The New Sudoku Players' Forum

by ab » Thu Apr 06, 2006 12:43 am

another 20 step puzzle:

Code: Select all: ...|9.7|8.1 ...|...|... ...|5.1|7.9 ----------- 4.2|8..|6.7 ...|...|... 3.5|..9|1.8 ----------- 5.4|6.2|... ...|...|... 7.8|4.3|...

by **JPF** » Fri Apr 07, 2006 9:01 am

a brand-new 1-stepper with 40 clues,
somme symmetry, but not symmetrically minimal.

Code: Select all: 3 2 6 | . 8 7 | 4 . . . 7 . | . . . | 8 9 2 5 8 . | . 4 1 | . . . -------+-------+------- . 3 . | 7 . 6 | . . 1 4 . 1 | . . . | 7 . 9 2 . . | 4 . 5 | . 3 . -------+-------+------- . . . | 6 5 . | . 2 4 9 5 2 | . . . | . 8 . . . 8 | 1 2 . | 5 7 3

It should contain lots of minimal n-steppers like these :

14-stepper : 6,6,4,4,3,1,1,3,3,4,9,7,4,2
24 clues - minimal

Code: Select all: . 2 6 | . 8 7 | 4 . . . 7 . | . . . | 8 9 . 5 8 . | . . . | . . . -------+-------+------- . 3 . | . . 6 | . . 1 4 . . | . . . | . . . 2 . . | 4 . 5 | . 3 . -------+-------+------- . . . | 6 . . | . . . 9 . . | . . . | . 8 . . . . | . 2 . | 5 . 3

15-stepper : 7,3,2,2,1,3,5,4,5,9,2,3,4,4,1
26 clues - symmetrically minimal

Code: Select all: . 2 6 | . 8 . | 4 . . . 7 . | . . . | . 9 . . . . | . 4 1 | . . . -------+-------+------- . 3 . | 7 . . | . . 1 4 . 1 | . . . | 7 . 9 2 . . | . . 5 | . 3 . -------+-------+------- . . . | 6 5 . | . . . . 5 . | . . . | . 8 . . . 8 | . 2 . | 5 7 .

JPF

by **Ruud** » Sat Apr 08, 2006 4:56 pm

Tons of puzzles generated...

and all I could find was this 26-stepper

Code: Select all: . . .|. . .|. 1 2 . . 7|2 . 6|. . . . . .|9 . .|4 . 3 -----+-----+----- 1 . 5|. . .|9 . . . . .|. 7 .|. . . . . 2|. . .|8 . 6 -----+-----+----- 3 . 4|. . 8|. . . . . .|4 . 9|1 . . 6 9 .|. . .|. . .

Ruud.

by ab » Sat Apr 08, 2006 6:26 pm

Ruud wrote:Tons of puzzles generated...

and all I could find was this 26-stepper

Ruud.

Most of us mere mortals would be happy to find anything approaching a 26 stepper. I've not found anything better than 20 steps.

by ab » Sat Apr 08, 2006 8:30 pm

Today's Guardian puzzle was a 20 stepper:
http://image.guardian.co.uk/sys-files/Guardian/documents/2006/03/28/GdnSudoku287_060408.indd.pdf

by **Ocean** » Sat Apr 08, 2006 8:50 pm

ab wrote:Today's Guardian puzzle was a 20 stepper:
http://image.guardian.co.uk/sys-files/Guardian/documents/2006/03/28/GdnSudoku287_060408.indd.pdf

Interesting. (Do you think they read your thread...?)

Here is a fully symmetric 22-stepper:

Code: Select all: . . . | 9 . 6 | . . . . . 1 | . 3 . | 6 . . . 4 . | . 1 . | . 8 . -------+-------+------ 4 . . | . . . | . . 2 . 7 6 | . . . | 9 5 . 5 . . | . . . | . . 8 -------+-------+------ . 5 . | . 7 . | . 4 . . . 3 | . 9 . | 1 . . . . . | 3 . 8 | . . .

by **fermat** » Sun Apr 09, 2006 4:01 am

I would like to have a collection of very easy puzzles.

It seems that there is lack of interest, or the rules may be too restrictive.

Can we lower the requirements perhaps?

by **fermat** » Sun Apr 09, 2006 4:05 am

ab wrote:Ruud also posted a whopping 293 contenders.

Stuff like this. I want that, the 293 contenders.
Where are they posted?

by **Ocean** » Sun Apr 09, 2006 10:52 am

fermat wrote:
ab wrote:Ruud also posted a whopping 293 contenders.

Stuff like this. I want that, the 293 contenders.
Where are they posted?

You can find Ruud's collection on page 3 in this thread. (But they are not necessarily 'easy').
.

fermat wrote:I would like to have a collection of very easy puzzles.

For the 'very easy' ones: These are about the easiest you can get:

Code: Select all: # # - Ten one-steppers: # 076205340209407608510603029652000137000000000387000964160304092703908406098102570 096108240802706103130204065265000489000000000978000316720405038601903704054807920 081502670607309805520607043278000316000000000413000957150406038806701504094805260 017209350908501204620803091192000875000000000546000913250407036704306509061902480 092107350805309602160502097928000134000000000634000785780203046306708901059406870 390215064204603805060704090936000578800000001152000436080902050405107609710568043 052804960108509704490601035731000258000000000546000193820107049904203607073408510 083705920506901803790803056218000749000000000475000361950604038607102405024309610 001867500087201940650409087943000721200000005875000364730506018068103270004798600 018409370205306108740801095482000936000000000356000781120705069807902503039108420 # # - 30 two-steppers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even three-steppers: # 970000063100070008000205000005802600020000010006903400000109000500040009860000041 060103050340080092000000000100602003070000040900305008000000000580020037030406010 860000025200010008000708000003070800050603040007050600000905000100030009520000086 002000500000261000407000906020705010080000050090104080905000708000937000006000200 000629000072000180050000060900102004100000008700804005080000030037000290000531000 020000060350010047000906000005309800080000070001502400000107000970040085060000090 008040300000905000605000701020103060900000007050207040309000104000802000006010800 # #

by **fermat** » Sun Apr 09, 2006 9:00 pm

Thanks Ocean!

