Think Twice

## Description

_Think Twice_ is a conversion of the board game _Mastermind_. The basic
concept is unchanged: there are four free slots and six colours. In each round
the computer randomly generates a colour combination and the player has to
guess it within ten turns. In each round, the player divides the colours in
the slots and the computer tells how many colours were correct of how many of
them are in the correct slots. There are four playing modes: each colour only
appears once per round, colours can appear multiple times, “no colour” is a
seventh possibility and a combination of the two latter.