dailysudoku.com Forum Index dailysudoku.com
Discussion of Daily Sudoku puzzles
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

VH+ 031122

 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Other puzzles
View previous topic :: View next topic  
Author Message
immpy



Joined: 06 May 2017
Posts: 570

PostPosted: Fri Mar 11, 2022 7:49 pm    Post subject: VH+ 031122 Reply with quote

Hello all, enjoy the puzzle.

Code:

+-------+-------+-------+
| 1 5 . | . 3 . | . 8 2 |
| 9 . . | . 7 . | . . 3 |
| . . . | 1 . 5 | . . . |
+-------+-------+-------+
| . . 9 | . . . | 6 . . |
| 5 8 . | . . . | . 7 1 |
| . . 4 | . . . | 5 . . |
+-------+-------+-------+
| . . . | 3 . 6 | . . . |
| 6 . . | . 2 . | . . 5 |
| 8 9 . | . 1 4 | . 6 7 |
+-------+-------+-------+

Play this puzzle online at the Daily Sudoku site

cheers...immp
Back to top
View user's profile Send private message
dongrave



Joined: 06 Mar 2014
Posts: 563

PostPosted: Sun Mar 13, 2022 1:13 am    Post subject: Reply with quote

Thanks for the puzzle immp! I enjoyed that! As usual, I used pencil and and paper to solve it - and ended up with a crazy chain (as usual).

After basics:
Code:
+------------------+------------------+----------------+
| 1    5     e67   | 46    3    9     |f47    8    2   |
| 9   d46    m68   | 2468  7   L28    | 1     5    3   |
| 234  234    2378 | 1     48   5     | 479  g49   6   |
+------------------+------------------+----------------+
| 237  1237   9    | 2478  5    12378 | 6    i234  48  |
| 5    8      236  | 249   469 k23    |j349   7    1   |
| 237  12367  4    | 2789  689  12378 | 5    i239  89  |
+------------------+------------------+----------------+
|b247 b247    5    | 3     89    6    | 2489  1   a4*9 |
| 6   c34     1    | 789   2     78   | 3489 h349  5   |
| 8    9      23   | 5     1     4    | 23    6    7   |
+------------------+------------------+----------------+

4*r7c9-r7c12=r8c2-(4=6)r2c2-(6=7)r1c3-(7=4)r1c7-(4=9)r3c8-(4*9=3)r8c8-r46c8=r5c7-(3=2)r5c6-(2=8)r2c6-(8=6)r2c3 contradiction (i.e. 6r2c23) => r7c9 <> 4; stte.


Last edited by dongrave on Sun Mar 13, 2022 5:44 pm; edited 1 time in total
Back to top
View user's profile Send private message
TomC



Joined: 30 Oct 2020
Posts: 349
Location: Wales

PostPosted: Sun Mar 13, 2022 8:41 am    Post subject: Reply with quote

After basics, I used a skyscraper on <4> in rows 1 and 4 to give -4 in r5c7

This got me to here
Code:

+-----------------+----------------+-------------+
| 1    5     67   | 46   3   9     | 47   8   2  |
| 9    46    68   | 2468 7   28g   | 1    5   3  |
| 2347 2347  2378 | 1    4-8 5     | 479  49  6  |
+-----------------+----------------+-------------+
| 237  1237  9    | 2478 5   12378 | 6   234 48c |
| 5    8     236  | 249  469 23f   | 39e  7   1  |
| 237  12367 4    | 2789 689 12378 | 5   239 89d |
+-----------------+----------------+-------------+
| 247  247   5    | 3    89a  6    | 2489 1  49b |
| 6    34    1    | 789  2    78   | 3489 349 5  |
| 8    9     23   | 5    1    4    | 23   6   7  |
+-----------------+----------------+-------------+


An XY chain a-g gives pincers on <8> in a + g leads to -8 r3c5 to solve
Back to top
View user's profile Send private message
Mogulmeister



Joined: 03 May 2007
Posts: 1151

PostPosted: Mon Mar 14, 2022 10:46 am    Post subject: Reply with quote



Overlapping ALS xz

Set A (green) {2,4,7,8,9} + yellow square
Set B (yellow) {4,9}

Restricted common is 4
Common candidate (red) is 9 and is eliminated as it is seen by green and yellow.
This then solves.
Back to top
View user's profile Send private message
Clement



Joined: 24 Apr 2006
Posts: 1110
Location: Dar es Salaam Tanzania

PostPosted: Wed Mar 16, 2022 3:33 pm    Post subject: Reply with quote

Two Steps
Code:

+------------------------+------------------------+---------------------+
| 1       5         67   | 46       3       9     | 47       8       2  |
| 9       46        68   | 2468     7       28    | 1        5       3  |
|a234     23-4      2378 | 1       h48      5     | 79-4     9-4     6  |
+------------------------+------------------------+---------------------+
| 237     1237      9    | 2478     5       12378 | 6        234     48 |
| 5       8         236  | 2469     469     23    | 349      7       1  |
| 237     12367     4    | 2789     689     12378 | 5        239     89 |
+------------------------+------------------------+---------------------+
|b247     247       5    | 3       g89      6     |f2489     1       49 |
| 6      c34        1    | 789      2       78    | 3489     349     5  |
| 8       9        d23   | 5        1       4     |e23       6       7  |
+------------------------+------------------------+---------------------+

Step 1: (4)r3c1 = r7c1 – (4=3)r8c2 – (3=2)r9c3 – r9c7 = (2-8)r7c7 = r7c5 – (8=4)r3c5 => - 4r3c278
Code:

+-------------------------+--------------------------+----------------------+
| 1        5          7   | 6         3        9     | 4        8        2  |
| 9       a46        a68  | 248       7       a28    | 1        5        3  |
| 234      234        238 | 1         48       5     | 7        9        6  |
+-------------------------+--------------------------+----------------------+
| 237      1237       9   | 278       5        12378 | 6        234      48 |
| 5        8          236 | 249       469     b23    |c39       7        1  |
| 237      12367      4   | 2789      689      12378 | 5        23       89 |
+-------------------------+--------------------------+----------------------+
| 247      247        5   | 3         89       6     | 289      1        49 |
| 6        3-4        1   | 789       2        78    | 89      e34       5  |
| 8        9          23  | 5         1        4     |d23       6        7  |
+-------------------------+--------------------------+----------------------+

Step 2: (4=682)r2c236 – (2=3)r5c6 – r5c7 = r9c7 – (3=4)r8c8 => - 4r8c2; stte
Back to top
View user's profile Send private message AIM Address
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Other puzzles All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group