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Ninja Sudoku http://www.rcbroughton.co.uk/sudoku/forum/viewtopic.php?f=4&t=847 |
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Author: | simon_blow_snow [ Sat Nov 20, 2010 12:33 pm ] |
Post subject: | Ninja Sudoku |
Don't mistake this Gattai variant with Kazagurama, which has a similar shape. This one is much more tightly packed. In fact, it can fit on a 19x19 square board, the minimum anyone can do with 4 non-overlapping 9x9 grids and 1 overlapped 9x9 central grid. Note the central grid overlaps each of the 4 outside grids on 20 cells (roughly 1/4 of the total area), so there is only 1 cell on the central grid which is not overlapped, the absolute minimum with 4 non-overlapping outside grids. (As for the name, both Ninja and Samurai are historic roles/occupations in Japan, and both these 2 variants consist of 5 subgrids, with 1 central grid overlapping 4 outside grids.) Ninja Sudoku Note all 5 subgrids are Ninjutsudoku grids. You can find information about the Ninjutsudoku variant in here. |
Author: | simon_blow_snow [ Sat Nov 20, 2010 12:39 pm ] |
Post subject: | Re: Ninja Sudoku |
Here is a puzzle with 8 initial givens (out of 325 cells!): Ninja Sudoku #1 I will not say this puzzle is "human solvable". But I will say it is "ninja solvable", so if you think you have the sudoku solving skills better than normal players as a ninja would have over normal humans, please feel free to attack it. I will release the solution, and perhaps the solving method, later. |
Author: | enxio27 [ Sat Nov 20, 2010 9:24 pm ] |
Post subject: | Re: Ninja Sudoku |
Probably beyond my skills, but I would love to try an easier one if someone can find or make one. |
Author: | simon_blow_snow [ Mon Nov 22, 2010 1:10 pm ] |
Post subject: | Re: Ninja Sudoku |
Just for enxio27, here is a highly human solvable (HHS) puzzle. I just dropped many extra constraints, leaving only the bloom petals and nothing else (so the puzzle is made up of 5 Bloomdoku grids). Instead there are lots of initial givens, so the puzzle is probably shamelessly non-minimal. To distinguish this one with the original, more restrained "Ninja" variant, I decide to name this one "Kunoichi Sudoku". Google the word if you want to know the meaning. Kunoichi Sudoku #1 An error was made when creating this puzzle, causing it to have 4 solutions. To obtain a unique solution, add the following condition: G1 (top-left) R6C4 = G5 (bottom-right) R4C6 = 5 text representation: line codes for the 4 outside 9x9 subgrids: text solution: |
Author: | HATMAN [ Wed Nov 24, 2010 9:21 am ] |
Post subject: | Re: Ninja Sudoku |
Excellent packing Simon |
Author: | enxio27 [ Wed Nov 24, 2010 3:13 pm ] |
Post subject: | Re: Ninja Sudoku |
simon_blow_snow wrote: Just for enxio27, here is a highly human solvable (HHS) puzzle. Thank you so much! I'm taking it with me on my Thanksgiving holiday trip. Quote: To distinguish this one with the original, more restrained "Ninja" variant, I decide to name this one "Kunoichi Sudoku". Google the word if you want to know the meaning. Goes well with my avatar, don't you think? |
Author: | HATMAN [ Sat Nov 27, 2010 8:03 pm ] |
Post subject: | Re: Ninja Sudoku |
Indeed it does |
Author: | enxio27 [ Tue Nov 30, 2010 4:50 am ] |
Post subject: | Re: Ninja Sudoku |
I've gotten the Kunoichi as far as working out all of the pencil marks. It was a little easier than I expected, but I tried a different method this time that will hopefully eliminate exasperating mistakes. Here are the pencil marks for the five grids, if someone is willing to double-check them for me: Grid #1: Code: .-------------------------------.-------------------------------.-------------------------------. | 2 479 6 | 478 1 4789 | 3 49 5 | | 48 1 489 | 3 24689 5 | 2469 7 2469 | | 3 4579 4579 | 2467 24679 24679 | 12469 12469 8 | :-------------------------------+-------------------------------+-------------------------------: | 1458 2 145789 | 145678 456789 146789 | 456789 3 4679 | | 6 4579 45789 | 24578 2345789 24789 | 245789 24589 1 | | 1458 3 145789 | 1245678 2456789 1246789 | 2456789 245689 24679 | :-------------------------------+-------------------------------+-------------------------------: | 7 456 1245 | 124568 234568 123468 | 1245689 1245689 23469 | | 145 8 1245 | 9 234567 123467 | 124567 12456 23467 | | 9 456 3 | 1245678 245678 124678 | 1245678 124568 2467 | '-------------------------------.-------------------------------.-------------------------------' Grid #2: Code: .