- Code: Select all
*-----------*
|..1|.69|...|
|.35|7.2|...|
|9..|.1.|..6|
|---+---+---|
|2..|.4.|87.|
|...|...|...|
|.84|.9.|..5|
|---+---+---|
|5..|...|..4|
|...|8.6|53.|
|...|47.|9..|
*-----------*
Play/Print this puzzle online
July 24, 2014
14 posts
• Page 1 of 1
July 24, 2014
by ArkieTech » Wed Jul 23, 2014 11:43 pm
Play/Print this puzzle online
dan
-
ArkieTech - Posts: 3355
- Joined: 29 May 2006
- Location: NW Arkansas USA
Re: July 24, 2014
by Leren » Thu Jul 24, 2014 12:45 am
- Code: Select all
*--------------------------------------------------------------*
|f78 4 1 | 35 6 9 |e237 258 238 |
| 6 3 5 | 7 8 2 | 4 9 1 |
| 9 27 28-7 | 35 1 4 |d37 58 6 |
|--------------------+--------------------+--------------------|
| 2 5 6 | 1 4 3 | 8 7 9 |
| 13-7 9 a37 | 26 5 8 | 1236 4 23 |
|b13 8 4 | 26 9 7 |c13 26 5 |
|--------------------+--------------------+--------------------|
| 5 27 278 | 9 3 1 | 26 268 4 |
| 4 1 9 | 8 2 6 | 5 3 7 |
| 38 6 238 | 4 7 5 | 9 1 28 |
*--------------------------------------------------------------*
W Wing with transport: (7=3) r5c3 - r6c1 = r6c7 - (3=7) r3c7 - r1c7 = (7) r1c1 => - 7 r3c3, r5c1; stte
Leren
- Leren
- Posts: 5041
- Joined: 03 June 2012
Re: July 24, 2014
by pjb » Thu Jul 24, 2014 12:45 am
- Code: Select all
a78 4 1 | 35 6 9 | 23-7 258 238
6 3 5 | 7 8 2 | 4 9 1
9 2-7 28-7 | 35 1 4 |e37 58 6
---------------------+----------------------+---------------------
2 5 6 | 1 4 3 | 8 7 9
137 9 37 | 26 5 8 | 1236 4 23
c13 8 4 | 26 9 7 |d13 26 5
---------------------+----------------------+---------------------
5 27 278 | 9 3 1 | 26 268 4
4 1 9 | 8 2 6 | 5 3 7
b38 6 238 | 4 7 5 | 9 1 28
(7=8)r1c1 - (8=3)r9c1 - (3=1)r6c1 - (1=3)r6c7 - (3=7)r3c7 => -7 r1c7, r3c23; stte
Phil
PS Good heavens - a dead heat!
- pjb
- 2014 Supporter
- Posts: 2568
- Joined: 11 September 2011
- Location: Sydney, Australia
Re: July 24, 2014
by SteveG48 » Thu Jul 24, 2014 1:43 am
- Code: Select all
*-----------------------------------------------------------*
| 78 4 1 | 5-3 6 9 | 237 258 ag238 |
| 6 3 5 | 7 8 2 | 4 9 1 |
| 9 27 278 |h35 1 4 | 37 h58 6 |
*-------------------+-------------------+-------------------|
| 2 5 6 | 1 4 3 | 8 7 9 |
| 137 9 37 | 26 5 8 | 1236 4 b23 |
|d13 8 4 | 26 9 7 |c13 26 5 |
*-------------------+-------------------+-------------------|
| 5 27 278 | 9 3 1 | 26 268 4 |
| 4 1 9 | 8 2 6 | 5 3 7 |
|e38 6 238 | 4 7 5 | 9 1 f28 |
*-----------------------------------------------------------*
(3)r1c9 = r5c9 - r6c7 = r6c1 - (3=8)r9c1 - r9c9 = r1c9 - (8=3)r3c48 => -3 r1c4 ; stte
Steve
-
SteveG48 - 2019 Supporter
- Posts: 4248
- Joined: 08 November 2013
- Location: Orlando, Florida
Re: July 24, 2014
by SteveG48 » Thu Jul 24, 2014 2:11 am
I had to include this one. I love finding L shaped DPs. Don't know why.
