I have no idea what to call this type of puzzle.
You have a Su-Doku grid with no numbers, just pencilmarks. You then use techniques to find all the numbers which go into the cells.
I think that this produces much harder puzzles than what can be achieved with normal Su-Doku.
For example, all ordinary 4x4 Su-Dokus can be solved with singles only, but not this one I created.
- Code: Select all
1311 3421 3131 2413
1432 4422 1412 2231
4321 1423 2421 3412
1314 4223 3424 4312
(Tip: You can immediately get rid of duplicate and triplicate candidates.)