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  Topic: Vanhegan extreme
susume

Replies: 5
Views: 4419

PostForum: Other puzzles   Posted: Fri Sep 23, 2011 2:37 am   Subject: Vanhegan extreme
It certainly wasn't "friendly." I managed it with three Nice Loops and an X chain, which I append here not for any claim to beauty, but in case anyone has a bad case of insomnia:
Continuou ...
  Topic: Puzzle 11/08/19: ~ XY
susume

Replies: 5
Views: 16693

PostForum: Puzzles by daj   Posted: Sun Aug 21, 2011 4:44 am   Subject: Puzzle 11/08/19: ~ XY
Think of it not as an error, but as an abundance of solution. I only meant to point out that you had a fine 2-stepper. Smile
  Topic: Puzzle 11/08/19: ~ XY
susume

Replies: 5
Views: 16693

PostForum: Puzzles by daj   Posted: Sun Aug 21, 2011 2:01 am   Subject: Puzzle 11/08/19: ~ XY
turbot (5) r9 + c9; r2c2<>5
almost XY wing [(13)r9c4, (39)r9c3, (19)r7c2] =(7)r7c2 -(7=1)r7c9; r7c4<>1

Marty, if I'm not mistaken, your first two steps are enough to solve it.
  Topic: Puzzle 11/08/13: ~ Advanced (BBDB?)
susume

Replies: 5
Views: 19867

PostForum: Puzzles by daj   Posted: Mon Aug 15, 2011 4:12 pm   Subject: Puzzle 11/08/13: ~ Advanced (BBDB?)
+------------+-----------+-----------------+
| 7 6 3 | 25 25 9 | 1 8 4 |
| 9 8 1 | 36 36 4 | 27 5 27 |
| 5 2 4 | 1 7 8 | 9 3 6 |
+------------+-- ...
  Topic: Puzzle 11/08/12: ~ XY (BBDB?)
susume

Replies: 15
Views: 33201

PostForum: Puzzles by daj   Posted: Sun Aug 14, 2011 4:00 pm   Subject: Puzzle 11/08/12: ~ XY (BBDB?)
Thank you Peter, and nice find, Marty.

Peter, where you have (6=2)r5c6 I wonder if you mean (6=2)r5c7?

~Sue

edit: The double bar || is a sideways equal sign, or strong link. Here it means & ...
  Topic: Puzzle 11/08/12: ~ XY (BBDB?)
susume

Replies: 15
Views: 33201

PostForum: Puzzles by daj   Posted: Sat Aug 13, 2011 12:05 am   Subject: Puzzle 11/08/12: ~ XY (BBDB?)
I think you mean I used too many boxes? Bother. Thanks for setting me straight.

edit: Hopefully this will recover a shred or two of my dignity:

X wing 7 r34c59
X wing 2 r34c19
S wing 72 (7 ...
  Topic: Puzzle 11/08/12: ~ XY (BBDB?)
susume

Replies: 15
Views: 33201

PostForum: Puzzles by daj   Posted: Fri Aug 12, 2011 10:02 pm   Subject: Puzzle 11/08/12: ~ XY (BBDB?)
X wing 7 r34c59; r34c16<>7
X wing 2 r34c19; r34c5<>2
DP (26)(67)(27)r34c159; r4c5=1
  Topic: Puzzle 11/08/11: ~ XY
susume

Replies: 3
Views: 14303

PostForum: Puzzles by daj   Posted: Fri Aug 12, 2011 2:03 am   Subject: Puzzle 11/08/11: ~ XY
I think this is the first time I've found one of these. I recognized it first as a longer nice loop, then rearranged it until it matched one of the approved patterns.
M wing 45: SL 5 r2c15, SL 4 r2 ...
  Topic: Puzzle 11/08/04: ~ Advanced
susume

Replies: 8
Views: 21926

PostForum: Puzzles by daj   Posted: Sat Aug 06, 2011 8:08 pm   Subject: Puzzle 11/08/04: ~ Advanced
I had fun with this one.

kite (8)r3c7 =r3c4 -r2c6 =r9c6; r9c7<>8
skyscraper (8) r34; r2c8<>8
XY wing (14)(48)(18) pivot r2c9; r1c4<>1
  Topic: Puzzle 11/08/04: ~ Extreme
susume

Replies: 4
Views: 15805

PostForum: Puzzles by daj   Posted: Fri Aug 05, 2011 2:33 am   Subject: Puzzle 11/08/04: ~ Extreme
+--------------+------------+----------------+
| 4 8 7 | 9 1 3 | 2 6 5 |
| 35 35 6 | 8 4 2 | 17 17 9 |
| 2 1 9 | 7 5 6 | 34 34 8 |
+------- ...
  Topic: Puzzle 11/08/01: B Advanced (BBDB?)
susume

