Peep problem

First time using the forums so hope I’m posting in the right category :see_no_evil:
I came across this problem…but the answer seems a bit strange, doesn’t it? I think they just put the diagrams in the wrong order, as the explanation of diagram 8 makes sense with diagram 9 picture, and vice versa:

But my friend thinks the actual answer it’s diagram 9 picture (the diagonal move)
What do you think? :face_with_monocle:

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Agree. Diagrams were swapped. The one with option C should be Diagram 9

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I can also confirm from recalling some online teaching lectures from pros that the textbook-correct peep is the knight’s move in this shape, not the diagonal, which is consistent with the diagrams being swapped.

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Swapped. May you tell us where the mistake was, could interest more people (and even the writer could correct)?

The diagrams are indeed swapped. However, the text in the Diagram 9 paragraph about “attempt of White to defend the cutting point in sente through exchanging White A and Black B” being bad is wrong rather than a typo, though was standard theory I also learnt pre-AI. In a similar (but not same) position in the British championship a few years ago my opponent solidly connected and it was the biggest mistake of the game so far (-27%, see move 35 of Uberdude's journal • Life In 19x19): he should have played the “crude” pushing-in move, even though it does allow the 2nd line sente peep (or choice of trade), in order to get sente because that was more important. I checked this position with shallow KataGo and it’s true here too.

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