Mahjong v2 with a quantum layer — superposed tiles that show two faces until a claim, a kong or a win needs one, entangled pairs that collapse together, Schrödinger's wave and decoherence, odds-bind claims, 138 quantum rule modes against three AI opponents, 2,200 solver-checked quantum puzzles, 57 tile styles drawn at runtime, 194 layouts with seventy neon mahjong presets, 60 wall shuffles with deal seeds, and five languages.