Nine logic puzzles,
graded honestly.
Every board is generated fresh, and every difficulty rating is earned — a puzzle is only called Expert if a solver using nothing but human techniques actually had to work that hard to finish it. Play any of the nine below in your browser: no account, no install.
The iOS app is in development — no App Store link yet. Everything plays here in the meantime.
Play
Each game ships with its own generator, its own exact solver, and its own technique ladder — so every board is solvable by reasoning, never guessing. Seven of them let you pick the board size as well as the difficulty.
Sudoku
The classic 9×9. Five tiers from a gentle Easy to an Extreme that needs chains and fish.
PlayKakuro
Crossword arithmetic. Fill runs of digits that add to the clue, never repeating one.
PlayHitori
Reject duplicate numbers until every row and column is unique — without splitting the board.
PlayBridges
Connect the islands with the exact number of bridges each one asks for. Nothing may cross.
PlayNurikabe
Carve islands of the given size out of one connected sea. No pools, no stray lakes.
PlaySlitherlink
Draw one closed loop so every numbered cell touches exactly that many edges.
PlayBattleship
Locate a hidden fleet from the counts along each edge. Ships never touch, not even diagonally.
PlaySkyscrapers
Place towers so each row and column holds every height once — and the edge clues see the right count.
PlaySkyscrapers Plus
Skyscrapers with pre-placed heights and interior clues — a longer, more constrained deduction.
Play