What is entangled-cat?

Entangled Cat is a print-and-play tabletop card game that uses quantum computing concepts as its theme. Quantum computing is a type of computing that uses principles from quantum physics, this game turns those principles into card-based strategy without requiring any technical background to play. Players compete to be the first to assemble complete quantum circuits, sequences of gate cards arranged in the correct order to match a target algorithm card. There are three decks: the Gate Deck contains cards for quantum operations (H, X, Z, CNOT, MZ, MX, and others), the Algorithm Deck contains famous quantum algorithms (such as Deutsch-Jozsa, Grover's search, and Teleportation) that specify which gates and in what order, and the Special Deck contains attack and defense cards. A Decoherence card, for example, lets you remove one gate from an opponent's sequence. On your turn you draw cards and, when you hold a complete matching sequence, you declare a "measurement", the equivalent of running your algorithm. Other players get a chance to play disruption cards from the Special Deck before the attempt resolves. Defense cards can block those attacks. If the algorithm executes successfully you keep the points, if it fails all those cards are discarded. Simpler algorithms (two to three gates) are worth 10 points, medium ones 20, and complex six-or-more-gate algorithms are worth 30 to 40 points. Disrupting an opponent's successful attempt earns bonus points. The game is free forever. Card definitions are stored as YAML files and the repository includes a simulator for balance analysis. Code is MIT or Apache-2.0 licensed, rules and graphics are CC BY-SA 4.0.