AI based score estimation and auto-scoring is now live

[Vsotvep]

So, I mean the following algorithm:

• KataGo checks the position with White having next move
• KataGo checks the position with Black having next move
• Any discrepancy between these two is marked as “unsettled”, the rest is marked as “settled”.
• Chains of unsettled area (open intersections + unsettled stones) are considered as a whole.
• If a chain has empty intersections bordering on settled stones of both colours, this is a dame
• Else, if the number of unsettled Black stones is larger than the number of unsettled White stones, mark the territory as Black
• Else the number of unsettled White stones is larger than the number of unsettled Black stones, mark the territory as White
• If the numbers are equal, leave the territory without mark (so like dame)

@shinuito

The second is unsettled groups right? I think something involving a seki will do the job eg below

I think attacker and defender are vague concepts when a group can live in seki, but definitely Blacks one stone in the corner at S19 is “dead” but can live in seki with one move, and has much less stones than the surrounding group.

Maybe I’m misunderstanding what you’re saying, it’s not clear to me.

The Black stone has the majority in their area, since the white stones are unconditionally alive (either in seki or just in general) and thus would be counted as settled.

Still, this would be an example where the Black stone is marked as alive, while the players probably think it’s dead.

@shinuito

I don’t really know how to pick this apart. I need an unsettled group with less stones that the attacking ones? It has to look alive to weak players? Like should I think of a fully surrounded bent four or fully surrounded 6 point eyespace in the corner

The “dead” stones can have hundreds of stones less than the surrounding ones?

This is exactly the kind of thing where SE could give away that the group is killable or can become seki, to White. If both players pass with these shapes on the board, either neither of them knows there is something to do (likely) or they both forgot about it by accident (in which case they probably see it marked as Black in the scoring stage, but then can resume the game to play it out).