(;
GM[1]
SZ[19]
AW[qf][cn][hq][nq][fl][dl][cp][co][bp][dg]
AB[pj][dj][dp][pd][pp][dd][fc][nc][fq][qm][fj][bo][bq][cq][fo]
LB[fl:2][fj:1]
C[Problem 57. Black to play.  

After the sequence in the game in Problem 53, Black 1 and White 2 were exchanged. Where should Black play next ? ]
(;B[fg]
TE[2]
C[Correct Answer.  

Black caps at 1 to keep the lone white stone there under control and to prevent it from doing any damage. ]
;W[cd]
C[Before escaping into the center, White first makes shape for her stones with 2 ... ]
;B[cc];W[de];B[ed];W[be]
C[... to 6. ]
;B[bc];W[ff];B[gg]
C[Even if White lives, Black is not unhappy because he has taken the corner and become strong in the center with 9. <= ]
)
(;B[cf]
C[How the game continued.  

Black played 1 to prevent White from making a base. But this cannot be considered a good move ... ]
;W[cg]
LB[ce:A]
C[... because it provoked White to strengthen her stone with 2 (Black A would have been the appropriate move here). Black's two stones on the left side are were now more vulnerable than before. See Problem 61 for the continuation. <= ]
)
)