| detect_seq | Detects if a certain sequence is present in a matrix. | 
| get_cols | Get all column vectors of a matrix. | 
| get_diags | Get all diagonals vectors of a matrix. | 
| get_rows | Get all row vectors of a matrix. | 
| get_surround | Get surrounding elements of an element in a matrix. | 
| index2xy | Converts a matrix index into a sex of x,y coordinates. | 
| is_palindrome | Palindrome checker. | 
| UltimateTicTacToe | Play some Ultimate Tic-Tac-Toe? | 
| xy2index | Converts a set of x,y coordinates into a matrix index. |