Play Kurodoku Online - Black Cell Logic Puzzle

Play Kurodoku puzzles online for free! Shade cells black while keeping white cells connected. Numbers show visibility in four directions. Pure deduction!

Logic Puzzles CA — Modern Browser Puzzles and Brain Games

Play beautifully crafted logic puzzles in your browser. Explore Crowns, Binary Sudoku+, Aquarium, Color Flood and more — fast, mobile-friendly, and free.

Our Games

Crowns — A symmetry-based grid puzzle using pure deductive reasoning
Binary Sudoku+ — Fill grids with 0s and 1s following unique row and column constraints
Aquarium — A water-filling logic puzzle based on constraint satisfaction
Color Flood — Connect colors across the grid using logical deduction
Dot Stream — Path-finding puzzles based on graph theory
Daily Logic Puzzles — A fresh set of brain teasers every day
Solitaire Pro Collection — Classic card games with six variants
Enclose Fox — Build pens with limited walls in this daily grid puzzle

Learn More

Blog — Articles on puzzle design, solving strategies, and brain science
About Us — Meet the team behind Logic Puzzles CA
Mobile Apps — Download our puzzles for iOS and Android
Contact — Get in touch with us

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Play Kurodoku Online - Black Cell Logic Puzzle

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