Allan Has started but not yet finished this puzzle
Hi everybody,
Can this be solved without guessing?
Posted 14th Mar 2025 at 15:19
Elisabeth Daily subscriber Rated puzzle: HardCompletion time: 1:12:49Used 'check puzzle' when incorrect
I had to use 'trial and error' once
Posted 14th Mar 2025 at 17:39 Last edited by gareth 14th Mar 2025 at 17:39
gareth Administrator Daily subscriber Has not played this puzzle yet
Just as a general answer, all the Futoshiki puzzles on puzzlemix can be solved without guessing. You'll never need any technique more complex than using an 'x-wing', meaning that you look for a digit that can only appear in the same two columns within any pair of rows and then eliminate it as an option from anywhere else in those two rows - or the reverse, with row and column swapped. I use x-wings much more in the Futoshiki puzzles on puzzlemix than the Sudoku puzzles, since sudoku are generally much more heavily constrained with the additional boxes.
That seems like an important technique. Is there an example you can give, or a link from online that illustrates this visually? At my level, I am finding it hard to visualise this. Anyway, thank you so much for the daily puzzles, really adds a lot of fun and brain exercise to my life!
Posted 16th Mar 2025 at 20:59
gareth Administrator Daily subscriber Has not played this puzzle yet
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If a puzzle is opened more than once, including by loading from a saved position, then this is potentially a significant aid so it is listed as being completed with 'multiple sessions' for the purpose of the best time/average rating displays above.
Minor aid is defined as no more than one use of 'Check solution' when incomplete and/or no more than one use of 'Check solution' when wrong; and/or using highlighting aids (show repeated digits, show broken inequalities and show valid/invalid placements [slitherlink] only). Major aid is any and all other use of the solving aids except for 'show wrong'.
Can this be solved without guessing?
Last edited by gareth 14th Mar 2025 at 17:39
https://www.sudopedia.org/wiki/X-Wing
Last edited by gareth 16th Mar 2025 at 21:01
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