For some unknown reason, we now find ourselves in a situation where we must quickly interpret a six-digit digital code. We will analyze this code by gathering various uncertain pieces of information. Its meaning will become clear in our hands, just as it always has.

In Digit Code, each player in a two-player game creates a secret six-digit code, with three numbers above three numbers, with a digit 0-9 appearing at most twice and not adjacent to one another. The letters A-Y are used to indicate number segments in a column or in a row, or within a particular digit. Players take turns asking each other questions of the following four types:

• How many spaces in row ? or column ? are filled?
• Is the number ? even or odd?
• Looking at the adjacent numbers ? and ??, which one is larger?
• Is the segment at row ? and column ?? filled?

Each player must ask all four question types before they can repeat a question type. On a turn, a player can give a six-digit number instead of a question. If they have guessed all six numbers correctly, they win; if not, the opponent says "Wrong", and the game continues. If a player guesses incorrectly twice, they lose.

With three or more players, one player creates a six-digit number that the other players race to deduce first, with the players asking questions in turn. Once again, if a player guesses incorrectly twice, they are out of the game.