(;
GM[1]
SZ[19]
AW[cn][cq][dq][er][fq][gr][gp][hp]
AB[dp][pd][pp][dd][jj][dj][cp][ep][eq][fp][fo][go]
LB[dj:2][cn:1][cp:8][ep:12][eq:10][fp:4][fo:6][go:14][gp:5][hp:15]
LB[fq:3][cq:7][dq:9][er:11][gr:13]
C[Problem 129. Black to play.  

What should Black do after White 15 ? ]
(;B[ho]
LB[ip:A]

TE[2]
C[Correct Answer.  

Black should push with 1, threatening to hane at A. ]
;W[io]
C[White cannot let this happen, so she will hane at 2. ]
;B[in]
C[Next, Black exchanges 3 ... ]
;W[jo]
C[... for White 4, ... ]
;B[cj]
C[... then secures the left side with an iron pillar at 5. Black has taken a big lead in the opening of this five-stone handicap game. <= ]
)
(;B[dm]
C[How the game continued.  

Attacking the lone stone on the left side with 1 was a backward move which resulted in Black's stones in the lower left becoming overconcentrated. ]
;W[cf]
LB[bj:A]
C[White responded with an approach move at 2 which left open the possibility of reducing Black's territory in the lower left by sliding to A. ]
;B[fd]
C[(This move is here meant to get 'White to move'.) ]
;W[bp]
C[White could also reduce this territory by playing the sequence from 4 ... ]
;B[bo];W[bq];B[co]
C[... to Black 7. <= ]
)
)