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Go · Two players

Go for two players on one device

Standard start, full rules. Results here are kept separately and never count toward graded levels. Board Komi

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Rules

Black plays first unless the level says otherwise. Stones are placed on the intersections and never move.
A stone or connected group with no empty neighbouring points (liberties) is captured and removed.
Suicide is not allowed: you may not place a stone that would have no liberties unless it captures.
Positional superko: no move may recreate an earlier whole-board position (this covers ko).
You may pass. Two passes in a row end play. Score is your stones on the board plus empty points surrounded only by your stones, plus komi for White.
Groups that cannot escape capture are marked as dead and scored for the other side. If that is uncertain, play resumes so it can be settled. Draws do not clear a level.

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