Tesuji From Games 2 / Attempts

Solution  

zinger: Ok, here's my try. Black can kill white's group with a, so white needs to live. Playing at a works, but does nothing else. also lives, and is a point or two better. But is even better, as it threatens to make a second eye by descending to . If now , white lives with . Perhaps this is an example of force before defending.

Truc: at also works. I think it's the same point wise.

Inferior  

unkx80: here is inferior, because is sente (threatening a), and forcing . White loses one point this way.

White First  

White wins by a point when he starts first.

Black First  

Black wins by a point when he starts first.

So whether white should play or in the original diagram depends on the rest of the board.

-Truc

unkx80: Yes, you are right... meaning that I am speaking nonsense once again.