(;
GM[1]
SZ[19]
AW[jc][oc]
AB[dd][hc][qd][pe]
C[Problem 14. Black to play.  

White is overextended. Where should Black invade in this position ? ]
;B[lc]
TE[2]
C[Correct Answer.  

Black 1 is the correct invasion point. ]
(;W[oe];B[of];W[ne]
LB[oe:2]
C[If White plays 2 and 4, ... ]
;B[le]
C[... Black jumps to 5. <= ]
)
(;W[je]
C[Failure for White.  

If White jumps to 2 with her stone on the left, ... ]
;B[nd]
C[... Black confines the white stone on the right with 3. White's play here is unsatisfactory. <= ]
)
)