The New Sudoku Players' Forum

[JPF]

Next move :

Code: Select all

 1 . . | . . . | . . 2
 . . . | 3 . 4 | . . .
 . . 2 | . . . | 5 . .
-------+-------+-------
 . 3 . | . 1 . | . 6 .
 . . . | 7 . 8 | . . .
 . 6 . | . 3 . | . 4 .
-------+-------+-------
 . . 8 | . . . | 1 . .
 . . . | 6 . 9 | . . .
 5 . . | . . . | . . 8      ER=9.1



JPF

[ravel]

This was quick to my last one for the moment:

Code: Select all

 +-------------------+
 | 1 . . . . . . . 9 |
 | . . . 8 . 5 . . . |
 | . . 4 . . . 2 . . |
 | . 5 . . 1 . . 8 . |
 | . . . 2 . 3 . . . |
 | . 8 . . 4 . . 7 . |
 | . . 9 . . . 4 . . |
 | . . . 7 . 6 . . . |
 | 2 . . . . . . . 3 |
 +-------------------+ ER 9.2


[TTHsieh]

to fill gap.

Code: Select all

1 . . | . . . | . . 9
. . . | 3 . 8 | . . .
. . 4 | . . . | 1 . .
- - - + - - - + - - -
. 8 . | . 2 . | . 3 .
. . . | 6 . 1 | . . .
. 3 . | . 9 . | . 7 .
- - - + - - - + - - -
. . 8 | . . . | 6 . .
. . . | 7 . 5 | . . .
9 . . | . . . | . . 4   ER = 7.0



TTHsieh

[ravel]

Very nice puzzle with x-,xy-wings,strong links, UR and 2 of my new favorite semi-remote naked pairs (also y-wing or W-wing) - if you ignore the 7.0 bidirectional cycle.

[TTHsieh]

to fill another gap, it's not easy.

Code: Select all

1 . . | . . . | . . 9
. . . | 9 . 3 | . . .
. . 6 | . . . | 2 . .
- - - + - - - + - - -
. 9 . | . 7 . | . 5 .
. . . | 2 . 4 | . . .
. 3 . | . 1 . | . 7 .
- - - + - - - + - - -
. . 2 | . . . | 6 . .
. . . | 3 . 7 | . . .
4 . . | . . . | . . 1   ER = 8.7



TTHsieh

[TTHsieh]

any other ER? I can't find any more. Here is my collection (25,936 puzzles) and analysis.

Code: Select all

1.5 = 2299,  8.86%      7.0 =    3,  0.01%
1.7 =   39,  0.15%      7.1 = 2728, 10.52%
2.0 = 1891,  7.29%      7.2 = 2084,  8.04%
2.3 =  564,  2.17%      7.3 = 1258,  4.85%
2.5 =  172,  0.66%      7.4 =  144,  0.56%
2.6 =  634,  2.44%      7.6 =   10,  0.04%
2.8 =  344,  1.33%      7.7 =   71,  0.27%
3.0 =   45,  0.17%      7.8 =  305,  1.18%
3.2 =  191,  0.74%      8.2 =   61,  0.24%
3.4 =  283,  1.09%      8.3 = 1504,  5.80%
3.6 =   10,  0.04%      8.4 = 2469,  9.52%
4.2 =  172,  0.66%      8.5 = 1095,  4.22%
4.4 = 1140,  4.40%      8.6 =  298,  1.15%
4.5 =  554,  2.14%      8.7 =    3,  0.01%
4.6 =   45,  0.17%      8.8 =   66,  0.25%
5.6 =   34,  0.13%      8.9 =  803,  3.10%
6.6 = 1692,  6.52%      9.0 = 1741,  6.71%
6.7 =  466,  1.80%      9.1 =  308,  1.19%
6.8 =  201,  0.77%      9.2 =  209,  0.81%   Total 25,936


TTHsieh

[ravel]

Impressive work.

Note that - due to the strong symmetries - only 1284 of the puzzles are non isomorphic. Since the evaluation of the ER ratings is very slow, i use gsf's program to canonicalize them (see here) and sort and uniq to remove duplicates, before i evaluate the ratings. But i dont have an easy way to reconstruct one original to all non isomorphic puzzles (if i need one, i just look for the first line number, where it appears in the canonicalized file).

I did not find any puzzles with new rating. Over the weekend i had 636, but ratings 7.6 and 8.7 are still missing in my collection.

This is my proposal for the new challenge (but there are some hours left for JPF's).

Code: Select all

 +-------------------+
 | . . . . . . . . 3 |
 | . 4 5 . . . . 9 . |
 | 7 . . 8 . . 2 . . |
 | . 3 7 . . 6 . . . |
 | . . . . . . . . . |
 | . . . 2 . . 1 5 . |
 | . . 1 . . 7 . . 5 |
 | . 6 . . . . 8 1 . |
 | 2 . . . . . . . . |
 +-------------------+ ER 1.5


I hope, its not too hard to make some progress.