Replies: 7
Views: 21309

PostForum: Puzzles by daj   Posted: Wed Aug 03, 2011 1:59 am   Subject: Puzzle 11/08/01: B Advanced (BBDB?)
If you combine Marty's first two steps with my last two, it does come out right. My pass through the basics unfortunately included a couple of, ahem, inadvertantly correct placements. Embarassed
  Topic: Puzzle 11/08/01: B Advanced (BBDB?)
susume

Replies: 7
Views: 21309

PostForum: Puzzles by daj   Posted: Tue Aug 02, 2011 5:02 pm   Subject: Puzzle 11/08/01: B Advanced (BBDB?)
I am unable to determine how you concluded that r9c5=2 given a UR18.

Drat, I messed up on the basics. I wish the puzzle would just come out wrong when I do that so I know to start over. Sad
  Topic: Puzzle 11/08/01: B Advanced (BBDB?)
susume

Replies: 7
Views: 21309

PostForum: Puzzles by daj   Posted: Tue Aug 02, 2011 5:32 am   Subject: Puzzle 11/08/01: B Advanced (BBDB?)
My solution doesn't meet the specs for the difficulty level, but I had plenty of fun!

UR 18; r9c5=2
finned X wing (1)r15c39=(1)r6c9; r5c8<>1
anp (37)r1c29=(1)r1c2 - (1=7)r6c2 - r6c9 = (7)r1 ...
  Topic: Puzzle 11/07/29: ~ Advanced
susume

Replies: 5
Views: 16163

PostForum: Puzzles by daj   Posted: Sun Jul 31, 2011 11:49 pm   Subject: Puzzle 11/07/29: ~ Advanced
X wing 5 r47c26; r6c2<>5
XYZ wing 258 pivot r6c3; r6c2<>2
  Topic: Puzzle 11/07/29: B XY
susume

Replies: 4
Views: 15788

PostForum: Puzzles by daj   Posted: Sat Jul 30, 2011 7:36 pm   Subject: Puzzle 11/07/29: B XY
I posted this puzzle as a "fun" XY-level puzzle.

It was certainly fun! As often happens, I found a longish chain instead of a short-and-sweet wing. I guess it counts as an XY chain, if ...
  Topic: Puzzle 11/07/26: ~ XY (difficult!)
susume

Replies: 4
Views: 7893

PostForum: Puzzles by daj   Posted: Fri Jul 29, 2011 3:34 am   Subject: Puzzle 11/07/26: ~ XY (difficult!)
Same target as Peter's, but a different pattern of 3s to get there:
(6)r4c2 = (6-3)r4c7 = r6c9 - r2c9 = (3-7)r2c3 =(7)r2c2; r4c2<>7
  Topic: Puzzle 11/07/21: ~ Advanced
susume

Replies: 10
Views: 12306

PostForum: Puzzles by daj   Posted: Sat Jul 23, 2011 2:53 am   Subject: Puzzle 11/07/21: ~ Advanced
Found several deletions of 1s, but in the end only needed two of them:

XYZ wing 137 pivot r1c2 => r1c3<>1
anp (18=3)r48c2-r8c9=r2c9-(3=1)r2c1 => r1c2<>1

Ted, I learned the ANP ...
  Topic: Puzzle 11/07/19: ~ XY
susume

Replies: 25
Views: 28357

PostForum: Puzzles by daj   Posted: Fri Jul 22, 2011 5:00 pm   Subject: Puzzle 11/07/19: ~ XY
I've only just recently added BUG to my repertoire, so not surprising I missed something basic. Thanks for the reminder.

I googled "quantum" in the sudoku context but didn't find anythin ...
  Topic: Puzzle 11/07/19: ~ XY
susume

Replies: 25
Views: 28357

PostForum: Puzzles by daj   Posted: Fri Jul 22, 2011 4:27 am   Subject: Puzzle 11/07/19: ~ XY
skyscraper (6)r3c9=r3c6-r4c6=r4c7 => r5c9<>6=1
+---------+---------------+--------+
| 4 8 1 | 9 56 56 | 7 3 2 |
| 9 6 7 | 2 14 3 | 8 14 5 |
| 5 2 3 | 14 8 7 | 9 ...
  Topic: Puzzle 11/07/19: ~ Advanced
susume

Replies: 3
Views: 6686

PostForum: Puzzles by daj   Posted: Fri Jul 22, 2011 2:56 am   Subject: Puzzle 11/07/19: ~ Advanced
coloring (or turbot fish or whatever it's called): (3)r4c6=r4c9-r9c9=r8c8 => r8c6<>3=9
After which:
+--------+-----------+--------------+
| 4 2 5 | 6 9 18 | 3 178 78 |
| 9 3 7 | ...
 
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