The New Sudoku Players' Forum

[vidarino]

OK, this little puppy jumped into my lap right after I switched things around, and it seemed to stay there even after I tested by switching back... ;-)

Code: Select all

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

Edit: and one more:

Code: Select all

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

[ab]

Testing Vidar's latest:

#3 solves with a single X-Wing, no subsets.

But as they require X-Wings, all of them are superior! 75 down....

Ruud.

if 1 x wing is good enough I have some more candidates. Two also need locked candidates.

Code: Select all

...|..4|8..
.58|3..|.2.
4..|...|.9.
-----------
9..|.41|.6.
...|9.3|...
.4.|52.|..9
-----------
.7.|...|..5
.8.|..9|41.
..2|4..|...

..9|8.6|1..
..8|.5.|...
4..|7.2|..3
-----------
6..|...|..7
..5|...|8..
2..|...|..4
-----------
7..|4.3|..9
...|.6.|7..
..3|2.5|4..

...|3..|...
..2|.4.|6..
6..|8.5|..9
-----------
9..|...|..8
.15|.8.|42.
3..|...|..6
-----------
8..|5.3|..7
..6|.7.|9..
...|..6|...


[Ruud]

I like to contribute this sudoku:

Code: Select all

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

It requires a hidden triple and 2 pairs, so it qualifies.

But try to solve this manually. You'll be amazed how narrow the solving path is. An interesting twist maybe for our remaining superiors.

Ruud.

[ab]

I like to contribute this sudoku:

Code: Select all

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

It requires a hidden triple and 2 pairs, so it qualifies.

Ruud.

Can be solved with pairs and locked candidates!

[tarek]

I'll be posting the rankings shortly, I've revised the formula as follows reducing some of the bias toward the hidden triple:

Code: Select all

Hidden Triple*6+XWing*3+Naked triple*2+Hidden double*2+Naked double

The minimum for entry was a score of 3, but as the thread progressed the bab should rise slightly, I'm setting it at 4 now for entry, therefore the following puzzles that were posted since my last update will not make the list (although superiors):Vidar's #1, Ruud's #2, vidar's #3

I was impressed, as many others would be by vidar's #4, it has EVERYTHING, & will definitely score highly in the rankings.


ab,
The 3rd of your puzzles is missing a line.

Tarek

[ab]

I was impressed, as many others would be by vidar's #4, it has EVERYTHING, & will definitely score highly in the rankings.


ab,
The 3rd of your puzzles is missing a line.

Tarek

Whoops sorry, I've fixed that.

vidarino's latest puzzles are indeed excellent (#77 and #78 on the new list).

OK, this little puppy jumped into my lap right after I switched things around, and it seemed to stay there even after I tested by switching back... ;-)

I'm sure we'd all love to know what he switched around

[tarek]

just a correction, I just made a small miscalculation, as you puzzles only needed an x-wing ab, the score would be 3 which is below the bar at the moment as we pass the 75 mar so all 3 will not join the list as will Vidar's #3.

One more from me....

Code: Select all

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

Tarek

[tarek]

Rankings to 76....

Code: Select all

Superior thread puzzle rankings:

