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Bimaru

A free solitaire game — play it in your browser, no install. A calm, open-source Bimaru (battleship solitaire) logic puzzle for phones and laptops. Pastel art, smooth animations, satisfying sounds.

by @graphoflife · graphoflife/Bimaru on GitHubLANG JavaScriptHOSTED ON GRAPHOFLIFE.GITHUB.IOUPDATED 24 Oct 2026

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Controls: A fleet of ships is hidden in the grid. The fleet is shown above the board, or…

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From the README

A calm, open-source Bimaru (battleship solitaire) puzzle for phones and laptops. Pick a board size and a difficulty, then find the hidden fleet. Every puzzle has exactly one solution and can be solved by logic alone, with no guessing.

A puzzle only ships if the solver can finish it using the strategies of its level, so you never need to guess. This holds from any position, not only from the start: whatever correct marks you have made, in whatever order, a provable next move exists. The test suite checks exactly that by starting from random partial boards and following hints to the end.

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