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#616, October 19 - October 25, 2024:
The Weekly 'Unsolvable' Sudoku Puzzle

by Andrew Stuart
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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Tuesday 22-Oct-2024

... by: anon

I randomly put "6" on В6 and the solver solved it step by step

Sunday 20-Oct-2024

... by: Frans

#616

Combination 2-digits cells

B4=7 No solution, Undo calculation
B4=8 Wrong, Undo calculation
B4=7 No solution, Fixed
B1=6 No solution, Undo calculation
B1=9 ( C4=2 ) Solved,

Total solving time is : 15 sec.
Number of logical steps is : 1931

Saturday 19-Oct-2024

... by: James Havard

A2=6 with F8=6 gives a singles solution.

Saturday 19-Oct-2024

... by: Serban

# 616 B2=2 B7=3 Basics to 25

1. Box 4 ABC456 n=3 e=6 Nc=6 Ns=5 => A5=8 solve
Note: B4=7

Saturday 19-Oct-2024

... by: Dieter

#616 - basics: B2=2; B7=3
strategy: try to get hidden pairs or triplets
combinations of E4 / J4 = (2,4,8) / (3,4,5): 3 matrices left after basic checks: 2/4, 4/5 and 8/4
E4/J4 = 4/5 solves with D2=3
Page created on 03-May-2011, last modified on 30-May-2024.
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