• Loads go problems that are stored in the standard SGF format.
  • Allows refutations of incorrect answers to be included in the problem files.
  • Remembers where you were when closed and restarted.
  • Can save progress through problem sets to file, so you can go work on a different set of problems, and then pick up where you left off.
  • Filters the available problems based on tags associated with the problems, e.g. Life and Death, Tesuji, etc.
  • Allows the selected problems to be sorted in various orders - by difficulty, random, etc.
  • Keeps statistics on the number of problems that have been correctly solved in the set, and long-term stats for each collection of problems.
  • Allows import and export of problem sets.
  • Allows editing of the current problem in an external SGF editor
  • Splits files containing multiple problems for use with GoGrinder.
  • Comes with 347 problems, ranging in difficulty from 25k - 4d.
  • Thousands more problems are available for free on the internet - links provided in the documentation.

Translated to:

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