(;
GM[1]
SZ[19]
AW[ch][je][jc][lc][rb][qb][qc][pc][rd][qe][qf]
AB[dc][cf][hc][ne][nc][pe][pd][qd][rc][pb]
LB[rb:2][rc:1]
C[Problem 112. Black to play.  

To avoid the threats in Problem 109, White plays 2. What is Black's response ? ]
(;B[re]
TE[2]
C[Correct Answer.  

Black ataris with 1, ... ]
;W[sc];B[qg]
C[... then makes the nose attachment of 3. ]
;W[rf]
C[If White 4, ... ]
;B[pf]
C[... Black presses from above with 5. <= ]
)
(;B[ng]
TE[2]
C[Correct Answer.  

Black may not want to play the moves in the Correct Answer immediately. He could first jump to 1 to eliminate any danger to his group. ]
;W[he];B[re];W[sc];B[qg]
LB[re:3]
C[After that, he plays 3 and 5, looking on these as forcing moves. ]
;W[rf];B[fc]
C[<= ]
)
)