String to fold:
XOXOOOOOXXXXOOOOXOOXXOOXOOXXOOOXXOOOOOXXRandom fold (* means dead end, backing up):
X
↑
X
↑
O→O
↑
O X←X
↑ ↓ ↑
O←O O←O←O←X←X←O
↑
O←X
↑
O
↑
O→X→X→O O←X
↑ ↓
O←X←O←O←O←O O←O←O←O←O←X
↑ ↓
X←X←X←X
Record number of incidences: 4
Record-achieving fold sequence:
↓↓←↑←↓←↑↑←↓↓←↑↑↑↑←↓↓↓←↑↑←↓←↑←↓←↑↑↑↑↑↑←↓