by **tarek** » Tue Apr 11, 2006 7:44 pm

a 22 stepper

Code: Select all: . . . | . . . | . . 7 . 1 8 | 5 9 . | . . . . 2 . | . 3 . | 9 5 . -------+-------+------ . . 5 | 4 . . | . . . 3 . . | . 7 . | . . 4 . . . | . . 3 | 1 . . -------+-------+------ . 6 7 | . 4 . | . 9 . . . . | . 8 1 | 2 6 . 5 . . | . . . | . . .

tarek

by **tarek** » Wed Apr 12, 2006 7:46 pm

if minimality is not an issue...

this 43-cell 1 stepper

Code: Select all: 5 7 . | . . 8 | . 9 . 4 . 8 | 9 6 1 | 5 7 . 6 3 9 | 4 . . | . . . -------+-------+------ . 6 5 | 3 2 . | 8 . . 1 . . | . 5 . | . . 4 . . 7 | . 8 9 | 3 6 . -------+-------+------ . . . | . . 3 | 2 4 8 . 9 2 | 8 4 7 | 6 . 1 . 5 . | 6 . . | . 3 9

contains this 35-cell 2 stepper

Code: Select all: 5 7 . | . . . | . 9 . 4 . 8 | 9 6 1 | . . . 6 3 9 | 4 . . | . . . -------+-------+------ . . 5 | 3 2 . | 8 . . 1 . . | . 5 . | . . 4 . . 7 | . 8 9 | 3 . . -------+-------+------ . . . | . . 3 | 2 4 8 . . . | 8 4 7 | 6 . 1 . 5 . | . . . | . 3 9

and this 29-cell 3 stepper

Code: Select all: . 7 . | . . . | . 9 . 4 . 8 | 9 6 1 | . . . 6 2 . | . . . | . . . -------+-------+------ . . 5 | 3 2 . | 8 . . 1 . . | . 5 . | . . 4 . . 7 | . 8 9 | 3 . . -------+-------+------ . . . | . . . | . 4 8 . . . | 8 4 7 | 6 . 1 . 5 . | . . . | . 3 .

tarek

by ab » Sun Apr 16, 2006 1:56 am

I found a 21 step puzzle:

Code: Select all: ...|...|1.. ...|..7|9.. 75.|.86|... ----------- .34|...|... ..6|...|7.. ...|...|86. ----------- ...|24.|.53 ..1|5..|... ..2|...|...

by **JPF** » Sun Apr 16, 2006 9:14 am

Some 22 steppers :

25 clues ; symmetrically minimal

Code: Select all: . . 2 | . . . | . . 7 6 . 4 | . . . | . 1 . . 3 . | . . 6 | 5 4 . -------+-------+------- . . . | 8 . . | . . . 8 . 1 | . 2 . | 9 . 4 . . . | . . 9 | . . . -------+-------+------- . 2 8 | 5 . . | . 3 . . 6 . | . . . | 7 . 9 5 . . | . . . | 2 . .

28 clues ; symmetrically minimal

Code: Select all: . 5 . | 9 3 . | . . 6 . 8 9 | . . 2 | . 7 . 4 . . | . 8 7 | . . . -------+-------+------- . . . | . . . | . . 5 . . 4 | 2 . 9 | 1 . . 1 . . | . . . | . . . -------+-------+------- . . . | 1 2 . | . . 4 . 1 . | 4 . . | 6 5 . 8 . . | . 9 5 | . 2 .

JPF

by **JPF** » Mon Apr 17, 2006 7:08 am

to bridge the gap between high and low steppers

(and if symmetry is not an issue...)

this 1 stepper, 40 clues with some symmetry (previously posted)

Code: Select all: 3 2 6 | . 8 7 | 4 . . . 7 . | . . . | 8 9 2 5 8 . | . 4 1 | . . . -------+-------+------- . 3 . | 7 . 6 | . . 1 4 . 1 | . . . | 7 . 9 2 . . | 4 . 5 | . 3 . -------+-------+------- . . . | 6 5 . | . 2 4 9 5 2 | . . . | . 8 . . . 8 | 1 2 . | 5 7 3

contains :

this 21 stepper, 22 clues, minimal.

Code: Select all: 3 . 6 | . . 7 | . . . . 7 . | . . . | 8 . . . 8 . | . 4 . | . . . -------+-------+------- . . . | 7 . 6 | . . 1 4 . 1 | . . . | . . 9 2 . . | . . 5 | . 3 . -------+-------+------- . . . | 6 . . | . . 4 9 . 2 | . . . | . 8 . . . . | . . . | 5 . .

and some minimal 20 steppers.
Here is one, 23 clues :

Code: Select all: 3 . . | . 8 . | . . . . 7 . | . . . | . 9 2 5 8 . | . 4 1 | . . . -------+-------+------- . 3 . | . . . | . . 1 4 . . | . . . | 7 . . . . . | 4 . . | . 3 . -------+-------+------- . . . | 6 5 . | . . . 9 . 2 | . . . | . 8 . . . . | 1 2 . | 5 . .

JPF

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