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Basic course - Invasion lesson 2B is online now. This is a lesson for kyu players. 

Black to invade, A or B?

I wish you a fun weekend!

The problem set for Magic sword series lesson 3 is online now. This is a lesson for stronger players.

White to play next, A or B?

Basic course - Invasion lesson 2A is online now. This is a lesson for kyu players. 

Black to invade, which move is the best?

I wish you a wonderful weekend!

Basic course - Invasion lesson 1 is ready for you. This is a lesson for kyu players. 

White to play next, A or B?

Dear students, 

I will take a vacation from October 1st to October 7th. 

Thank you all for your great support! 

Guo Juan 

The problem set for Magic sword series lesson 2 is online now. This is a lesson for stronger players.

Upper right White to play, A or B?

Lower left: Black tries to cut, what now?

Have a wonderful weekend!

Profit from mistaks lesson 5 is ready for you. This is a lesson for kyu players. Enjoy!

White invades with move 1. Next A and B, which move would you play for Black? 

I have started a huge project, make the problem sets for the Magic sword series. Please wish me good luck :)

Here is the problem set for lesson 1. This is a lesson for stronger players.

White to play next, A or B?

Have a nice weekend!

Today, I have another lesson about direction of play, I call it 'Brothers don't fight each other'. Have fun.

White to play next, A or B?

Invasion shape by shape 11F is online now, This is a lesson for intermediate level. enjoy! 

White to invade next. Normally, which moves are good and which are not?