Nishi Games

A sovereign games portal — classic abstract and board games, built from scratch on the Nishi stack and playable right here in your browser. No accounts, no trackers, no third-party code.

How these are built: every game here is an original implementation. The rules of chess, go, checkers, tic-tac-toe and Chinese checkers are not copyrightable, so we build them clean — no ROMs are rehosted and no third-party code runs. Genuinely free / public-domain / freely-licensed ROMs may be added later, but only behind a verified-license provenance gate: “available on archive.org” is not the same as “legal to rehost,” so nothing ships here without a confirmed free license.

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Tic-Tac-Toe · vs unbeatable AI

You are X and move first. The AI plays a full minimax search, so it never loses — the best you can force is a draw.

Your move (X).

Connect Four · vs alpha-beta AI

You are red. Click any cell in a column to drop a disc; get four in a row — horizontal, vertical or diagonal. The AI searches 5 plies with alpha-beta pruning.

Your move — you are red.

On the board & coming next

Tic-Tac-Toe

Unbeatable minimax
Playable

Connect Four

Alpha-beta, 5-ply
Playable

Checkers

Engine exists (nx_checkers) — wiring to the browser next
Engine ready

Chess

Sovereign engine + board UI
Coming soon

Go

9×9 then 19×19, scoring + bot
Coming soon

Chinese Checkers

2–6 players
Coming soon

Reversi / Othello

Minimax bot
Coming soon