Variant Library
Go (Weiqi/Baduk/Igo) is a territorial strategy game originating in China approximately 4,000 years ago. Two players take turns placing stones on grid intersections, surrounding territory and capturing opponent groups by filling their liberties. From one fundamental rule emerges extraordinary strategic depth.
This library includes 14 playable variants spanning different board sizes, information models, team formats, and rule modifications.
Standard Boards
- Standard Go (19×19) — The full tournament game: 361 intersections, komi 6.5
- 13×13 Go — Intermediate board for 30–60 minute games
- 9×9 Go — Quick games and beginners, tactical focus
Hidden Information
- Phantom Go — See only your own stones, referee mediates captures
- One-Colour Go — Same colour stones for both players, remember which are yours
Team Play
- Rengo — Team Go (2v2 or 3v3), partners alternate turns, no consultation
Historical
- Tibetan Go — 17×17 board, pre-placed stones, delayed captures
- Sunjang Baduk — Korean historical Go with 16 pre-placed stones
Rule Variants
- Capture Go — First capture wins: the universal teaching variant
- Toroidal Go — Edges wrap: no corners, no sides, no safe edges
- Stoical Go — Cannot capture if opponent captured last turn
Placement Games
Five-in-a-row placement games played on the Go board.
- Gomoku — Ancient placement game: five in a row wins
- Ninuki-Renju — Custodial captures added to Gomoku; historical precursor to Pente
- Renju — Competitive Gomoku with forbidden moves for Black