Learn something from every game you play on OGS

Follow your online-go.com account and pick the games you want reviewed: the costliest mistakes, found by KataGo and explained in plain English, each led by the lesson to take into your next game.

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Example lesson · Move 26

When your opponent's contact move just connects their own groups on a partly settled side, tenuki and take the biggest point elsewhere.
Each lesson comes with the board, KataGo's line, where the points went, and how often players at your rank make the same choice.
  1. Enter your OGS username

    Your finished games are listed, and new ones show up within about 10 minutes.

  2. Pick a game to review

    Each review uses one credit, and your first 2 are free. It's ready in a few minutes.

  3. Read the lessons

    Every game lists its biggest lesson; open it for the full review with boards and lines.