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GM[1]
SZ[19]
AW[id][jc][ld][qf][pj]
AB[dd][df][dj][ic][jd][me][nd][pd]
C[Problem 61. Black to play.  

A ladder towards the left would be favourable for Black. What is his strongest play ? ]
;B[je]
TE[2]
C[Correct Answer.  

Since the ladder is favourable for Black, 1 is a powerful move. ]
;W[hc];B[ib];W[hb];B[jb];W[kc];B[kb];W[lb];B[mc]
C[With the moves to 9, White's stones at the top are in trouble. Next, ... ]
;W[lc];B[hd]
C[... Black ataris with 11, but, ... ]
;W[ie];B[if];W[he];B[gd];W[hf];B[gc]
C[... after the moves to 17, ... ]
;W[le];B[jf];W[lf]
LB[le:18]
C[... White must escape into the center with 18 and 20. ]
;B[hg]
C[After Black 21 the top left quarter of the board is dominated by Black. <= ]
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