Vim Sudoku
Undo (Ctrl+Z, U)
00:03
6
7
5
1
3
1
3
2
6
4
5
8
2
9
7
3
6
1
3
1
2
8
5
3
1
4
6
5
9
1
2
6
4
3
8
2
5
2
5
1
4
9
8
2
7
1
1
2
3
4
5
6
7
8
9
Congratulations
You completed the puzzle in
!