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#589, April 13 - April 19, 2024:
The Weekly 'Unsolvable' Sudoku Puzzle

by Richard Kröger, 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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Sunday 14-Apr-2024

... by: Werner Dubs

I solved this puzzle using my Big Dog program I wrote in Visual Basic. Big Dog is designed to build and validate Sudoku puzzles. It also builds Sudoku + puzzles where I can add from 1 to 6 additional color sectors to the puzzle where each sector has 9 cells. Just like adding 2 sectors to make a diagonal. Big Dog solved and validated this puzzle as to just having 1 solution in 40 seconds. If you have any questions about Big Dog you can email me at marty_dubs@msn.com

Saturday 13-Apr-2024

... by: Serban

# 589 Basics to 22

1. Number 5 n=2 e=7 N=26 Nc=23 Ns=10 => C1=G2=5 solve

2. Number 7 n=3 e=6 N=18 Nc=10 Ns=6 => D3=J6=7 OR D3=B4=7 solve

3. Number 9 n=2 e=7 N=29 Nc=50 Ns=21 => D7=J8=9 solve

Saturday 13-Apr-2024

... by: Serban

# 589 Basics to 22

1. Number 5 n=2 e=7 N=26 Nc=23 Ns=10 => C1=G2=5 solve

2. Number 7 n=3 e=6 N=18 Nc=10 Ns=6 => D3=J6=7 OR D3=B4=7 solve

3. Number 9 n=2 e=7 N=29 Nc=50 Ns=21 => D7=J8=9 solve
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