Try this puzzle!

It’s about a fight at right above. Now white is trying to settle. In the situation, black has the chance to take the initiative. What should black do now?
( you must consider the direction )
( sdk or higher level )
I will show the answer using reply.
Also I will post different puzzles or questions in my discord channel. If you are interested in, here’s the link.

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This is the answer.

After playing black 1, the six x black stones are getting stronger.
Also the black can use the weak group of white continue reducing the moyo.

If you choose the wrong wrong direction to attack.

White take the vital point and the black group at middle getting weaker.
After few moves, you can see the difference between two variations. The weak group of white now connect to the moyo and build a wall.