Prime Yourself for Trick-Taking Challenges with Yokai Septet and Mit List und Tücke

Mit List und Tücke ("With Cunning and Treachery") is a trick-taking game with quite a few twists. The deck consists of cards in four suits, and the deck is adjusted based on the player count so that everyone receives a hand of 14 cards to begin a round. At the start of a trick, the lead player plays any card, setting trump for that trick. Each other player plays any card that they like — except that once three colors of cards have been played, the fourth color cannot be played. Whoever plays the highest trump card wins the trick and collects two of the cards played (or three cards in a game with five or six players), placing these cards in front of them. Whoever plays the lowest non-trump card collects the remaining cards; this player leads to the next trick.

Once a player has cards of all four colors in front of them, they must choose two colors and leave cards of this color face up, placing all other cards face down. As they collect more cards, they place them face up or face down based on their colors. The round ends after 14 tricks or when a player would be forced to play a card of the fourth color to a trick; in this latter case, the round ends immediately. Each player then scores the cards they've collected. For their two face-up colors, they multiply these numbers together; they then divide this product by the number of cards that they placed face down, rounding this number down. For example, if you have 6 yellow cards, 4 red cards, and 2 blue cards, then you have (6 • 4)/2 = 12 points. If you collect cards of only one color, then you score 0 points!

Play as many rounds as the number of players. Whoever has the highest total score wins!

Shuffle the deck, then deal ten cards to each player. The leader plays any prime number from a combination of 1-3 cards (see below), then in clockwise order, players may pass or play a larger prime number than the most recently played prime using the same number of cards as the leader. (A player can optionally draw a card from the deck prior to playing.) The round continues until no player wants to play. The last player who played a valid number leads the next round. If you get rid of all cards in your hand, you win the round and whoever first wins two rounds wins the game.

To play a prime number, take 1-3 cards from your hand and arrange them to create a single number by using all the digits on those cards. If the number is prime, your play is valid. For example, if playing "3" and "5", you may arrange their order and play them only as "53" because "35" is not a prime number. To play three cards, all of the cards must have single digits on them (so you can't use "10" or "12") and at least one of the cards must feature a "play three" icon.