Solution code: Insert an 18 digit code of the 2nd and 6th row
on 11. July 2023, 11:48 by lerroyy
Very nice puzzle
on 31. December 2020, 14:09 by cdwg2000
Very Hard!
on 4. November 2020, 01:54 by Ragna
I can not find your "trick". Since of 123.
So: many bifurcations! Even Simon's solution basics on: "If this were a 1 .., than this were a 9..." If that.., then .... Where is the logic path? Sorry. Perhaps I don't see the main things.
So I had T & E. Surely my fault.?
on 2. November 2020, 19:38 by Mr.Menace
I’ve been staring at the grid for 15 minutes, but no real break in yet. Very curious to see what trick this is based on :)
on 31. October 2020, 14:24 by Undar_Beyond
Added F puzzle link
on 30. October 2020, 21:24 by primovera
Here's a link for it in F-puzzles: https://f-puzzles.com/?id=y5p6gz6s