August 15, 2015

Post puzzles for others to solve here.

August 15, 2015

Postby ArkieTech » Fri Aug 14, 2015 11:33 pm

Code: Select all
 *-----------*
 |34.|1.6|...|
 |.9.|5..|.2.|
 |.2.|4..|...|
 |---+---+---|
 |...|.1.|..7|
 |..8|...|3.5|
 |.3.|69.|...|
 |---+---+---|
 |9..|...|...|
 |...|...|.73|
 |.8.|3..|4..|
 *-----------*


Play/Print this puzzle online
dan
User avatar
ArkieTech
 
Posts: 3355
Joined: 29 May 2006
Location: NW Arkansas USA

Re: August 15, 2015

Postby SteveG48 » Fri Aug 14, 2015 11:42 pm

Code: Select all
 *--------------------------------------------------*
 | 3    4    7    | 1    2    6    | 9    5    8    |
 |a168  9    16   | 5    3    78   | 17   2    4    |
 |a158  2    15   | 4    78   9    | 17   3    6    |
 *----------------+----------------+----------------|
 | 2    5    9    | 8    1    3    | 6    4    7    |
 | 16   16   8    | 7    4    2    | 3    9    5    |
 | 7    3    4    | 6    9    5    | 8    1    2    |
 *----------------+----------------+----------------|
 | 9    7    3    | 2    6    4    | 5    8    1    |
 | 4    16  b156  | 9    58   18   | 2    7    3    |
 | 5-1   8    2    | 3    57   17   | 4    6    9    |
 *--------------------------------------------------*


BUG+3: 1r23c1 = 1r8c3 => -1 r9c1 ; stte
Steve
User avatar
SteveG48
2019 Supporter
 
Posts: 4279
Joined: 08 November 2013
Location: Orlando, Florida

Re: August 15, 2015

Postby Leren » Fri Aug 14, 2015 11:42 pm

Code: Select all
*--------------------------------------------------------------*
| 3     4     7      | 1     2     6      | 9     5     8      |
|*168   9     6-1    | 5     3     78     | 17    2     4      |
|*158   2     5-1    | 4     78    9      | 17    3     6      |
|--------------------+--------------------+--------------------|
| 2     5     9      | 8     1     3      | 6     4     7      |
| 16    16    8      | 7     4     2      | 3     9     5      |
| 7     3     4      | 6     9     5      | 8     1     2      |
|--------------------+--------------------+--------------------|
| 9     7     3      | 2     6     4      | 5     8     1      |
| 4     16   *156    | 9     58    18     | 2     7     3      |
| 5-1   8     2      | 3     57    17     | 4     6     9      |
*--------------------------------------------------------------*

BUG + 3 Cells r23c1, r8c3 Digit 1 => - 1 r23c3, r9c1; stte

Leren
Leren
 
Posts: 5050
Joined: 03 June 2012

Re: August 15, 2015

Postby pjb » Sat Aug 15, 2015 12:22 am

Code: Select all
 3       4       7      | 1      2      6      | 9      5      8     
 168     9       16     | 5      3      78     | 17     2      4     
 158     2      a15     | 4     a78     9      |a17     3      6     
------------------------+----------------------+---------------------
 2       5       9      | 8      1      3      | 6      4      7     
 16      16      8      | 7      4      2      | 3      9      5     
 7       3       4      | 6      9      5      | 8      1      2     
------------------------+----------------------+---------------------
 9       7       3      | 2      6      4      | 5      8      1     
 4       16      16-5   | 9     b58     18     | 2      7      3     
 15      8       2      | 3      57     17     | 4      6      9     


(5=8)r3c357 - (8=5)r8c5 => -5 r8c3; stte

Phil
Last edited by pjb on Tue Aug 18, 2015 3:35 am, edited 2 times in total.
pjb
2014 Supporter
 
