#593, May 11 - May 17, 2024: The Weekly 'Unsolvable' Sudoku Puzzle
by Richard Kröger, guest compiler
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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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Discussion...
Post an idea here...
... by: Dieter
row E and DEF 456 have minimum possible numbers (19 each) in cells
Start with reducing possible numbers: E1 = (2,9) and E7 = (2,4,5,6)
E1=9 and E7=4 >> solved
... by: Frans Goosens
#593
Combination 2-digits cells
C8=2 No solution, Undo calculation
C8=5 No solution, Undo calculation
E1=2 No solution, Undo calculation
E1=9 ( E4=6 ) Solved,
Total solving time is : 6 sec.
Number of logical steps is : 644
... by: Frans Goosens
#593
Combinatie 2-cijferige cellen
C8=2 Geen oplossing, Ongedaan gemaakt.
C8=5 Geen oplossing, Ongedaan gemaakt.
E1=2 Geen oplossing, Ongedaan gemaakt.
E1=9 ( E4=6 ) Opgelost,
Totale oplostijd is: 7 sec.
Aantal logische stappen is : 644
... by: Serban
# 593 Basics to 22
1. Number 3 n=3 e=6 N=19 Nc=15 Ns=10 => F2=G4=3 basics to 52
1a. XY-wing 459 [H1,AJ2]=>[A1,G2]<>5 => A1=2 OR H1=5 solve
2. Number 4 n=3 e=6 N=18 Nc=10 Ns=6 => E7 = H6 =4 solve
Archive
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