... by: BGH
Ops!Goosen found A3/F4 First!
I found it independently.
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#673, November 22 - November 28, 2025:
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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). |
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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 22-Nov-2025
Goosen found A3/F4 First!
I found it independently.
Saturday 22-Nov-2025
... by: BGH
Basic Deterministics 33.32 Step Solution
3 @ A3 48.1% Cell Pair
3 @ F4 Solution Cell Pair
Saturday 22-Nov-2025
... by: Frans Goosens
#673Combination 2-digits cells
A3=3 ( F4=3 ) Solved,
Total solving time is : 12 sec.
Number of logical steps is : 1056
Saturday 22-Nov-2025
... by: Dieter
#673 - initially populated cells: 24 = 29,6%No solver used, solver = brain.
basics: D7=4, E8=6, F9=7
populated cells: 27 = 33,3%
Strategy: Numbers 7,4,9,2,6 occur most frequently, combine two cells.
combinations of A4 = (4,7,9) and F1 = (2,5,6)
2 matrices left after basic checks: A4/F1 = 7/2 and 9/5
A4/F1 = 7/2 solves with F4=3
Optimization:
F1=2 & F4=3 solve.