Hactar Go

    Keywords: Software

Hactar Go is go program for Android. Currently it is available from [ext] Google Play. Somewhat limited [ext] Free version (server provided services as subscriptions) is also available.

Hactar Go
Author: Lauri Paatero
License: proprietary
Price: 3.2 / free (2015-08-01)
Category: player, editor, problems trainer, search database
Operating system: Android
Reads format(s): SGF NGF UGI GIB
Writes format(s): SGF
Languages: English, Finnish, Italian, Japanese, Russian, Polish, Turkish, Korea
Development status: Active development
Homepage: [ext] https://play.google.com/store/apps/details?id=net.gowrite
Strongest play: 3dan (2016-12-09)
Infos last checked:

Currently Hactar Go is localized to English, Finnish, Italian, Japanese, Russian, Turkish and Korea. If you want to have your own language, please [ext] create one!

Hactar does multiple things:


  • Play go in 9x9, 13x13 and 19x19 boards.
  • About 1 dan at 9x9 and 4kyu in 19x19.
  • 3 dan engine at 19x19 as additional subscription service (or fixed-time purchase). Engine is based on darkforest (MCTS version).
  • Play capture go, and capture 3 stones (and capture 5 unlocked later when all capture 3 levels are won).
  • Continue game after interruption.
  • Review played games.


  • Over 400 problems, including correct answer and multiple wrong variations.
  • Random color and rotation for problems.
  • Easily add own tsumego collections, supports all common formats (VW, TR, BM, RIGHT&WRONG). Just few touches to download over 400 gogameguru.com problems!
  • Optionally disable color randomization and rotation for added tsumego collections.
  • Widget to show current problem in homescreen.

Search games

  • Search games based on position or player.
  • Search games stored in device.
  • Search games from internet. Search covers over 90000 pro games and over 110000 amateur games. (Very small database in lite)

Sgf Viewer / editor

  • View and edit SGF files. Opens files directly from browser.
  • Multiple game list formats. Preview when opening files from SD card.
  • View UGI and GIB formats and convert them to SGF.
  • Supports all normal SGF features.
  • Score estimator to estimate / count score.

Most recent Hactar version works on Android 5.0 and later.

Hactar Go last edited by on July 6, 2020 - 03:13
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