Card Trivia:Checkmate
- "Infernalqueen Archfiend" and "Terrorking Archfiend" appear in this card's artwork.
- Some of the "Archfiend" monsters share a common theme of paying LP during the Standby Phase, all of which are chess themed, which includes the monsters shown in this card's artwork. This card's TCG name is based on the checkmate game position in chess.
- However, this card's OCG name is based on the "discovered attack", a chess tactic which moves a chess piece out of the way to reveal an attack on an opposing chess piece. This card's effect reflects this, as it can Tribute an "Archfiend" monster to allow "Terrorking Archfiend" to attack directly.
- Despite this, this card's artwork and effect depicts "Terrorking Archfiend" to be the one to be declaring a direct attack, which kings are incapable of doing in chess.
- However, this card's OCG name is based on the "discovered attack", a chess tactic which moves a chess piece out of the way to reveal an attack on an opposing chess piece. This card's effect reflects this, as it can Tribute an "Archfiend" monster to allow "Terrorking Archfiend" to attack directly.