(8*)r7c8 = r9c9 - (8=7)r569c1 - (7=3)r5c3 - (3=1)r5c7[DP 2/6 r5c47,r6c48,r7c78*] - (1=7)r36c7 - (7=8)r3c23 => -8 r3c8 ; stte
- Code: Select all
*------------------------------------------------------------*
| 78 4 1 | 35 6 9 | 237 258 238 |
| 6 3 5 | 7 8 2 | 4 9 1 |
| 9 g27 g278 | 35 1 4 | f37 5-8 6 |
*-------------------+-------------------+--------------------|
| 2 5 6 | 1 4 3 | 8 7 9 |
|c137 9 d37 |*26 5 8 |e*1236 4 23 |
|c13 8 4 |*26 9 7 | f13 *26 5 |
*-------------------+-------------------+--------------------|
| 5 27 278 | 9 3 1 | *26 a*268 4 |
| 4 1 9 | 8 2 6 | 5 3 7 |
|c38 6 238 | 4 7 5 | 9 1 b28 |
*------------------------------------------------------------*
(8*)r7c8 = r9c9 - (8=7)r569c1 - (7=3)r5c3 - (3=1)r5c7[DP 2/6 r5c47,r6c48,r7c78*] - (1=7)r36c7 - (7=8)r3c23 => -8 r3c8 ; stte
Steve
-
SteveG48 - 2019 Supporter
- Posts: 4248
- Joined: 08 November 2013
- Location: Orlando, Florida
Re: July 24, 2014
by tlanglet » Thu Jul 24, 2014 3:51 am
- Code: Select all
*------------------------------------------------------------*
|g78 4 1 | 35 6 9 | f237 258 238 |
| 6 3 5 | 7 8 2 | 4 9 1 |
| 9 27 278 | 35 1 4 | e37 58 6 |
|-------------------+-------------------+--------------------|
| 2 5 6 | 1 4 3 | 8 7 9 |
| 137 9 37 |*26 5 8 |*c1236 4 23 |
| 13 8 4 |*26 9 7 | d13 *26 5 |
|-------------------+-------------------+--------------------|
| 5 27 278 | 9 3 1 | *26 *b268 4 |
| 4 1 9 | 8 2 6 | 5 3 7 |
|h38 6 238 | 4 7 5 | 9 1 ai2-8 |
*------------------------------------------------------------*
Steve, I also like ADPs, especially if they involve six or more cells. Some deletions were available with a shorter path but did not complete the puzzle so this is a long solution.
(2=8)r9c9-AUR(26)r5c47,r6c48,r7c78[8r7c8=(13)r5c7] = ls(13)r56c7-(3=7)r3c7-7r1c7=(7-8)r1c1=8r9c1-(8=2)r9c9 => r9c9=2
Ted
- tlanglet
- 2010 Supporter
- Posts: 538
- Joined: 29 May 2010
Re: July 24, 2014
by daj95376 » Thu Jul 24, 2014 4:18 am
_
Hmmm!!!
_
Hmmm!!!
- Code: Select all
+---------------------------------------------------------------+
| 78 4 1 | 35 6 9 | 237 258 238 |
| 6 3 5 | 7 8 2 | 4 9 1 |
| 9 27 278 | d35 1 4 | c37 e5-8 6 |
|--------------------+--------------------+---------------------|
| 2 5 6 | 1 4 3 | 8 7 9 |
| 137 9 37 | *26 5 8 | b*26+13 4 23 |
| 13 8 4 | *26 9 7 | b 13 *26 5 |
|--------------------+--------------------+---------------------|
| 5 27 278 | 9 3 1 | *26 a*26+8 4 |
| 4 1 9 | 8 2 6 | 5 3 7 |
| 38 6 238 | 4 7 5 | 9 1 28 |
+---------------------------------------------------------------+
# 36 eliminations remain
8r7c8 =DP= (13)r56c7 - 3r3c7 = (3-5)r3c4 = 5r3c8 => -8 r3c8
_
- daj95376
- 2014 Supporter
- Posts: 2624
- Joined: 15 May 2006
Re: July 24, 2014
by blue » Thu Jul 24, 2014 5:12 am
- Code: Select all
+----------------+-----------+------------------+
| -8(7) 4 1 | 35 6 9 | 3(27) 258 23(8) |
| 6 3 5 | 7 8 2 | 4 9 1 |
| 9 27 278 | 35 1 4 | 37 58 6 |
+----------------+-----------+------------------+
| 2 5 6 | 1 4 3 | 8 7 9 |
| 137 9 37 | 26* 5 8 | 26*13 4 23 |
| 13 8 4 | 26* 9 7 | 13 26* 5 |
+----------------+-----------+------------------+
| 5 27 278 | 9 3 1 | 26* 26*8 4 |
| 4 1 9 | 8 2 6 | 5 3 7 |
| 38 6 238 | 4 7 5 | 9 1 (28) |
+----------------+-----------+------------------+
One using externals 2r1c7 and 2r9c9:
7r1c1 = 7r1c7 - DP(2r1c7 = 2r9c9) - 8r9c9 = 8r1c9 => r1c1<>8; stte
- blue
- Posts: 979
- Joined: 11 March 2013
Re: July 24, 2014
by storm_norm22 » Thu Jul 24, 2014 10:10 am
using the SSTS (simple sudoku technique set) methods first, you get one xy-wing (238)
then a x-wing on 8's
then a xy-wing on (237)
brings you to this grid.
the grouped w-wing (37) finishes it.
(7=3)r5c3 - (3)r5c79 = (3)r6c7 - (3=7)r3c7; r3c3 <> 7
then a x-wing on 8's
then a xy-wing on (237)
brings you to this grid.
