About brainGO: A Companion-Style 4×4 Go Puzzle Game
⏱ Read ~3 min · Updated July 2026 · Part of: Learn Go
brainGO is a companion-style 4×4 Go puzzle game. It shrinks the ancient game of Go to sixteen points, where it becomes a calm daily brain exercise anyone can play — no manual, no scoring, no numbers.
What brainGO is
- Pure 4×4 capture puzzles. You learn Go by capturing stones, not by reading rules. Every puzzle is solved by an exact engine, so the "right move" is provably correct.
- A companion, not a critic. A character that remembers your name, nudges instead of shaming, and celebrates with you. The point isn't the puzzle — it's the daily ritual.
- For all ages. Built for kids (no number anxiety, instant feedback), seniors (large text, high contrast, short loops), and adults (a two-minute break that's shareable like Wordle).
What brainGO is not
- Not a 19×19 match against an AI.
- Not a gambling or betting tool.
- Not a medical device or a dementia treatment. We say "keep your mind active," not "prevent dementia" — the science is still inconclusive.
Our honest stance
A lot of "brain training" marketing is louder than the science behind it. We keep the claim small and true: a daily puzzle is a good habit, it's satisfying, and it beats scrolling. That's the claim we'll stand behind.
How the puzzles are made
Every puzzle is generated by our own solving algorithm — exhaustively searched, difficulty-graded, provably correct. We don't use anyone's copyrighted puzzle collection. We were inspired by the teaching philosophy of tiny-board capture Go (the "Capture Go" / "Atari Go" tradition used worldwide to start beginners), not by any specific puzzle set.
Start playing
Pick a puzzle and place a stone. The companion will show you the rest.
👉 Play brainGO — your first puzzle