(;
GM[1]
SZ[19]
AW[dd][ec][df][dp][jq][jd][jg]
AB[pq][po][pj][pd][md][fc][fd][gg]
TR[pj]
C[Problem 45. White to play.  

Black has just staked out a position on the right side with the marked stone. What should White do next ?  

[You will find a supplement to this Problem Diagram as "Problem 140"] ]
;W[hd]
TE[2]
C[Correct Answer.  

White 1 is the vital point; it makes the difference between Black being attacked or White. ]
;B[ff]
C[Black must defend with 2, ... ]
;W[dh]
C[... and White stakes out the territory on the left side by jumping to 3. <= ]
)
)