Okay, I promise this is my last use of the hashtag tonight, but #baduk, can someone give me advice on how to avoid what happened to me in the end game here?

Basically, I had the game locked, or so I felt (the engine appears to disagree with me), and then I just plain lost a whole southwest area.

Did I need to build in eyes or something?

Was there a better way I could have responded to their invasion?

(also, is there a "go help" hashtag I can use?)

online-go.com/game/66216892

@b4ux1t3 aisensei.com suggests b5 instead of c4 for move 20.

I usually use all of the following hashtags when talking about the game:

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