(;
GM[1]
SZ[19]
AW[dd][dc][df][ch][bg][co][dp][gq][jq][rp][rn][sn][sm][qm][ql][rl][qk][qj][pj][qi][ri][qh][qd][rd][qa][pa][pb][pc][oc][od][oe][mb][mc][lc][kc][kd][kb][jb][hb][hj][nk]
AB[bh][cj][cm][oq][qp][qn][qo][ro][so][rh][sg][rf][re][qe][pe][pd][qc][rc][qb][ra][ne][nf][md][ld][nb][ib][ic][jc][jd][je][ke][fc][fe][gi][pk][ok][oj][ol][pi][ph]
TR[hj]
C[Problem 111. Black to play.  

White has just played the marked stone in an attempt to reduce Black's moyo. What should Black do ? ]
;B[gj]
TE[2]
C[Correct Answer.  

Black should exchange 1 ... ]
;W[hk]
C[... for 2, ... ]
(;B[ip]
C[... then lean on White's stones at the bottom with 3 ... ]
;W[iq];B[gp]
C[... and 5. ]
;W[hp];B[ho];W[hq]
C[After the sequence to 8, ... ]
;B[fl]
C[... Black can play 9, and the two white stones in the center are trapped inside Black's moyo. <= ]
)
(;B[eq]
C[Failure.  

The game continued with Black 3 ... ]
(;W[dq];B[dr]
C[... and 5. These moves were not good because it gave White a chance to rescue her two stones in the middle. ]
;W[cr];B[gp]
C[Black resumes the attack with 7. <= ]
)
(;W[ep]
LB[eq:3]
C[White's best strategy.  

After Black invaded at 3, White should force Black to live in the corner ... ]
;B[fq];W[gp];B[cq]
C[... with the sequence to 7. White ends in sente, so her two stones in the center can now easily escape; Black's moyo has been erased. <= ]
))
)