Kerodoku: Brain Puzzle Games

One frog per row, column and color — and no two frogs may touch. Hundreds of verified single-solution puzzles, a fresh daily challenge, no timer. Pure logic, no guessing.

Kerodoku is a pure logic puzzle that blends the deduction of Sudoku with the elimination of Minesweeper — with frogs.

Every board is split into colored regions. Your job: place exactly one frog in every row, every column and every color region, and never let two frogs touch — not even diagonally. Tap to mark an X, tap again to place a frog, swipe to clear a whole run of cells. Three lives per board; when a frog lands wrong, you see exactly which rule it broke, so every mistake teaches you something.

HOW IT PLAYS • One frog per row, per column, per color region • No two frogs adjacent — horizontally, vertically or diagonally • Every puzzle has exactly one solution and is solvable by logic alone. No guessing required, ever • Boards grow from a gentle 6×6 to brain-bending 10×10

WHY PLAYERS STAY • Hand-checked puzzles with a smooth difficulty curve — you learn a new technique every few stages • Daily challenge: one fresh board a day, race your own best time • Streaks and a daily challenge that keep your practice going • Hints and scans when you're stuck — use them or earn bragging rights without them • Short sessions, no timer on regular stages • Calm pastel look, satisfying haptics, no forced tutorials past the first minute

If you enjoy Sudoku, Queens, Star Battle, Nonogram, Minesweeper or any "one per row and column" riddle, Kerodoku will feel instantly familiar — and then surprise you with how deep it goes.

Kerodoku (개굴도쿠) is made by Fervorlab. Play it on the web at kerodoku.fervorlab.com.