Go Software

Software That Plays Go
Software That Teaches Go
Software That Helps You Study
Software for Playing Go on the Internet
Pairing Programs
Other Programs
For Programmers

Software that Plays Go

Available for Purchase

The following are programs you can purchase on the internet from a vendor of go products, or in many cases directly from the author.

  • Crazy Stone: Currently one of the strongest go playing engines. Available for PC, iPhone and iPad.

  • Ego: by Bruce Wilcox. It plays with nine different personalities.

  • FunGo: Includes a tutorial and 200 life and death problems. Play against the computer, or against a human opponent over the Internet.

  • Go++: Author Michael Reiss claims his program is "the strongest in the world"

  • Many Faces of Go: Purchase David Fotland's award-winning program. Igowin, a 9x9 freeware demo, is available for download.

  • SmartGo: Anders Kierulf's sophisticated tool for creation and review of computerized game records contains a library of over 45,000 professional games, It also plays against human opponents. A 15-day free trial download is available.

  • SmartGo Touch: Over 10,000 professional games and 2000 Go problems in your pocket. Can also be used to record your own games.

  • WULU: Winner of the 2000 Ing Computer Go Championship.

Available for Free Download

The following are programs you can download for free. Some work well on a variety of platforms.

  • PANDA-glGo: A 3D and 2D Goban, game viewer and editor, client for IGS-PandaNet and interface for GNU Go.

  • Tetsuki: An IGS client that lets you observe and play games online.

  • Aigo: Shareware plays go on your Palm Pilot.

  • Augos 6: Joachim Pimiskern test his theories of intelligence.

  • Dariush: 13x13 freeware, compatible with Kogo's Joseki Dictionary.

  • Explorer: Claims to be the strongest program for the Mac.

  • GnuGo: An open source go program.

  • GoSuite: A complete go application for your Pocket PC or smartphone. Play against GnuGo, record your games, and view sgf files.

  • Igo: DOS-based 9x9 version of David Fotland's Many Faces of Go rates your play as you progress.

  • Lumpy: Fast, easy to beat, uses Chinese scoring.

  • Minimago: 9X9 version of the DOS-based ImaGo program.

  • Peirson: DOS-based program.

  • Star Of Poland: The shareware version only plays the first 50 moves.

  • SW1: You can't beat the price!

  • TMW: Another DOS-based demo.

  • TurboGo: Includes a tutorial. Don't miss their screen saver -- use it to play through games when the computer is idle.

  • Wally: A simple program with C source code.

  • XO: DOS-based program with ASCII interface by Colin Walker.

  • GoRilla: GoRilla is a freeware Windows product that loads, edits, and stores SGF files.

  • Leela: Leela is a strong Go playing program combining advances in Go programming and further original research into a small, easy to use graphical interface.

Software that Teaches Go

These programs do not play, but they are designed to show you things that may improve your play. Searchable game collections, joseki tutors and other 'treating software" can be found in this category. Most of these programs are commercial products.

  • Fuseki Made Easy: Lessons on common opening patterns, annotated pro games and 500 problems.

  • Go At Ease: A lively animated introduction.

  • Go Dojo: Contact Fights: by Bruce Wilcox. 1400 interactive pages teaching contact skills.

  • Go Dojo: Sector Fights: by Bruce Wilcox. 1900 interactive pages teaching sector/approach skills.

Software that Helps You Study

The following programs enable you to record games for later review. Some also allow you to save variations, make comments, mark alternate moves, print diagrams and so on. Each has its own interface, unique features and drawbacks. They are sorted by platform.


  • Drago: Browse and edit files, print and export, and play against GnuGo.

  • Fuseki.info: Online database of more than 28,000 professional games.

  • Go Game Assistant: Play online, record and analyze your own games or study the library of 33,000 professional games or other teaching materials included with this shareware program.

  • GoGap: Guess the next move as you play through games and this Windows-based program from China keeps score.

  • Go2000: Game record database management system with pattern recognition.

  • GoGoD: Thousands of professional games in SGF format.