Posts: 2585
Joined: 11 September 2011
Location: Sydney, Australia

Re: August 15, 2015

Postby Marty R. » Sat Aug 15, 2015 1:03 am

Code: Select all
+------------+---------+--------+
| 3   4  7   | 1 2  6  | 9  5 8 |
| 168 9  16  | 5 3  78 | 17 2 4 |
| 158 2  15  | 4 78 9  | 17 3 6 |
+------------+---------+--------+
| 2   5  9   | 8 1  3  | 6  4 7 |
| 16  16 8   | 7 4  2  | 3  9 5 |
| 7   3  4   | 6 9  5  | 8  1 2 |
+------------+---------+--------+
| 9   7  3   | 2 6  4  | 5  8 1 |
| 4   16 156 | 9 58 18 | 2  7 3 |
| 15  8  2   | 3 57 17 | 4  6 9 |
+------------+---------+--------+

Play this puzzle online at the Daily Sudoku site

DP (16)r258c123, using externals

1r2c7=1r8c6-(1=65)r8c23-(5=1)r3c3=> -1r2c13,r3c7
Marty R.
 
Posts: 1508
Joined: 23 October 2012
Location: Rochester, New York, USA

Re: August 15, 2015

Postby Marty R. » Sat Aug 15, 2015 5:27 am

pjb wrote:
Code: Select all
 3       4       7      | 1      2      6      | 9      5      8     
 168     9       16     | 5      3      78     | 17     2      4     
 158     2      a15     | 4     a78     9      |a17     3      6     
------------------------+----------------------+---------------------
 2       5       9      | 8      1      3      | 6      4      7     
 16      16      8      | 7      4      2      | 3      9      5     
 7       3       4      | 6      9      5      | 8      1      2     
------------------------+----------------------+---------------------
 9       7       3      | 2      6      4      | 5      8      1     
 4       16      16-5   | 9     b58     18     | 2      7      3     
 15      8       2      | 3      57     17     | 4      6      9     


(5=8)r357c5 - (5=8)r8c5 => -5 r8c3; stte

Phil


Phil, I'm having trouble following. Is there a typo in the first term as to which cells? I'm puzzled by two consecutive terms (5=8).
Marty R.
 
Posts: 1508
Joined: 23 October 2012
Location: Rochester, New York, USA

Re: August 15, 2015

Postby pjb » Sat Aug 15, 2015 7:36 am

Another senior slip. It should be r3c357, as indicated by the a's
phil
pjb
2014 Supporter
 
Posts: 2585
Joined: 11 September 2011
Location: Sydney, Australia

Re: August 15, 2015

Postby Sudtyro2 » Sat Aug 15, 2015 10:44 am

Code: Select all
 *---------------------------------------------------*
 | 3     4    7    | 1    2    6    | 9    5    8    |
 |*16+8a 9   *16   | 5    3    78   | 17   2    4    |
 |d15-8  2    15   | 4    78   9    | 17   3    6    |
 |-----------------+----------------+----------------|
 | 2     5    9    | 8    1    3    | 6    4    7    |
 |*16   *16   8    | 7    4    2    | 3    9    5    |
 | 7     3    4    | 6    9    5    | 8    1    2    |
 |-----------------+----------------+----------------|
 | 9     7    3    | 2    6    4    | 5    8    1    |
 | 4    *16  *16+5b| 9    58   18   | 2    7    3    |
 |c15    8    2    | 3    57   17   | 4    6    9    |
 *---------------------------------------------------*

Nice one, Marty. Here's the same ADP using internals...
8r2c1 = 5r8c3 – r9c1 = 5r3c1 => -8r3c1; stte

SteveC
Sudtyro2
 
Posts: 754
Joined: 15 April 2013

Re: August 15, 2015

Postby bat999 » Sat Aug 15, 2015 11:24 am

Code: Select all
.-----------------.------------.----------.
|  3     4    7   | 1   2   6  | 9   5  8 |
|  168   9    16  | 5   3   78 | 17  2  4 |
| a15-8  2   15   | 4  b78  9  | 17  3  6 |
:-----------------+------------+----------:
|  2     5    9   | 8   1   3  | 6   4  7 |
|  16    16   8   | 7   4   2  | 3   9  5 |
|  7     3    4   | 6   9   5  | 8   1  2 |
:-----------------+------------+----------:
|  9     7    3   | 2   6   4  | 5   8  1 |
|  4     16   156 | 9   58  18 | 2   7  3 |
| b15    8    2   | 3  b57  17 | 4   6  9 |
'-----------------'------------'----------'
(5)r3c1 = (578)r9c15,r3c5 => -8 r3c1; stte
8-)
8-)
bat999
2017 Supporter
 
