Omok · 오목 (Korean Five-in-a-Row)

Traditional Korean Omok in your browser — renju (3-3) rule toggle, a movetext log with board coordinates, multilingual support, and handcrafted Korean-inspired board themes and stones. A companion piece to the Janggi project, sharing its ink-wash landscape and porcelain-stone world.

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Features

• Local two-player — place stones on the 15×15 grid; first to five in a row wins
• Renju (3-3) rule toggle — optionally forbid Black from making a double-three; off by default (free rule)
• Move log with coordinates — every move recorded as board coordinates (columns A–O, rows 1–15)
• Board coordinate labels — A–O / 1–15 along the edges, like a classic game record
• Traditional Korean board themes
  • Sansuhwa (Ink Wash Landscape)
  • Wood
  • Sipjangsaeng
  • Hanji
• Handcrafted stones — Baekja (white porcelain) and Meokbit (ink-toned) pebbles, fully top-down
• Multiple languages
  • English
  • 한국어 (Korean)
  • 日本語 (Japanese)
  • 简体中文 (Simplified Chinese)
  • 繁體中文 (Traditional Chinese)
  • Deutsch (German)
  • Français (French)
• Mobile and desktop support — responsive layout for both

Planned

• AI opponents — a self-implemented heuristic / minimax engine with selectable difficulty (in progress)

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What is Omok?

Omok is a traditional Korean board game in the "five in a row" family (known as Gomoku elsewhere). Players take turns placing stones on the intersections of a 15×15 grid; the first to line up five of their own stones — horizontally, vertically, or diagonally — wins.

This project optionally supports the renju 3-3 rule, under which Black may not play a move that creates two "open threes" at once. It is a competitive balancing rule (Black moves first and so has an advantage); it is off by default and can be turned on in settings.

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Tech

• Vanilla JavaScript, HTML, and CSS (no framework)
• Single-file game logic; no build step
• No external engine dependency — the planned AI will be implemented directly in JavaScript

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License

The code and the visual assets are licensed separately.

• Code (index.html, style.css, script.js) — MIT License. Unlike the Janggi project (which integrates GPLv3 Fairy-Stockfish), Omok has no such dependency, so the code is released under the permissive MIT license.
• Visual assets (board backgrounds, stone artwork, and other theme/UI images under assets/) — All Rights Reserved by Hanrim. They are not covered by the MIT license and may not be redistributed or reused when forking the code. See ASSETS_LICENSE.md.
• Sound assets (assets/sound/) — third-party, from Pixabay; see ASSETS_LICENSE.md for attribution.

If you fork or redistribute this project, the MIT license applies to the code only; the visual assets must not be redistributed with it.