(;
GM[1]
SZ[19]
AW[fc][gd][ge][fe][cn][en][bp][pp][qj][pd][pf]
AB[dd][ed][ec][fd][df][dk][dp][cq][fq][nc][kd]
TR[qj]
C[Problem 71. Black to play.  

White has just played a big point on the right side with the marked stone. Where should Black attack ?  

[You will find a supplement to this Problem Diagram as "Problem 141"] ]
;B[dm]
TE[2]
C[Correct Answer.  

Black should destroy the shape of White's stones by peeping with 1, ... ]
;W[dn];B[cm]
C[... then blocking with 3. Besides making the white stones heavy, Black has reinforced his position on the left. If White again plays elsewhere ... ]
;W[nq]
C[Suppose that White reinforces her position in the lower right with 4. ]
;B[bn];W[bo];B[bm]
LB[bn:5]
C[Black will hane and connect with 5 and 7. ]
;W[bq]
C[If White crawls to 8, ... ]
;B[iq]
LB[co:A]
C[... Black will strengthen his position by extending to 9 and wait for a chance to cut at A. <= ]
)
)