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Deadly Samurai? http://www.rcbroughton.co.uk/sudoku/forum/viewtopic.php?f=16&t=1470 |
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Author: | Mathimagics [ Thu Jan 17, 2019 5:13 pm ] |
Post subject: | Deadly Samurai? |
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? |
Author: | Mathimagics [ Mon Jan 21, 2019 5:45 pm ] |
Post subject: | Re: Deadly Samurai? |
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 |
Author: | Ed [ Wed Jan 23, 2019 8:07 am ] | ||
Post subject: | Re: Deadly Samurai? | ||
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
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Author: | Mathimagics [ Wed Jan 23, 2019 4:13 pm ] |
Post subject: | Re: Deadly Samurai? |
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! 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! |
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