[iryasdas] Pass the tablet game

Some variations on UI for a 2 person chess app to be played by passing the tablet back and forth:

After making your move, your clock stops and the screen blanks.  Your opponent unlocks the screen, making the board visible again, and only then does the opponent's clock start.  This avoids time loss during the time it takes to pass the tablet from one person to another.

Each player uses a personal unlock code, perhaps a pattern unlock, in order to prevent accidentally (or maliciously) playing the other player's move.

While a player is choosing their move, the UI makes available an analysis board that of course disappears when the tablet is passed to the other player.

Consider playing it as a team game with a ring of people with the two teams seated alternately.  Allow notes to be posted on each team's UI view, perhaps keyed to certain speculated moves or board position predicates.