9 5 | 2 4 8 | 3 6 1 |
| 8 3 12 | 7 15 6 | 4 25 9 |
+--------+----------+------------+
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Play this puzzle online at the Daily Sudoku site
Quote: |
XY-Wing 1,7,8 in r1c9,r35c7 and -8 in r1c7,r56c9
or
XYZ-Wing 5,7,8 in r1c79,r7c7 and -7 in r3c7
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Ciao Gianni |
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TomC
Joined: 30 Oct 2020 Posts: 349 Location: Wales
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Posted: Sat Nov 25, 2023 9:35 am Post subject: |
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Remove <5> from r1c7, r9c8 to solve
Code: |
+--------+----------+---------------+
| 2 1 6 | 3 79 4 | x578 d59 78 |
| 9 5 7 | 68 68 1 | 2 3 4 |
| 3 4 8 | 5 79 2 | b17 c19 6 |
+--------+----------+---------------+
| 6 8 3 | 1 2 7 | 9 4 5 |
| 5 7 4 | 68 368 9 | 18 12 238 |
| 1 2 9 | 4 38 5 | 6 7 38 |
+--------+----------+---------------+
| 4 6 12 | 9 15 3 | a57 8 27 |
| 7 9 5 | 2 4 8 | 3 6 1 |
| 8 3 12 | 7 15 6 | 4 x25 9 |
+--------+----------+---------------+
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Quote: | XY chain abcd (57-17-19-59) gives pincers of <5> in a + d to remove <5> from x |
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Greenvilleguy
Joined: 01 Jul 2022 Posts: 24 Location: US
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Posted: Sat Nov 25, 2023 2:10 pm Post subject: |
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Also, Y wing in R1C9, R3C7, R5C7 removes <8> from R1C7.
Interestingly, a 3 must be in R5C5 or you would have a rectangle of "68'S", which is not allowed in a solvable puzzle. |
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