SudokuSolver Forum

A forum for Sudoku enthusiasts to share puzzles, techniques and software
It is currently Mon Jun 17, 2019 11:42 am

All times are UTC




Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: Deadly Samurai?
PostPosted: Thu Jan 17, 2019 5:13 pm 
Offline
Addict
Addict

Joined: Sat Jan 05, 2019 1:02 pm
Posts: 38
I would be curious to know whether anybody can rate this minimal, very low singles count, Samurai-X puzzle.

It was found by Mike Metcalf at the Players forum:

Code:
A: ...................................7.............................................
B: ......52.8.1.........9.....41......535..8..9.......6...............97......41....
C: ..7..........4.82..9.......4.6.........182........5..........5......69...........
D: ....3.......9........5....76...7........634...23.........15...2..2......7...9...5
E: .....7.....5..........92...5...............7.......398..7..................8.4.5.

A is the centre grid, B, C, D, E the corner grids, B = top left, C = top-right, D = bottom-right, E = bottom-left.

Note the single clue in the central grid!

Not a Killer, but lethal? :?:


Top
 Profile  
Reply with quote  
 Post subject: Re: Deadly Samurai?
PostPosted: Mon Jan 21, 2019 5:45 pm 
Offline
Addict
Addict

Joined: Sat Jan 05, 2019 1:02 pm
Posts: 38
Here is the same puzzle in the correct format for pasting into Richard Broughton's Sudoku Solver:
Code:
......52.8.1.........9.....41......535..8..9.......6...............97......41....
..7..........4.82..9.......4.6.........182........5..........5......69...........
...................................7.............................................
.....7.....5..........92...5...............7.......398..7..................8.4.5.
....3.......9........5....76...7........634...23.........15...2..2......7...9...5


Top
 Profile  
Reply with quote  
 Post subject: Re: Deadly Samurai?
PostPosted: Wed Jan 23, 2019 8:07 am 
Offline
Grand Master
Grand Master

Joined: Wed Apr 16, 2008 1:16 am
Posts: 806
Location: Sydney, Australia
JSudoku can't get very far. SudokuSolver does better but with lots of "Bowman's Bingo". It gets out the bottom right grid and parts of the others but then grinds to a holt. Have attached the SudokuSolver file for the puzzle at the end point. You can inspect the log if you like!

Cheers
Ed


Attachments:
SamDeadly.ssv [162.99 KiB]
Downloaded 33 times
Top
 Profile  
Reply with quote  
 Post subject: Re: Deadly Samurai?
PostPosted: Wed Jan 23, 2019 4:13 pm 
Offline
Addict
Addict

Joined: Sat Jan 05, 2019 1:02 pm
Posts: 38
Thanks Ed!

It is interesting that those solvers cannot actually complete the puzzle successfully.

It was confirmed as a minimal puzzle by a few of us, me with a DLX solver, others with SAT solvers.

It's certainly no P&P case, that is for certain, but only takes a few seconds for our solvers …

Cheers! 8-)

PS: These are simply observations, of course. I understand that neither SudokuSolver nor JSudoku is in any way designed to handle puzzles like this. And of course a DLX solver can't tell you anything useful about the puzzle that would help a human solver!


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group