Dibs

A playing-card game for two to four players (or more if you really want)

Setup

First, establish a 'dibs order', alphabetical by name, age, or who's sitting where, so long as you can track the dibs order as it moves.

Second, shuffle the deck, if you didn't already. Then, each player secretly draws two cards, face-down, then looks at them.

Players may legitimately take a card if it matches either the rank, or the suit, of either of their secret cards.

Play

Once everyone has their secret cards, play begins: draw a card face-up. The current player in the dibs order has the right to take this card first. If not, they pass the card to to the next person in dibs order. If the last person in dibs order doesn't want the card, they place it face-up in the discard pile.

Once a card is either taken or discarded, the 'dibs' right moves to the next person in dibs order. So, Player 1 has dibs on the first face-up card, then Player 2 has dibs on the second face-up card, then Player 3, and so on around the table.

Players who take a card leave it face-up in a pile of their own, open to other players' inspection. These cards do not count as secret cards, and do not entitle a player to take face-up cards they otherwise couldn't take.

Challenges

A player can take a card illegitimately, a face-up card that does not match either the rank or the suit of either secret card. If no other player notices or challenges this, the player's take remains valid.

If a challenger brings it up:

The challenged player shows one of their secret cards that permits the card they just took. The challenged player discards this card, and secretly draws a new card to replace it. They keep the face-up card they took. The challenger must discard a secret card, and does not replace it. If the challenger has no secret cards left, they lose the game.
The challenged player shows one of their secret cards that does not permit the card they just took. The challenged player discards this card and does not replace it, and passes along the card they just took. The challenger does nothing differently.

Players may only challenge another player for the card they take during this turn. Cards taken previously that went unchallenged remain valid, even if the player no longer holds the secret card that permitted them, or even if they were taken invalidly in the first place.

In the event that a challenged player has to draw a replacement secret card but the deck is empty, this ends the game (see 'Winning' below).

Winning

The last person with a secret card wins! Or, the player with the most taken cards, at the end of the deck. Or if tied, the player who can show the most successful illegitimate card-takes.

Continuing