The New Sudoku Players' Forum

[Hajime]

Inspired by the single diagonal puzzles, here a windoku with only 2 boxes (windoku box 1 and 4)
The 2 red boxes also need 1to9.

Symmetric, Singles only:
9 . . . 2 . . . 1
8 . 6 . . . 9 . 4
. 2 . 4 . 6 . 8 .
. . 8 9 . 7 4 . .
. . . . 6 . . . .
. . 4 2 . 5 8 . .
. 9 . 1 . 3 . 4 .
1 . 3 . . . 7 . 8
4 . . . 7 . . . 3

Undoable (some forcing chains):
. 8 . . 3 . . . .
. . . . . . 8 6 .
. . 4 . . . . 2 .
. . . . . . . 5 .
. . . 9 7 8 6 . .
. . . . . . . . .
. . . 2 . . . . 9
. . 9 6 . . . 3 .
. . 2 . 1 . . . .