This is a game played on June 19 between Ueno Asami (as black) and Fujisawa Rina (as white). At move 159, Asami cut with K14.

It involves a followup of the life and death of the white group M10, and most human players would be able to judge it, but AI (from Golaxy to Katago) all seem to deem it “alive” and continue to fight without securing the life of that group first. While a human player can read out the sequence like Rina did during the game and make the right choice.

But it takes like 10k+ playouts before AI realize the K14 cut is a very good move, and (with few playouts AI even judges K14 as a blunder). And it takes millions of playouts before AI realizes the M10 white group is in trouble.

What other AI blindspots and hallucinations have you seen in real games?