(;
GM[1]
SZ[19]
AW[ic][md][nc][mb][od][kd]
AB[dd][gc][oc][pc][qd][qf][jb][jd][lc]
LB[jd:3][kd:2][jb:1]
C[Problem 42. White to play.  

How does White respond to Black 3 ? ]
(;W[jc]
TE[2]
C[Correct Answer.  

White should push through with 1 and ... ]
;B[kc];W[ld];B[ib];W[hc];B[hb];W[je]
LB[id:A]
C[... play the moves to 7. This is joseki. Black can still play A, leading to a complicated fight. <= ]
)
(;W[pe]
TE[2]
C[Correct Answer.  

White can avoid complications by first exchanging 1 ... ]
;B[qe]
C[... for 2 ... ]
;W[jc]
C[... before playing 3. ]
;B[kc];W[ke];B[ib];W[hc];B[hb];W[ie]
LB[ld:A]
C[This defends against Black pushing through at A after White 9. White gets nice thickness with the joseki to 9. <= ]
)
)