The New Sudoku Players' Forum

[Serg]

Hi, people!
champagne has just published interesting puzzle, having 2 symmetries - diagonal and antidiagonal (see thread The hardest sudokus (new thread) at this forum).

Code: Select all

1 . . . 6 . . . 5
. 9 . . . 2 . 7 .
. . . 8 . . 3 . .
. . 2 1 . . . 4 .
4 . . . . . . . 8
. 8 . . . 9 6 . .
. . 7 . . 4 . . .
. 3 . 6 . . . 1 .
5 . . . 2 . . . 9

The same in line form:

Code: Select all

1...6...5.9...2.7....8..3....21...4.4.......8.8...96....7..4....3.6...1.5...2...9

This puzzle seems to be very difficult if you don't use information about its symmetries. Is it possible to solve it not using information about its symmetries? I couldn't solve it, but I am poor sudoku player. Any takers?

Serg

[champagne]

Hi, people!
This puzzle seems to be very difficult if you don't use information about its symmetries. Is it possible to solve it not using information about its symmetries? I couldn't solve it, but I am poor sudoku player. Any takers?

Serg

Using symmetry of given, the puzzle is stte to the end, so the challenge is really to solve it without the symmetry of given.

EDIT : using skfr, the puzzle is rated 10.3 10.3 10.2, at the border of "potential hardest puzzles"

[champagne]

just for information, I checked that pattern, this puzzle is the only "double diagonal " of the pattern