Vim Sudoku
Undo (Ctrl+Z, U)
00:02
8
9
3
1
4
7
2
6
8
3
1
1
9
8
3
3
8
4
9
6
5
2
5
9
2
1
8
1
2
8
3
4
2
8
5
1
8
6
4
2
9
7
2
4
6
8
1
2
3
4
5
6
7
8
9
Congratulations
You completed the puzzle in
!