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#599, June 22 - June 28, 2024:
The Weekly 'Unsolvable' Sudoku Puzzle

by Klaus Brenner, guest compiler

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.
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Supporter Members have access to all these puzzles going back to number 1.

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Saturday 22-Jun-2024

... by: Dieter

basics: B7=3; B9=6
combinations of D7 / D9 = (4,5,8,9) / (4,5,8) > failed: 4/5, 4/8, 5/4, 9/4, 9/5
4 matrices remain; start with D7/D9 = 8/5 as 43% of cells occupied > failed
continue with D7/D9 = 8/4: solves with H7=5

Saturday 22-Jun-2024

... by: Frans Goosens


#599

Calculate 2-digits cells

( E2=8 ) Solved,

Saturday 22-Jun-2024

... by: Serban


# 599, B7=3,B9=6 Basics to 24

1. Row B n=4 e=5 Nc=22 Ns=9 => B1=8 & B4=9 solve

2. Row D n=3 e=6 Nc=13 Ns=3 => D8=5 & D9=4 solve

3. Row H n=4 e=5 Nc=12 Ns=7 => H1=6 & H7=5 solve

Saturday 22-Jun-2024

... by: Serban

# 599, B7=3 B9=6 Basics to 24

1. Number 8 n=3 e=6 N=18 Nc=10 Ns=2 => B1=J4=8 solve

2. Column 8 n=4 e=5 Nc=8 Ns=2 => F8=1 & D8=5 solve
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