(;
GM[1]
SZ[19]
AW[dc][fc][cd][ce][dp]
AB[cf][de][df][pp][pj][pd]
LB[de:1][ce:2][cf:3][cd:4][df:5][fc:6][pj:7]
C[Problem 13. White to play.  

After White 6, Black does not complete the joseki, but rushes to make a sanren-sei with 7. What should White do ? ]
(;W[dj]
TE[2]
C[Correct Answer.  

White should pincer Black's stones with 1 to make them heavy. ]
;B[ge]
C[If Black escapes into the center with 2, ... ]
;W[hd]
C[... White takes profit at the top with 3 while keeping up the pressure on the black stones. <= ]
)
(;W[jp]
C[Failure.  

White 1 is a good move because it erases the influence of Black's sanren-sei. However, it is bigger to attack the black stones on the upper left side. ]
;B[dj]
TR[pj]
C[Black has now played the important moves of 2 and the marked stone on the right side. <= ]
)
)