Math Puzzle Hub
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ZenReduce
A Lianliankan-style number puzzle. Match equal pairs, divide larger by smaller, or reduce by GCD. Clear the whole 8Γ8 board.
Logic
8Γ8 board
Arithmetic
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ZenStroke
Draw a single unbroken brushstroke across a hexagonal board. Each cell you touch flips color. Make every concentric ring uniform.
Parity
Hex grid
3-9 rings
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ZenKnight
The classic chess puzzle. Move a knight in L-shapes to visit every square on the board exactly once. Includes Warnsdorff hints and auto-solver.
Classic
5Γ5 to 8Γ8
Chess
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ZenPath
A hidden curve winds through 15 sliding blocks. Slide blocks (15-puzzle style) until all the curve fragments align β forming one continuous path from edge to edge.
Sliding
4Γ4 grid
Hamiltonian
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Zenduku
A 5Γ5 mini-sudoku with random irregular regions. Each row, column, and region must contain 1-5 exactly once. Solve as many puzzles as you can against the clock.
Time attack
5Γ5 grid
Sudoku
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