Hactar 1.2 features (not complete):
* Play go in 9x9, 13x13 and 19x19 boards.
* About 1 dan at 9x9 and 4kyu in 19x19.
* Play capture go, and capture 3 stones.
* Continue game after interruption.
* Review played games.
* Over 230 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).
* Optionally disable color randomization and rotation for added tsumego collections.
* View and edit SGF files. Opens files directly from browser.
* View UGI and GIB formats and convert it to SGF.