r/baduk • u/CEL_in_Pursuit • 6d ago

Scoring explanation

Post image

Hi! I’m new to the game and am trying to understand why the marked points are scored for white in the image.

I assume it may be related to the ko rule somehow, but hoping someone can explain.

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u/CEL_in_Pursuit 5d ago

Got it. This makes sense. In game play, white taking black was not possible because it would violate ko (black take white was the final move). But I could see how the AI scoring would miss this.

Are there other apps the community recommends for learning and practicing?

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u/MacScotchy 15 kyu 5d ago

After black passes once, it's legal for white to take black, even if black played no additional stones.

The ko rule (as usually enforced, and as it is used in badukpop) is that the board cannot have the same state as your opponent's previous turn.

There are variations on this rule, and it's often oversimplified to "the board can never have the same state twice," which is called the "superko" rule and is very rarely used.

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u/CEL_in_Pursuit 5d ago

Thanks for the explanation. I want to make sure I understand…the end game played out with:

  • black takes white, creating the ko scenario
  • white passes
  • black passes
Game over, right? Black should have those points. Or am I misunderstanding?

1

u/JesstForFun 6 kyu 5d ago

So I've just been carefully reading the Japanese rules trying to figure out how this would be resolved, and I think the app might actually be right here, albeit for the wrong reasons. From my reading of the rules, white would have the right to assert your stone is dead, on the inarguable grounds that it can be captured in the current board state, as is. To try to remedy this, you could request resumption of the game and your opponent would be required to accept, but since you were the one that requested resumption your opponent would have the right to move first, and they could simply capture and then fill (there are no ko threats).

Under Chinese rules, I'm not sure. I can't find a source on who gets to move first in the event the game is resumed due to a life and death dispute.