IPG 3.5 Tournament Error — Deck Problem


The contents of a deck or sideboard do not match the decklist registered and the decklist represents what the player intended to play.

If there are extra cards stored with the sideboard that could conceivably be played in the player’s deck, they will be considered a part of the sideboard unless they are:

  • Promotional cards that have been handed out as part of the event.
  • Double-faced cards represented by substitute cards in the deck.
  • Damaged cards that have been officially proxied for the tournament.
  • Double-faced cards being used to represent the back side of cards in the deck. These cards must not be sleeved in the same way as cards in the main deck and/or sideboard.

Cards in different sleeves, tokens, and double-faced cards for which substitute cards are being used are ignored when determining deck (not sideboard) legality.

If a player is unable to locate cards (or identical equivalents) from their main deck, treat it as a Decklist Problem instead. If sideboard cards are missing, make a note of this, but issue no penalty.

The discovery of a card that violates a companion restriction is a Deck Problem if the player does not wish to modify their decklist to accommodate the companion restriction.


  • A. A player has 59 cards in their deck, but 60 listed on their decklist.
  • B. A player has a Pacifism in their deck from a previous opponent.
  • C. In game one of a match, A player has Pithing Needle in their deck, but only has one registered in their sideboard.


Players are expected to call attention to deck errors immediately, and not gain any potential advantage from having the cards in their deck.

The most common forms of deck error are failure to desideboard and having a card in the wrong deck. Both of these are difficult to gain advantage from without obvious cheating. Allowing the opponent to choose which card they would have otherwise be working with is sufficient to compensate for the easily discovered situations.

Duplicates of cards that begin in the main deck are more problematic, as they are not as easy to realize and catch, and thus mandate an upgraded penalty.

A window in which the error is a Game Loss is necessary to discourage intentional abuse of the minimum number of cards in the deck. Once that point has passed, the opponent agrees that the deck is valid. Judges should always be mindful of the abuse possibilities when investigating these infractions.

Additional Remedy

Locate any cards missing from the deck and any incorrect cards in any game zone. Reveal those cards to the opponent.

The opponent chooses which of the missing cards replaces each incorrect card; any extras are shuffled into the random portion of the library. If more cards are being removed than added, prioritize ones not in the library first.

If there are still additional cards not in the library that need replacing, they are replaced by cards from the random portion of the library. Be wary of previously known portions of the library, such as from Scry effects.

If the missing card(s) are with the sideboard and it isn’t the first game, choose the ones to be returned to the deck at random from main deck cards in the sideboard.

If the error caused a violation of a companion restriction and it is a post-sideboard game (or a pre-sideboard game and the player has elected to continue with the deck they registered that does not match the revealed companion condition), locate all cards violating the restriction.  Then, choose that number of cards at random from unrevealed cards in the sideboard that meet the companion restriction. The opponent decides which chosen card replaces each illegal card. If making the deck match the companion condition is impossible, upgrade the penalty to a Game Loss.

If the missing card(s) were in a previous or current opponent’s deck, issue penalties to both players.



While presented to the opponent for pre-game shuffling or during a deckcheck, if it is discovered that a deck contains an invalid number of cards (and any missing cards are not in the opponent’s deck) or a sideboard contains too many cards, the penalty is a Game Loss.



If an opponent may have made strategic decisions based on the presence of a sideboard card (such as having seen it in the hand or library during a search effect), the penalty is a Game Loss.



If an error resulted in more copies of a main deck card being played than were registered or allowed by companion restriction and this was discovered after the game had begun, the penalty is a Game Loss unless all copies of the card are still in the random portion of the library. For example if the decklist has two copies of Shock in the main deck and two in the sideboard, but a search finds two copies of Shock in the library with another already in the graveyard, the penalty is upgraded.