Quackdoku

One duck in every row, column, and colored region. No two ducks can touch—not even diagonally. Quackdoku is a cozy, number-free brain puzzle inspired by Sudoku, Queens, and spatial deduction. The rules take seconds to learn, but every board rewards careful thinking. Each puzzle has one logical solution, so you can solve it without guessing. A COLORFUL PUZZLE JOURNEY Travel with Quacky through charming themed worlds filled with increasingly satisfying challenges. Begin with friendly 5×5 boards, sharpen your deduction skills, and work your way up to demanding 12×12 puzzles. WHY YOU’LL LOVE QUACKDOKU • Thousands of carefully validated logic puzzles • Colorful themes with chapters, progression, and star ratings • Board sizes from beginner-friendly 5×5 to challenging 12×12 • Pure logical deduction—no guessing required • Helpful hints and Auto-X when you need a nudge • Pinch to zoom on larger boards • No timers and no ads • Play offline anytime • Game Center cloud saves and leaderboards • Achievements to discover and unlock • Available in English, Chinese, Japanese, and Korean Whether you have a quiet minute or time for a longer puzzle session, Quackdoku offers a relaxing challenge at your own pace. Can you find the one perfect place for every duck?