Can someone explain to me why the group at the bottom is not Seki? I cannot see a way for black to kill white or the other way round, but the AI marks it as white dead
The status of white’s group in the lower left is a bit ambiguous.
Black can kill it by playing A2, or white can make a ko by playing A2.
However, realistically white can’t win that ko due to a lack of ko threats, so I’d say white’s group is dead either way.
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Thanks for response. Does AI take ko threats into account when scoring? Presumably not?
I think it’s AI with low playouts, so it does take into account ko threats, but in a complicated board situation it can make mistakes.
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+1
If we take the complete 9 x 9 final position into account, I see a black group with three eyes. Therefore Black’s group can never be killed.
A seki next to a living group is just not possible.
If it is white’s turn, white could play A2 and start a ko (if there would have been ko threats that black has to answer to).
living group that enclosed another group.
Edit: was not as black and white as I thought 
