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# #610, September 7 - September 13, 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.

## 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...

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## ... by: Dieter

#610 - basics: %
Complete row C and ABC456: C5 = (2,6,8,9)
Failed with basic checks: C5 = 6,8,9
C5 = 2 solves with A2=4 & B2=1
I do not use a solver, only a self-built EXCEL Macro which shows the options for each cell.

## ... by: Frans

#610

Combination 2-digits cells

C3=6 ( G8=7 ) Solved,

Total solving time is : 7 sec.
Number of logical steps is : 727

## ... by: Serban

# 610 Basics to 24

1. Box 9 GHJ789 n=2 e=7 Nc=14 Ns=8 => J8=1 & H9=5 solve

2. Number 1 n=2 e=7 N=32 Nc=100 Ns=56 => J8=E7=1 OR A9=E7=1 OR A9=J8=1 solve

3. Number 9 n=2 e=7 N=31 Nc=36 Ns=6 => J3=9 OR F2=C1=9 solve

## ... by: Potato

Easy peasy lemon squeasy. D4,5,6 = 7,3,5 E 4,5,6= 6,8,9 F 4,5,6= 4, 1,2

## ... by: Serban

# 610 Basics to 24

1 . J3=9 solve

## ... by: James Havard

A9=1 with G1=5 gives a singles solution