... by: BGH
All your solutions confirmed.Most interesting:
2 @ J2 Solves for 2 in Blocks R3C1, R3C3, R1C3 & R1C1
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#689, March 14 - March 20, 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). |
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
Supporter Members have access to all these puzzles going back to number 1.
Discussion...
Post an idea here...Saturday 14-Mar-2026
Most interesting:
2 @ J2 Solves for 2 in Blocks R3C1, R3C3, R1C3 & R1C1
Saturday 14-Mar-2026
... by: BGH
After basics 29.22 Step Solution (Pretty interesting double swordfish in 7’s)
7 @ B7 (Swordfish #1, solves for all 7’s in swordfish #1) 33.2
7 @ E4 (Swordfish #2, solves for all 7’s in swordfish #2) Solution
Saturday 14-Mar-2026
... by: Frans Goosens
#689Combination 2-digits cells
B7=4 No solution, Undo calculation
B7=7 ( G6=7 ) Solved,
Total solving time is : 8 sec.
Number of logical steps is : 856
Saturday 14-Mar-2026
... by: Dieter
#689 - initially populated cells: 23 = 28,4 %No solver used, solver = brain.
basics: %
Strategy: numbers 1,2,3,7,8 occur most frequently, combine two cells.
combinations of G2 = (1,2,3) and J2 = (2,3,8)
G2=1 & J2=2 solves.
Saturday 14-Mar-2026
... by: Yves
Two one cell solutionsJ2=2 or J7=4