- Code: Select all
+-------------+----------+-------------------+
| 78 4 1 | 35 6 9 | 237 25 238 |
| 6 3 5 | 7 8 2 | 4 9 1 |
| 9 2 8-7 | 35 1 4 | (37) 58 6 |
+-------------+----------+-------------------+
| 2 5 6 | 1 4 3 | 8 7 9 |
| 17 9 (37) | 26 5 8 | 126(3) 4 2(3) |
| 13 8 4 | 26 9 7 | 1(3) 26 5 |
+-------------+----------+-------------------+
| 5 7 28 | 9 3 1 | 26 268 4 |
| 4 1 9 | 8 2 6 | 5 3 7 |
| 38 6 23 | 4 7 5 | 9 1 28 |
+-------------+----------+-------------------+
the grouped w-wing (37) finishes it.
(7=3)r5c3 - (3)r5c79 = (3)r6c7 - (3=7)r3c7; r3c3 <> 7
Norm
- storm_norm22
- Posts: 89
- Joined: 21 November 2012
- Location: east coast, USA
Re: July 24, 2014
by Marty R. » Thu Jul 24, 2014 4:39 pm
- Code: Select all
+------------+--------+--------------+
| 78 4 1 | 35 6 9 | 237 258 238 |
| 6 3 5 | 7 8 2 | 4 9 1 |
| 9 27 278 | 35 1 4 | 37 58 6 |
+------------+--------+--------------+
| 2 5 6 | 1 4 3 | 8 7 9 |
| 137 9 37 | 26 5 8 | 1236 4 23 |
| 13 8 4 | 26 9 7 | 13 26 5 |
+------------+--------+--------------+
| 5 27 278 | 9 3 1 | 26 268 4 |
| 4 1 9 | 8 2 6 | 5 3 7 |
| 38 6 238 | 4 7 5 | 9 1 28 |
+------------+--------+--------------+
Play this puzzle online at the Daily Sudoku site
Type 2 UR (27): 8r3c3=8r7c3 yields common outcome.
R3c3=8-(8=5)r3c8-(5=3)r3c4-(3=7)r3c7
R7c3=8-(8=3)r9c1-r6c1=3r6c7-(3=7)r3c7=>r3c7=7
- Marty R.
- Posts: 1508
- Joined: 23 October 2012
- Location: Rochester, New York, USA
Re: July 24, 2014
by eleven » Thu Jul 24, 2014 5:52 pm
Nice, Marty.
How can you exclude 2r1c8 ? Don't you need something like 2r1c8->6r6c7->8r7c8->2r9c9 ?
blue wrote:One using externals 2r1c7 and 2r9c9
How can you exclude 2r1c8 ? Don't you need something like 2r1c8->6r6c7->8r7c8->2r9c9 ?
- eleven
- Posts: 3097
- Joined: 10 February 2008
Re: July 24, 2014
by blue » Thu Jul 24, 2014 6:12 pm
eleven wrote:blue wrote:One using externals 2r1c7 and 2r9c9
How can you exclude 2r1c8 ? Don't you need something like 2r1c8->6r6c7->8r7c8->2r9c9 ?
Hi eleven,
It went like this:
If 2r1c7 was false, there would be a hidden 26 pair in the DP cells in c7 (eliminating "internals" 13r5c7).
If 2r9c9 was false, there would be a hidden 26 pair in the DP cells in b9 (eliminating "internal" 8r7c8).
If both were false, the combination would produce the DP.
Edit: "2r9c9" typo fixed.
Last edited by blue on Thu Jul 24, 2014 7:11 pm, edited 1 time in total.
- blue
- Posts: 979
- Joined: 11 March 2013
Re: July 24, 2014
by blue » Thu Jul 24, 2014 6:15 pm
- Code: Select all
+-----------------+-----------+-------------------+
| (78) 4 1 | 35 6 9 | 3(27) 258 238 |
| 6 3 5 | 7 8 2 | 4 9 1 |
| 9 27 27(8) | 35 1 4 | 37 5-8 6 |
+-----------------+-----------+-------------------+
| 2 5 6 | 1 4 3 | 8 7 9 |
| 137 9 37 | 26* 5 8 | 26*13 4 23 |
| 13 8 4 | 26* 9 7 | 13 26* 5 |
+-----------------+-----------+-------------------+
| 5 27 278 | 9 3 1 | 26* 26*(8) 4 |
| 4 1 9 | 8 2 6 | 5 3 7 |
| 38 6 238 | 4 7 5 | 9 1 28 |
+-----------------+-----------+-------------------+
Here's another one for 8r3c8, using an internal/external combination:
DP(8r7c8 = 2r1c7) - 7r1c7 = (7-8)r1c1 = 8r3c3 => r3c8<>8; stte
- blue
- Posts: 979
- Joined: 11 March 2013
Re: July 24, 2014
by eleven » Thu Jul 24, 2014 10:38 pm
blue wrote:It went like this:
If 2r1c7 was false, there would be a hidden 26 pair in the DP cells in c7 (eliminating "internals" 13r5c7).
If 2r9c9 was false, there would be a hidden 26 pair in the DP cells in b9 (eliminating "internal" 8r7c8).
If both were false, the combination would produce the DP.
Ah, that's tricky, nice.
- eleven
- Posts: 3097
- Joined: 10 February 2008
14 posts
• Page 1 of 1
