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Jul 01 VH

 
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ZeroAssoluto



Joined: 05 Feb 2017
Posts: 868
Location: Rimini, Italy

PostPosted: Fri Jul 01, 2022 9:11 am    Post subject: Jul 01 VH Reply with quote

Hi everyone,

Code:

+--------------+-------------+-----------+
| 1    267 5   | 247 267 3   | 8  9   24 |
| 2349 23  349 | 24  5   8   | 7  1   6  |
| 246  8   47  | 1   267 9   | 24 3   5  |
+--------------+-------------+-----------+
| 8    27  6   | 9   3   5   | 24 247 1  |
| 49   5   49  | 8   27  1   | 6  27  3  |
| 23   1   37  | 267 4   26  | 5  8   9  |
+--------------+-------------+-----------+
| 5    4   2   | 3   1   7   | 9  6   8  |
| 7    9   1   | 256 8   246 | 3  245 24 |
| 36   36  8   | 25  9   24  | 1  245 7  |
+--------------+-------------+-----------+

Play this puzzle online at the Daily Sudoku site

Quote:
XY-Wing 2,3,7 in r24c2,r6c3 and -3 in r2c3
Skyscraper
with number 7 in r36c3,r16c4 and -7 in r1c2,r3c5
with number 7 in r3c35,r6c34 and -7 in r1c4,r5c5
with number 7 in r14c2,r16c4 and -7 in r6c3
2-String Kite
with number 7 in r14c2,r6c34 and -7 in r1c4
with number 7 in r3c35,r16c4 and -7 in r6c3
W-Wing
2,3 in r2c2,r6c1 SL with number 3 in r9c12 and -2 in r23c1,r4c2
2,3 in r2c2,r6c1 SL with number 3 in r26c3 and -2 in r23c1,r4c2
Colors with number 7
color1 = r1c24,r3c5,r4c8,r5c5,r6c3
color2 = r3c3,r4c2,r5c8,r6c4
and delete color1


Ciao Gianni
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TomC



Joined: 30 Oct 2020
Posts: 349
Location: Wales

PostPosted: Fri Jul 01, 2022 12:34 pm    Post subject: Reply with quote

r6c1=2 to solve

Code:

+------------------+-------------+-----------+
|  1      267  5   | 247 267 3   | 8  9   24 |
|  2349  d23   349 | 24  5   8   | 7  1   6  |
|  246    8    47  | 1   267 9   | 24 3   5  |
+------------------+-------------+-----------+
|  8     c27   6   | 9   3   5   | 24 247 1  |
|  49     5    49  | 8   27  1   | 6  27  3  |
| a23     1   b37  | 267 4   26  | 5  8   9  |
+------------------+-------------+-----------+
|  5      4    2   | 3   1   7   | 9  6   8  |
|  7      9    1   | 256 8   246 | 3  245 24 |
| -36    -36   8   | 25  9   24  | 1  245 7  |
+------------------+-------------+-----------+

If a=3, b=7, c=2, d=3 leads to no <3>'s in box 7 or column 3

Is the <23> pair in "a" + "d" a W-wing?

YES, if you use the strong links on <3> in box 7 or column 3, you get if a=3, d=2 or if d=3, a=2
NO, if you follow the XY chain you get if a=3, d=3

So "a" cannot be <3> to resolve this situation
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