(;
GM[1]
SZ[19]
AW[pc][nc][mc][qf][pe][bd][cf][ci]
AB[cc][dd][fd][jc][nd][qd]
LB[pe:1]
C[Problem 70. Black to play.  

If White defends with 1, Black has a brilliant tesuji to destroy White's corner. Where is it ? ]
;B[pb]
TE[2]
C[Correct Answer.  

Black 1 is a spectacular move. ]
(;W[qc]
C[If White plays 2, ... ]
;B[od]
LB[pd:A][oc:B]
C[... Black 3 threatens to link up with A or B. <= ]
)
(;W[oc]
C[Variation.  

If White connects with 2, ... ]
;B[qc]
C[... Black can live with 3. White's corner territory is completely destroyed. <= ]
)
)