Posts: 677
Joined: 15 September 2014
Location: UK

Re: August 15, 2015

Postby Ngisa » Sat Aug 15, 2015 11:31 am

Code: Select all
+------------+---------+--------+
| 3   4  7   | 1 2  6  | 9  5 8 |
| c168 9  16  | 5 3  7-8 | 17 2 4 |
| 158 2  15  | 4 a78 9  | 17 3 6 |
+------------+---------+--------+
| 2   5  9   | 8 1  3  | 6  4 7 |
| c16  16 8   | 7 4  2  | 3  9 5 |
| 7   3  4   | 6 9  5  | 8  1 2 |
+------------+---------+--------+
| 9   7  3   | 2 6  4  | 5  8 1 |
| 4   16 156 | 9 58 18 | 2  7 3 |
| c15  8  2   | 3 b57 17 | 4  6 9 |
+------------+---------+--------+
(8=7)r3c5-(7=5)r9c5-(5=168)r259c1 => -8r2c6; stte

Clement
Ngisa
 
Posts: 1386
Joined: 18 November 2012

Re: August 15, 2015

Postby Marty R. » Sat Aug 15, 2015 3:37 pm

pjb wrote:Another senior slip. It should be r3c357, as indicated by the a's
phil



OK, Phil, I didn't look at the grid as closely as I should have. I am intimately acquainted with senior slips.

Now that I know where the ALS is, I can see the solution, but I still don't understand the 2nd term. How would it be said in English? R3c5=8, therefore r8c5 is not 5 and is 8. If r3c5 is 8, then r8c5 <> 8.
Marty R.
 
Posts: 1508
Joined: 23 October 2012
Location: Rochester, New York, USA

Re: August 15, 2015

Postby daj95376 » Sat Aug 15, 2015 4:43 pm

pjb wrote:Another senior slip. It should be r3c357, as indicated by the a's



Code: Select all
 3       4       7      | 1      2      6      | 9      5      8     
 168     9       16     | 5      3      78     | 17     2      4     
 158     2      a15     | 4     a78     9      |a17     3      6     
------------------------+----------------------+---------------------
 2       5       9      | 8      1      3      | 6      4      7     
 16      16      8      | 7      4      2      | 3      9      5     
 7       3       4      | 6      9      5      | 8      1      2     
------------------------+----------------------+---------------------
 9       7       3      | 2      6      4      | 5      8      1     
 4       16      16-5   | 9     b58     18     | 2      7      3     
 15      8       2      | 3      57     17     | 4      6      9     


(5=8)r3c357 - (5=8)r8c5 => -5 r8c3; stte

You had two senior moments.

_
daj95376
2014 Supporter
 
Posts: 2624
Joined: 15 May 2006

Re: August 15, 2015

Postby Sudtyro2 » Sat Aug 15, 2015 7:50 pm

bat999 wrote:
Code: Select all
.-----------------.------------.----------.
|  3     4    7   | 1   2   6  | 9   5  8 |
|  168   9    16  | 5   3   78 | 17  2  4 |
| a15-8  2   15   | 4  b78  9  | 17  3  6 |
:-----------------+------------+----------:
|  2     5    9   | 8   1   3  | 6   4  7 |
|  16    16   8   | 7   4   2  | 3   9  5 |
|  7     3    4   | 6   9   5  | 8   1  2 |
:-----------------+------------+----------:
|  9     7    3   | 2   6   4  | 5   8  1 |
|  4     16   156 | 9   58  18 | 2   7  3 |
| b15    8    2   | 3  b57  17 | 4   6  9 |
'-----------------'------------'----------'
(5)r3c1 = (578)r9c15,r3c5 => -8 r3c1; stte

So, right off the bat (sorry!), your notation seems to say that there is a derived strong inference between 5r3c1 and 8r3c5, which therefore implies -8r3c1.

