I thought I’d show how advantage can disappear without one even noticing, with some help from the OGS bot and my last game (I was Black.)
Black WR 75% --> 50%. This looks like a natural move, preventing White from getting thick on the side, but on closer inspection it’s revealed to be slow.
Black WR 50% --> 40%. A bad exchange, helping White secure the centre – better to just crawl at [square].
Black WR 30%. Not quite sure why the bot hates this move though. Might just be a misread. I do lose a ko threat unnecessarily but bots tend not to care about that…
Black WR 30% – 15%. Presumably the bot thinks I shouldn’t make this exchange and I should instead just live with A, and then fix at B if needed. I’m inducing White to harm my ponnuki, so it makes sense.
Black WR 15% – 8%. I’m getting too busy, again endangering the ponnuki. I should just push out with [square].
Total length of slip: six moves
White also pulls off a sweet maneouvre after I ignore 216.