(;
GM[1]
SZ[19]
AW[dc][fd][nc][ob][qg][qj][cn][ci]
AB[dp][pd][pp][jd][oc][qe][ql][jq][fp]
C[Problem 148. Black to play.  

With the hane of 1, White threatens to uproot the black stones in the corner. Take a global view of the position before deciding on Black's response. ]
(;B[nd]
TE[2]
C[Correct Answer.  

This problem shows the importance of playing for thickness on the outside instead of defending the territory in the corner. Black plays on top with1 and ... ]
;W[md];B[mc];W[nb];B[lc];W[qc]
C[... lets White secure a small territory in the corner, ... ]
;B[me]
C[... but the thickness Black gets up to 7 strategically affects the whole board. ]
;W[pc];B[od]
C[<= ]
)
(;B[pb]
C[Failure.  

Defending the corner with Black 1 ... ]
;W[od]
C[... lets White force with 2. ]
;B[pc];W[lc]
C[She then occupies the key point of 4. ]
;B[ke]
C[If Black escapes into the center with 5, ... ]
;W[mf]
C[... White jumps to 6 and the two black stones at the top suddenly find themselves under attack. <= ]
)
)