-------------------------------.-------------------------------.-------------------------------. | 4 1357 8 | 1357 9 1357 | 2 3 6 | | 357 9 357 | 2 3457 6 | 3458 1 348 | | 2 1356 1356 | 13458 1345 13458 | 3458 349 7 | :-------------------------------+-------------------------------+-------------------------------: | 1356789 4 135679 | 1356789 13567 135789 | 13678 2 138 | | 135678 1235678 123567 | 1345678 1234567 134578 | 134678 3467 9 | | 136789 123678 123679 | 1346789 13467 134789 | 134678 5 1348 | :-------------------------------+-------------------------------+-------------------------------: | 1356789 135678 1345679 | 1345679 134567 134579 | 13467 3467 2 | | 135679 13567 1345679 | 1345679 134567 2 | 13467 8 134 | | 1367 12367 123467 | 13467 8 1347 | 9 3467 5 | '-------------------------------.-------------------------------.-------------------------------' Grid #3: Code: .-------------------------------.-------------------------------.-------------------------------. | 2456789 1246789 2456789 | 245689 24679 135678 | 1235678 123567 1345678 | | 234568 123468 1245689 | 1245689 23469 136789 | 123678 123679 1346789 | | 234567 123467 124567 | 12456 234567 1356789 | 135678 1345679 1345679 | :-------------------------------+-------------------------------+-------------------------------: | 245678 124678 1245678 | 124568 2467 135679 | 13567 1345679 1345679 | | 34679 346789 34789 | 3479 123456789 1367 | 12367 123467 13467 | | 1345679 1345679 34579 | 134579 3468 245689 | 2345689 234689 234568 | :-------------------------------+-------------------------------+-------------------------------: | 1345679 1345679 234579 | 1234579 34678 45689 | 345689 346789 345678 | | 1234679 134789 234789 | 123479 14678 1245689 | 1245689 246789 245678 | | 2345679 345789 2345789 | 234579 13468 124568 | 1234568 1234689 1234568 | '-------------------------------.-------------------------------.-------------------------------' Grid #4: Code: .-------------------------------.-------------------------------.-------------------------------. | 5 3467 1 | 3679 2 34679 | 346789 34789 3479 | | 679 2 34679 | 8 345679 1345679 | 1345679 34579 134579 | | 8 3467 34679 | 135679 345679 1345679 | 1345679 234579 1234579 | :-------------------------------+-------------------------------+-------------------------------: | 2679 5 234679 | 123679 34679 1234679 | 134789 234789 123479 | | 1 3467 234679 | 235679 3456789 2345679 | 345789 2345789 234579 | | 279 8 23479 | 123579 34579 1234579 | 134579 6 1234579 | :-------------------------------+-------------------------------+-------------------------------: | 3 167 2567 | 25679 5679 25679 | 4579 4579 8 | | 267 9 2567 | 4 3567 8 | 357 1 357 | | 4 7 8 | 3579 1 3579 | 2 3579 6 | '-------------------------------.-------------------------------.-------------------------------' Grid #5: Code: .-------------------------------.-------------------------------.-------------------------------. | 3468 245689 2345689 | 234689 234568 2345689 | 7 456 1 | | 34678 45689 345689 | 346789 345678 1 | 5689 2 569 | | 14678 1245689 1245689 | 246789 245678 245689 | 5689 456 3 | :-------------------------------+-------------------------------+-------------------------------: | 13468 124568 1234568 | 1234689 1234568 2345689 | 123569 7 2569 | | 9 12568 123568 | 12368 1235678 23568 | 12356 1356 4 | | 1346 7 123456 | 123469 123456 234569 | 123569 8 2569 | :-------------------------------+-------------------------------+-------------------------------: | 2 14689 14689 | 13468 13468 3468 | 1356 1356 7 | | 1468 3 1468 | 5 12468 7 | 126 9 26 | | 5 16 7 | 1236 9 236 | 4 136 8 | '-------------------------------.-------------------------------.-------------------------------' Now, onward to solving! |
Author: | simon_blow_snow [ Tue Nov 30, 2010 1:15 pm ] |
Post subject: | Re: Ninja Sudoku |
Good work enxio27. The pencilmarks look alright to me. I was half expecting you to actually solve this "on paper". |
Author: | enxio27 [ Tue Nov 30, 2010 2:52 pm ] |
Post subject: | Re: Ninja Sudoku |
simon_blow_snow wrote: Good work enxio27. The pencilmarks look alright to me. I was half expecting you to actually solve this "on paper". I do solve it "on paper", but I think it's more than I can manage without pencil marks. I use SudokuSolver or JSudoku to help with the pencil marks, because otherwise I end up making too many mistakes on the pencil marks before I ever start solving. That takes all the fun out of sudoku for me. |
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