[JPF]

Impressive work.

Note that - due to the strong symmetries - only 1284 of the puzzles are non isomorphic.

It's exactly what i was about to post.
I got the same ratings, except ER=7.0
Interesting to note that the maximum (9.2 ?) is easy to get, while much easier ones, like 7.0, need a lot of work.

ravel, it's OK for the new challenge.

JPF

[ronk]

This is my proposal for the new challenge (but there are some hours left for JPF's).

If anyone has already collected the submissions to JPF's challenge in line format, would you please post the collection?

TIA, Ron

[TTHsieh]

In order to speed up the game's tempo, I suggested changes the rule:

nobody can post more than 5 puzzles within one week.

nobody can post more than 10 puzzles within one week.

Here is my post.

Code: Select all

. . . | . . . | . . 9
. 6 4 | . . . | . 5 .
7 . . | 8 . . | 4 . .
- - - + - - - + - - -
. 9 7 | . . 3 | . . .
. . . | . . . | . . .
. . . | 5 . . | 1 6 .
- - - + - - - + - - -
. . 2 | . . 7 | . . 4
. 3 . | . . . | 8 1 .
5 . . | . . . | . . .  ER = 3.0



to fill the gap.

Code: Select all

. . . | . . . | . . 9
. 5 7 | . . . | . 1 .
4 . . | 8 . . | 2 . .
- - - + - - - + - - -
. 1 4 | . . 9 | . . .
. . . | . . . | . . .
. . . | 2 . . | 6 7 .
- - - + - - - + - - -
. . 2 | . . 4 | . . 7
. 9 . | . . . | 8 5 .
6 . . | . . . | . . .  ER = 1.2



TTHsieh

[ravel]

Whats the difference between 1.0, 1,2 and 1.5 (all have hidden singles only) ?

Ooh, this already is very quick. Some for the gap:

Code: Select all

 +-------------------+
 | . . . . . . . . 5 |
 | . 5 7 . . . . 4 . |
 | 1 . . 2 . . 3 . . |
 | . 4 6 . . 5 . . . |
 | . . . . . . . . . |
 | . . . 3 . . 2 1 . |
 | . . 9 . . 7 . . 4 |
 | . 6 . . . . 1 8 . |
 | 7 . . . . . . . . |
 +-------------------+ ER 1.7
 +-------------------+
 | . . . . . . . . 5 |
 | . 6 7 . . . . 4 . |
 | 1 . . 2 . . 3 . . |
 | . 5 6 . . 3 . . . |
 | . . . . . . . . . |
 | . . . 8 . . 1 9 . |
 | . . 4 . . 7 . . 6 |
 | . 8 . . . . 2 1 . |
 | 9 . . . . . . . . |
 +-------------------+ ER 2.0
 +-------------------+
 | . . . . . . . . 5 |
 | . 8 7 . . . . 4 . |
 | 1 . . 2 . . 3 . . |
 | . 9 4 . . 5 . . . |
 | . . . . . . . . . |
 | . . . 3 . . 6 1 . |
 | . . 5 . . 4 . . 9 |
 | . 1 . . . . 2 7 . |
 | 2 . . . . . . . . |
 +-------------------+ ER 2.3
 +-------------------+
 | . . . . . . . . 5 |
 | . 8 5 . . . . 4 . |
 | 1 . . 2 . . 3 . . |
 | . 6 8 . . 5 . . . |
 | . . . . . . . . . |
 | . . . 4 . . 2 1 . |
 | . . 9 . . 6 . . 8 |
 | . 5 . . . . 1 9 . |
 | 3 . . . . . . . . |
 +-------------------+ ER 2.6


And a next one.

Code: Select all

 +-------------------+
 | . . . . . . . . 5 |
 | . 9 8 . . . . 4 . |
 | 1 . . 2 . . 3 . . |
 | . 5 9 . . 6 . . . |
 | . . . . . . . . . |
 | . . . 4 . . 1 2 . |
 | . . 5 . . 7 . . 9 |
 | . 6 . . . . 4 1 . |
 | 4 . . . . . . . . |
 +-------------------+ ER 3.4


[TTHsieh]

my new post.

Code: Select all

. . . | . . . | . . 9
. 5 7 | . . . | . 4 .
4 . . | 3 . . | 2 . .
- - - + - - - + - - -
. 9 4 | . . 5 | . . .
. . . | . . . | . . .
. . . | 2 . . | 8 7 .
- - - + - - - + - - -
. . 5 | . . 4 | . . 7
. 1 . | . . . | 3 2 .
2 . . | . . . | . . .  ER = 4.6



and fill the gap.

