(;
GM[1]
SZ[19]
AW[cf][hd][fj][dm][hb][hc][ef][eg][cp][co][md][nc][oc][pm][ql][jc][kd][ld]
AB[jp][jd][pj][dj][dp][pd][pp][dd][fp][pn][fd][cd][ee][gc][ff][dq][pc][nd][ne][gb][mq][qm][ke][le][me]
LB[mq:1][pm:2][qm:3][ql:4]
C[Problem 29. Black to play.  

After Black made a wall at the top in the game in Problem 25, he played at the bottom at 1. White attached with 2, then blocked with 4. How should Black continue ? ]
(;B[pl]
TE[2]
C[Correct Answer.  

Cutting with Black 1 is a strong move. ]
;W[om];B[qk];W[qn];B[rl]
C[With the sequence to 5, Black builds a strong position which combines well with his thick wall at the top. ]
;W[rm]
C[After White ataris with 6, ... ]
;B[ql]
C[... Black connects with 7 and ... ]
;W[po];B[qp];W[on]
LB[po:8]
C[... White must capture with 8 and 10, ... ]
;B[np]
LB[qp:9]
C[... while Black takes profit in the corner with 9 and 11. White's stones still lack eyes, so they are a good target to attack. <= ]
)
(;B[qn]
C[How the game continued.  

Connecting with Black 1 was a solid move. ]
;W[qh]
C[But when White invaded at 2, ... ]
(;B[qf]
LB[od:A]
C[... Black defended with 3, because he needlessly feared White pushing through at A. ]
;W[qj]
C[This gave White the chance to establish a position on the right side by attaching at 4. As it was, White was gradually catching up. <= ]
)
(;B[qj]
LB[qf:@]
C[Instead of @, Black should have made an iron pillar with 3. White would then be in trouble. <= ]
))
)