(;
GM[1]
SZ[19]
AW[dd][jq][qo][qj][qg][oc][mc]
AB[cj][dp][op][pq][qd][pe][kc][hc]
C[Problem 160. White to play.  

It is White's turn and if she plays the right move she can seize the initiative. Where should she play ? ]
(;W[qb]
TE[2]
C[Correct Answer.  

White 1 is the vital point. With this move, White makes a base for her stones at the top right and deprives Black a base for his. ]
;B[of]
C[Therefore, Black must run into the center with 2. ]
)
(;W[fc]
C[Failure.  

White 1 puts pressure on the two black stones at the top, but ... ]
;B[pc]
C[... Black turns the tables on White by attaching with 2. Black has taken nearly 10 points of territory and the two white stones at the top are under attack. <= ]
)
)