Code: Select all

. . . | . . . | . . 9
. 6 4 | . . . | . 5 .
7 . . | 8 . . | 4 . .
- - - + - - - + - - -
. 9 7 | . . 3 | . . .
. . . | . . . | . . .
. . . | 5 . . | 1 6 .
- - - + - - - + - - -
. . 2 | . . 7 | . . 4
. 3 . | . . . | 8 1 .
5 . . | . . . | . . .  ER = 3.0



TTHsieh

[JPF]

only to fill in the gaps :

Code: Select all

 *-----------*
 |...|...|..1|
 |.23|...|.4.|
 |5..|6..|2..|
 |---+---+---|
 |.37|..4|...|
 |...|...|...|
 |...|8..|65.|
 |---+---+---|
 |..9|..7|..3|
 |.4.|...|91.|
 |1..|...|...|
 *-----------*    ER=2.5

 *-----------*
 |...|...|..1|
 |.23|...|.4.|
 |5..|6..|2..|
 |---+---+---|
 |.71|..8|...|
 |...|...|...|
 |...|3..|65.|
 |---+---+---|
 |..9|..1|..7|
 |.3.|...|59.|
 |2..|...|...|
 *-----------*    ER=2.8

 *-----------*
 |...|...|..1|
 |.23|...|.4.|
 |5..|1..|6..|
 |---+---+---|
 |.37|..8|...|
 |...|...|...|
 |...|6..|15.|
 |---+---+---|
 |..5|..7|..3|
 |.8.|...|29.|
 |2..|...|...|
 *-----------*    ER=3.2

 *-----------*
 |...|...|..1|
 |.23|...|.4.|
 |4..|5..|2..|
 |---+---+---|
 |.36|..7|...|
 |...|...|...|
 |...|4..|52.|
 |---+---+---|
 |..8|..6|..3|
 |.1.|...|78.|
 |5..|...|...|
 *-----------*    ER=4.2

 *-----------*
 |...|...|..1|
 |.23|...|.4.|
 |5..|6..|7..|
 |---+---+---|
 |.38|..9|...|
 |...|...|...|
 |...|4..|65.|
 |---+---+---|
 |..6|..8|..3|
 |.9.|...|12.|
 |2..|...|...|
 *-----------*    ER=4.4

 *-----------*
 |...|...|..1|
 |.23|...|.4.|
 |5..|2..|6..|
 |---+---+---|
 |.37|..8|...|
 |...|...|...|
 |...|1..|25.|
 |---+---+---|
 |..8|..7|..3|
 |.4.|...|18.|
 |6..|...|...|
 *-----------*    ER=4.5



JPF

[TTHsieh]

also to fill in the gaps :

Code: Select all

. . . | . . . | . . 9
. 4 7 | . . . | . 5 .
6 . . | 8 . . | 3 . .
- - - + - - - + - - -
. 7 1 | . . 5 | . . .
. . . | . . . | . . .
. . . | 3 . . | 4 6 .
- - - + - - - + - - -
. . 5 | . . 1 | . . 7
. 8 . | . . . | 2 9 .
4 . . | . . . | . . .  ER = 3.6


. . . | . . . | . . 9
. 5 7 | . . . | . 2 .
6 . . | 8 . . | 5 . .
- - - + - - - + - - -
. 7 1 | . . 4 | . . .
. . . | . . . | . . .
. . . | 5 . . | 2 6 .
- - - + - - - + - - -
. . 9 | . . 1 | . . 7
. 8 . | . . . | 6 3 .
5 . . | . . . | . . .  ER = 3.8



another new post.

Code: Select all

. . . | . . . | . . 9
. 4 5 | . . . | . 1 .
8 . . | 3 . . | 2 . .
- - - + - - - + - - -
. 9 1 | . . 4 | . . .
. . . | . . . | . . .
. . . | 8 . . | 3 7 .
- - - + - - - + - - -
. . 2 | . . 9 | . . 1
. 7 . | . . . | 8 3 .
4 . . | . . . | . . .  ER = 5.6



TTHsieh

[JPF]

Difficult to find something between 4.6 and 5.6

Here is an other 5.6 :

Code: Select all

 *-----------*
 |...|...|..1|
 |.23|...|.4.|
 |5..|6..|7..|
 |---+---+---|
 |.14|..3|...|
 |...|...|...|
 |...|5..|68.|
 |---+---+---|
 |..1|..2|..4|
 |.9.|...|57.|
 |7..|...|...|
 *-----------*    ER=5.6


Next proposed move :

Code: Select all

 . . . | . . . | . . 1
 . 2 3 | . . . | . 4 .
 5 . . | 6 . . | 2 . .
-------+-------+-------
 . 7 1 | . . 4 | . . .
 . . . | . . . | . . .
 . . . | 2 . . | 6 5 .
-------+-------+-------
 . . 4 | . . 8 | . . 3
 . 9 . | . . . | 5 7 .
 7 . . | . . . | . . .    ER=5.7



JPF