Play Position against the computer is launched via the play computer button shown on most Chess Tempo boards. The Play vs Computer page is launched with the board setup to match the position shown on the board the computer was launched from. You can select the default engine strength used in play vs position analysis by setting the maximum depth and think time in the Play Computer options tab in your preferences.

If you'd like to play the position against a weaker opponent, you can also use the New Game button to start a new unrated game, the start position option will be automatically set from the selected position, and you can choose your own target opponent rating.