You will play the game with 2 players in the game: you and Ivan. The player, who has the most Prestige Points at the end of the game, wins the game.
If any rules are not specified in the Solitaire Mode rules category, they work the same way as in a 2-player game. For example, Ivan receives a penalty just like a regular player, if you complete a Cathedral card above his unfinished card.
Play your turn in the normal way, choosing one of the three available actions. Then it will be Ivan’s turn. Continue alternating turns in this way until you or Ivan have finished their six parts of the Cathedral. Regardless, as soon as the end of the game is triggered, no player will get the 3 bonus, but the other player will still get one final turn.