To get there the long way around, I guess I would have written the AIC...
5r3c1 = 5r9c1 – (5=7)r9c5 – (7=8)r3c5 => -8r3c1, and maybe combine the last two nodes into an ALS...
5r3c1 = 5r9c1 – (5=78)r39c5 => -8r3c1.

But your notation is really following the AIC around cell by cell and noting that the three true digits (578) resolve the three cells, r9c15,r3c5. True digit 8r3c5 can then “see” 8r3c1. Is this the right idea?

SteveC
Sudtyro2
 
Posts: 754
Joined: 15 April 2013

Re: August 15, 2015

Postby bat999 » Sat Aug 15, 2015 8:17 pm

Sudtyro2 wrote:... the three true digits (578) resolve the three cells, r9c15,r3c5. True digit 8r3c5 can then “see” 8r3c1. Is this the right idea?

Yes, that's it.
If r3c1=5 then r3c1<>8
If r3c1<>5 then (through the chain) r3c1<>8
=> -8 r3c1

I think these two expressions are equivalent (because the 8 can only be in r3c5)
(5)r3c1 = (5)r9c1 – (5=7)r9c5 – (7=8)r3c5 => -8 r3c1
(5)r3c1 = (578)r9c15,r3c5 => -8 r3c1
8-)
bat999
2017 Supporter
 
Posts: 677
Joined: 15 September 2014
Location: UK

Re: August 15, 2015

Postby Marty R. » Sat Aug 15, 2015 8:36 pm

Sudtyro2 wrote:
bat999 wrote:
Code: Select all
.-----------------.------------.----------.
|  3     4    7   | 1   2   6  | 9   5  8 |
|  168   9    16  | 5   3   78 | 17  2  4 |
| a15-8  2   15   | 4  b78  9  | 17  3  6 |
:-----------------+------------+----------:
|  2     5    9   | 8   1   3  | 6   4  7 |
|  16    16   8   | 7   4   2  | 3   9  5 |
|  7     3    4   | 6   9   5  | 8   1  2 |
:-----------------+------------+----------:
|  9     7    3   | 2   6   4  | 5   8  1 |
|  4     16   156 | 9   58  18 | 2   7  3 |
| b15    8    2   | 3  b57  17 | 4   6  9 |
'-----------------'------------'----------'
(5)r3c1 = (578)r9c15,r3c5 => -8 r3c1; stte

So, right off the bat (sorry!), your notation seems to say that there is a derived strong inference between 5r3c1 and 8r3c5, which therefore implies -8r3c1.

To get there the long way around, I guess I would have written the AIC...
5r3c1 = 5r9c1 – (5=7)r9c5 – (7=8)r3c5 => -8r3c1, and maybe combine the last two nodes into an ALS...
5r3c1 = 5r9c1 – (5=78)r39c5 => -8r3c1.

But your notation is really following the AIC around cell by cell and noting that the three true digits (578) resolve the three cells, r9c15,r3c5. True digit 8r3c5 can then “see” 8r3c1. Is this the right idea?

SteveC


In another thread I used the Abe Lincoln quote, "'Tis better to remain silent and be thought a fool than to open your mouth and remove all doubt."
Too often I open my mouth and remove all doubt.

Much of what Bat does is a mystery to me and this is an example. I do not see how the -8 conclusion is drawn. If I interpret the 1st term correctly, it is r3c1=5. That's not an either/or situation since r3c1 has 3 possibilities, Steve's notation proves the -8 since in his solution r3c1 is either not 5 or =5.
Marty R.
 
Posts: 1508
Joined: 23 October 2012
Location: Rochester, New York, USA

Next

Return to Puzzles