(;
GM[1]
SZ[19]
AW[dd][cc][bc][gc][qj][oj][qn][pn][po][dp][cn][dj]
AB[cd][ce][de][kc][od][qd][qh][qo][qp][pq][op][jp][fq]
LB[cd:A][cc:B][ce:C][bc:D][de:E]
C[Problem 102. White to play.  

How should White play after the skirmish to Black E in the upper left ? ]
(;W[ed]
TE[2]
C[Correct Answer.  

White should calmly extend to 1, ... ]
;B[ch]
C[... allowing Black to extend to 2. ]
;W[cj]
C[White then secures the lower left with 3. ]
;B[eh]
C[In the end, Black must secure his stones by jumping to 4. <= ]
)
(;W[cg]
C[Failure.  

The pincer of White 1 is not good. ]
;B[ed]
C[Black can get good shape by playing an atari at 2, ... ]
;W[dc];B[ff]
LB[ee:B][dg:A]
C[... then jumping lightly to 4. Black could also make sabaki by attaching at A or connecting at B. <= ]
)
)