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Queens Unlimited Game. Each board asks you to position four chess queens so that no two threaten each other and every row and column contains exactly one queen. Simple? Not quite. Linked clues, shaded regions, and blocked squares force you to deduce rather than guess, turning a 90-second diversion into a genuine mental workout. Now imagine having that same puzzle—unlimited boards, offline play, stat tracking, and a distraction-free side-panel—inside your browser instead of hidden in a social-media feed. The extension’s lightweight generator produces infinitely many 4 × 4, 5 × 5, and even specialist 6 × 6 boards, each verified for uniqueness and solvability by an embedded SAT solver. Whether you crave a single refresher during lunch or a marathon of logic on a long flight, fresh challenges are one click away. Unlike word games that privilege native speakers, Queens relies solely on spatial reasoning and deductive logic. International teams share the same level starting point, making it an inclusive brain-trainer for multicultural workplaces, STEM classrooms, and ESL learners who prefer puzzles untainted by vocabulary gaps.