  • GoGrinder: a Java program for practicing go problems in SGF format. 347 problems are included in the install, and thousands more are easily downloadable (pointers in the documentation).

  • GoWrite: Recording software with many advanced options for printing game records.

  • Hibiscus Go: An oldie but goodie—this shareware editor has been around since 1997.

  • JaGo: This game recorder also works as an IGS client.

  • MoyoGo: Game analysis tool containing game records that were acquired from other collections without permission.

  • SmartGo: Windows software to play, replay, analyze, study, and print go games. With over 38,000 professional games and over 2000 problems. Free 15-day trial.

iOS and Android

Windows CE

  • Miniban: Help Sebastian Helm beta-test his recording/reviewing program for Windows CE.


  • Pon-nuki: For the Macintosh.

  • Goban: Free from Sente Software for Mac OS X 10.3.

  • GoMo: Free game recording software for the Mac OS/X.

Palm OS

  • Go for Palm OS: Free game record/review software for the Palm operating system.

  • PilotGone: Free recording software for the Palm operating system.

  • PalmGo: Free game record/review software for the Palm operating system.


  • Cgoban: Client for the KGS Go Server. Includes an SGF file editor for recording and reviewing game records.

Software for Playing Go on the Internet

Some go servers on the internet require you to provide your own "client", a graphic interface that converts code transmitted by the server into a user friendly visual display. Some of these programs also allow you to read sgf files.


  • GoKnot: Play or observe up to 24 games at once.

  • SmartGo: Anders Kierulf's multi-function go study tool also enables you to play and observe games on the Internet Go Server (IGS).

  • TGWin: Shareware from Stephen Richard.

  • ViziGo: Free with source code.


  • Cgoban: Client for the KGS Go Server. Includes an SGF file editor for recording and reviewing game records. See also KGS on Go on the Internet

Atari ST

  • STigc: IGS client available with source code.

Pairing Programs

  • AccelRat: Uses the algorithm that powers the AGA rating system to "rate" players, pairing those who seem closest in strength.

  • WinTD: Capable of pairing knockout, Swiss-McMahon and other formats, and generating reports compatible with the AGA rating system. An instruction manual is also available. Note: This program requires Microsoft Access 2000. A run-time version is available for users who do not have Access 2000. Write to author Chuck Robbins at chuck@ctipc.com for more information on the latest version of this program.

Other Programs

  • GoClubsOnline: Integrated online tools for managing your club's tournaments, registrations and memberships.

  • Jacoto: Java-based sgf file maintenance utility.

  • sgf2misc: A utility that converts sgf files to other popular formats.

  • Screen Saver: When your computer is idle, this utility will play through any collection of games at random on your monitor.

For Programmers

AGA Related

Here are the details and formats of how to interface with AGA-related software for pairing, tournaments, and ratings. Format for Ratings Submission

Swiss McMahon tournaments have been used within the AGA for several decades. While this has been successful in the past, the lack of written documentation presents problems for first-time tournament directors who find themselves without instructional resources. Programmers wishing to create computer pairing programs are unclear on the algorithm required to implement such a system.

To fill this gap, the AGA now presents two documents. The first, the AGA Swiss McMahon: Pairing Protocol Standards, describe how a Swiss McMahon tournament is to be paired in AGA events. The second document, AGA Swiss McMahon: Program Interface and Reporting Requirements, lays out minimal user interface standards for an AGA compliant pairing program. The AGA is prepared to certify programs that meet the combined pairing and interface/reporting standards as "AGA compliant" in a vendor-neutral fashion. Contact the AGA's tournament coordinator for details on program certification.

Pairing Protocol Standards The definition of how to pair an AGA tournament according to the Swiss McMahon system.
Program Interface and Reporting Requirements For programmers: interface standards for an AGA-compliant pairing program.
XML Schema For programmers: XML Schema for recording tournaments results.
Schema Summary in Open Document format or Excel format For programmers: Spreadsheet describing XML Schema.
Tournament Demo 1
Tournament Demo 2
Tournament Demo 3
Tournament Demo 4
For programmers: demonstration XML tournament reports written against the standard Schema.