@ ; Ko: ; ; ;

///:

:
However, one liberty of White's centre group depends on ko, so Black can do better than shown above. He is able to connect the hanezeki's tail with his first move.

To win the ko-fight, White uses one of her own ko-threats now; but unnecessary, as we will see later.

:
As usual with the shared ko, Black will need one external ko-threat (as many as White) to make his move at possible (not explicitly shown here).