(;
GM[1]
SZ[19]
AW[dd][dj][dp][fp][gp][hq][iq][pb][nc][kc]
AB[gq][hp][ho][jp][jq][pq][po][pk][pd][pf][qc]
C[Problem 170. Black to play.  

Where should Black play so as to decrease the size of White's moyo while increasing the size of his own ? ]
;B[le]
TE[2]
C[Correct Answer.  

Black should expand his moyo with 1. ]
;W[jd]
C[If White defends with 2, ... ]
;B[jf]
C[... Black continues to expand with 3. The scale of Black's moyo is now larger than White's. <= ]
)
)