... by: Serban
# 693 H9=8 Basics 241. B5=H2=5 solve
2. C4=F6=3 solve
3. F7=H4=7 solve
4. H2=5 & J2=8 solve
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#693, April 11 - April 17, 2026:
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WARNING: This is the Weekly 'Unsolvable' Sudoku, rated above 'Extreme'. This is currently unsolvable by my solver, except perhaps with trial and error strategies. Using the solver will not help you. (much). |
Changes March 2026
Due to the introduction of Forcing Nets many Weekly Unsolvable puzzles can now be solved. I have flagged all the Sudoku ones which are solvable. I am struggling to make any new ones so we'll have to see if the Weekly can continue. The point of the Weekly was to provoke discussion and new ideas, so that is progress. But my solution is unlikely to be optimal so alternatives are welcome.Archive
Each week a new 'unsolvable' will be published and the previous will be accessible here from this archive section. If you like very tough puzzles, these are for you.Share and Enjoy
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Discussion...
Post an idea here...Saturday 11-Apr-2026
1. B5=H2=5 solve
2. C4=F6=3 solve
3. F7=H4=7 solve
4. H2=5 & J2=8 solve
Saturday 11-Apr-2026
... by: Frans Goosens
#693With trial and error
Combination A2=678 and G9=167
************************************************************
A2=6 G9=1 No solution, Fixed
Combination 2-digits cells
A7=1 Wrong, Undo calculation
A7=4 Wrong, Undo calculation
All reset to initial position
************************************************************
A2=6 G9=6 Wrong, Undo calculation
All reset to initial position
************************************************************
A2=6 G9=7 ( A7=4 ) Solved,
Total solving time is : 91 sec.
Number of logical steps is : 12078