001  Puzzle#074 (vidarino)
002  Puzzle#075 (vidarino)
003  Puzzle#067 (vidarino/ab)
004  Puzzle#031 (henk)
005  Puzzle#066 (vidarino)
006  Puzzle#050 (gsf)
007  Puzzle#007 (vidarino)
008  Puzzle#013 (henk)
009  Puzzle#005 (ab)
010  Puzzle#008 (vidarino)
011  Puzzle#076 (tarek)
012  Puzzle#043 (vidarino)
013  Puzzle#073 (Ruud)
014  Puzzle#061 (tarek)
015  Puzzle#058 (vidarino)
016  Puzzle#070 (Red Ed)
017  Puzzle#010 (Ruud)
018  Puzzle#060 (tarek)
019  Puzzle#033 (vidarino)
020  Puzzle#049 (gsf)
021  Puzzle#032 (henk)
022  Puzzle#057 (vidarino)
023  Puzzle#048 (gsf)
024  Puzzle#038 (ab)
025  Puzzle#009 (Ruud)
026  Puzzle#063 (ab)
027  Puzzle#029 (vidarino)
028  Puzzle#019 (vidarino)
029  Puzzle#035 (tarek)
030  Puzzle#040 (ab)
031  Puzzle#039 (Ruud)
032  Puzzle#051 (Ruud)
033  Puzzle#055 (Ruud)
034  Puzzle#064 (ab)
035  Puzzle#044 (vidarino)
036  Puzzle#071 (Ruud)
037  Puzzle#068 (Red Ed)
038  Puzzle#027 (henk)
039  Puzzle#016 (henk)
040  Puzzle#017 (ab)
041  Puzzle#026 (henk)
042  Puzzle#037 (Ocean)
043  Puzzle#004 (ab/tarek)
044  Puzzle#003 (tarek/ab)
045  Puzzle#054 (Ruud)
046  Puzzle#034 (vidarino)
047  Puzzle#062 (Ruud)
048  Puzzle#041 (vidarino)
049  Puzzle#018 (ab)
050  Puzzle#011 (gsf)
051  Puzzle#036 (Ruud)
052  Puzzle#002 (Ruud)
053  Puzzle#024 (Mage)
054  Puzzle#022 (Ruud)
055  Puzzle#006 (vidarino)
056  Puzzle#030 (vidarino)
057  Puzzle#012 (gsf)
058  Puzzle#069 (Red Ed)
059  Puzzle#028 (henk)
060  Puzzle#014 (henk)
061  Puzzle#065 (henk)
062  Puzzle#056 (vidarino)
063  Puzzle#052 (vidarino)
064  Puzzle#025 (ab)
065  Puzzle#053 (henk)
066  Puzzle#042 (vidarino)
067  Puzzle#015 (henk)
068  Puzzle#020 (vidarino)
069  Puzzle#047 (vidarino)
070  Puzzle#046 (vidarino)
071  Puzzle#045 (vidarino)
072  Puzzle#059 (henk)
073  Puzzle#023 (Ruud)
074  Puzzle#001 (tarek)
075  Puzzle#072 (Ruud)
076  Puzzle#021 (Ruud)


Code: Select all

Triples Challenge

001   Puzzle#074 (vidarino)
002   Puzzle#067 (vidarino/ab)
003   Puzzle#075 (vidarino)
004   Puzzle#031 (henk)
005   Puzzle#066 (vidarino)

Code: Select all

X-wing challenge

001   Puzzle#050 (gsf)
002   Puzzle#031 (henk)
003   Puzzle#075 (vidarino)
004   Puzzle#074 (vidarino)
005   Puzzle#058 (vidarino)

Puzzle #21 apparantly slipped the net, as it scores only 2....Your next entry Ruud making the list would replace puzzle #21

Tarek

[ab]

just a correction, I just made a small miscalculation, as you puzzles only needed an x-wing ab, the score would be 3 which is below the bar at the moment
Tarek

no problem. As you could tell from the tone of my post, I was surprised that they qualified.

[Ruud]

Here is the replacement for #21:

Code: Select all

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

I found an X-Wing, a hidden pair and 2 hidden triples. At least one of the hidden triples is required.

Ruud.

[Ocean]

Here are some candidates:

Code: Select all

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

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

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

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

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

[Ocean]

I think this one contains a hidden triple, in addition to the x-wing.

Code: Select all

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

This should have two x-wings, a hidden double and to doubles.

Code: Select all

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

Also two x-wings:

Code: Select all

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

This one might have 2 naked triples, in addition to several doubles, plus an x-wing.

Code: Select all

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

An x-wing, plus a little bit extra.

Code: Select all

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

[Red Ed]

I think this one contains a hidden triple, in addition to the x-wing.

Only the x-wing is required to solve.

This one might have 2 naked triples, in addition to several doubles, plus an x-wing.

The triples aren't needed, though the x-wing is.

Puzzles that require at least 2 triples to be resolved seem remarkably hard to find. I don't think there are any examples in tarek's list that require 2 hidden triples, for example.

[vidarino]

Here are three more from me, which, unless I'm mistaken, all require at least one hidden triple (I find two in each the first two, but I haven't checked if both are required) + an X-Wing or two;

Code: Select all

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

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

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

Feel free to scrap my three lowest ranking ones to make room for these, if they measure up.

Vidar

[Red Ed]

Wow -- that neatly debunks my previous statement: your first grid is the only example so far of a puzzle that needs 2 hidden triples to be resolved. Oh, and an x-wing.