Knightmare Chess is played with cards that change the default
rules of chess. The cards might change how a
piece moves, move opponent's pieces, create special squares on the
board or otherwise alter the game. For example, a card called
Demotion says: :Replace one of your opponent's pieces (except a King or Queen) with one of his captured Pawns. :
Play this card on your turn, instead of making a regular move. There are two sets of cards sold separately, each consisting of 80 cards. The sets are known as
Knightmare Chess 1 and
Knightmare Chess 2; a single 160 card deck can be created by shuffling both
decks together. SJG also sells blank cards, that can be customized by the player, in packs of 20. The graphics in the English version of the
Knightmare Chess cards are dark fantasy style,
nightmarish (hence the pun
Knightmare) color paintings by
Brazilian artist Rogerio Vilela. The French original version had a cartoonish tone, unlike the English version, and the cards in the French original version are also different from the English version. Another innovation of the American version is to include rules for "dueling deck" play, where each player has their own customized deck, possibly built from multiple copies of the set if desired. In SJG's version, each card is marked with a point cost. The total chaotic power of one's personal deck can be measured in the sum of the points of all cards in the deck. For a balanced game each player uses the same point total, or a stronger player can use a lower point total as a handicap. Cards which are too powerful to appear more than once per side are marked with an
asterisk, indicating that a player can only put one copy of that specific card in their deck. ==Critical reaction==