(;
GM[1]
SZ[19]
AW[dd][gc][dj][cn][dp][po][pn][qn][qj][oj]
AB[cc][fq][jp][op][pq][qp][qo][qh][qd][od][kc]
TR[cc]
C[Problem 97. White to play.  

Black invades the corner with the marked stone. How should White respond ? ]
;W[cd]
TE[2]
C[Correct Answer.  

White should block at 1 and build a moyo in the upper left. ]
;B[dc];W[ec];B[eb];W[fb];B[ed]
C[After Black exchanges 6 ... ]
;W[fc]
C[... for 7, ... ]
;B[bd];W[be];B[bc];W[cf]
(;B[db]
C[... Black lives in the corner with the sequence to 12, but ... ]
;W[ee]
LB[mc:A]
C[... White gets a thick position after playing 13. Since she is thick on the left side, White can now aim to invade at A. <= ]
)
(;B[ee]
LB[db:@]
C[Variation.  

Instead of @ in the preceding diagram, Black might first extend to 12 ... ]
;W[df];B[db]
C[... before connection at 14. ]
;W[ff]
C[Next, White traps the two black stones with 15. <= ]
)
)