KyuExercise188/Attempts

Black kills  

a and b are miai.

at , at , black kills  

This may seem stronger, but black plays the two stone edge squeeze and white's plan comes to naught.

a and b are still miai.

Black avoids hamete and kills  

This is potential hamete, trying to set up the under the stones tesuji. is correct; black must resist the temptation to play at a.

Black is tricked (variation A)  

After it may seem to black that all is well...

Black is tricked (variation A)  

...but after sacrificing 4 stones, white captures 3 at to make life.

Black is tricked (variation B)  

Even if black sees his mistake and tries to remedy it with and , aiming at a throw in and shortage of liberties, plays at the vital point...

Black is tricked (variation B)  

...and makes miai of a and b.