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This is a place chosen to make available some ideas (on puzzles, patterns, etc)
that seemed unsuitable for posting in a Forum, but some people may find interesting.
For difficult puzzles, possible solutions will not be shown (only hints).
For other puzzles, the solution wil be hidden so that a serious attempt can be made
without direct access to a solution.
(hopefully this will make the puzzles more interesting for newcomers)
(Guidelines for using this site here)
(useful to look up for the meaning of some unfamiliar concept)
I propose this newly created Hidoku puzzle (for a manual solution !)

.---------------------------.
7 | __ __ __ 01 __ __ __|
6 | __ 19 __ __ __ 42 __|
5 | __ __ __ 31 __ __ __|
4 | __ 22 __ 30 __ __ __|
3 | __ __ __ __ 35 __ 12|
2 | __ __ __ __ __ __ __|
1 | __ __ __ 49 08 __ __|
'---------------------------'
a b c d e f g
Update 1 (Sept 13, 2026)
This puzzle has a very tough beginning, but after working
hard in the first move, placing a key number, only easy
deductions are needed afterwards !
Some hints for the key move 1:
. study important connections, like 01-08, 12-19, etc, and the
possible paths for each connection.
. special attention to unique passages is very important, like
f3, d3-f4, c4, and a few others.
. In summary: global view is better here than local considerations.
Created: February 12, 2024
Contact: sudo.jco.br@gmail.com