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May 23 VH

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ZeroAssoluto

Joined: 05 Feb 2017
Posts: 941
Location: Rimini, Italy

Posted: Thu May 23, 2024 9:06 am Post subject: May 23 VH

Hi everyone,

Code:

+------------+----------+-------------+
| 8 4 167 | 9 3 17 | 126 12 5 |
| 12 3 127 | 178 6 5 | 9 4 18 |
| 9 5 16 | 18 2 4 | 1368 7 36 |
+------------+----------+-------------+
| 6 2 15 | 17 8 3 | 157 9 4 |
| 4 9 18 | 6 5 17 | 178 3 2 |
| 135 7 1358 | 2 4 9 | 158 6 18 |
+------------+----------+-------------+
| 25 6 4 | 3 9 8 | 12 125 7 |
| 23 1 9 | 5 7 26 | 4 8 36 |
| 7 8 235 | 4 1 26 | 36 25 9 |
+------------+----------+-------------+

Play this puzzle online at the Daily Sudoku site

X-Wing with number 1 r26c19 and r2c34,r6c37<>1

AND

XY-Wing 1,7,8 in r1c6,r2c49 and r1c78<>1

OR in only one step

AIC in r1c6
if 1 = r1c78,r2c4<>1
if 7 = r2c3 = 7 r2c1 = 2 r6c1 = 1 r2c9 = 1 and r1c78,r2c4<>1

Ciao Gianni

TomC

Joined: 30 Oct 2020
Posts: 358
Location: Wales

Posted: Fri May 24, 2024 2:16 pm Post subject: another way

Another example of forcing a UR - remove <6> from r1c3 to solve

Quote:

If r1c3=6, r3c3=1, r2c1=2, r7c1=5

Leads to a <12> UR in r17c78

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