(;
GM[1]
SZ[19]
AW[dg][ek][cn][dn][ho][hp][hr][jo][ko][mp]
AB[jp][jd][pj][dj][dp][pd][pp][dd][gc][co][fp][go][gn][jn][qm][hn]
TR[jo]
C[Problem 26. Black to play.  

This is the position in the game in Problem 22 after White pushed through with the marked stone. How should Black continue ? ]
(;B[ej]
TE[2]
C[Correct Answer.  

Pushing up with Black 1, pressing the three white stones against the black wall below, is severe. ]
;W[fk];B[fj];W[gk];B[gj]
C[Black continues up to 5, ... ]
;W[hk];B[ce]
C[... then plays 7 in the upper left, securing the corner and robbing the lone white stone there of its base. Black has taken a commanding lead. <= ]
)
(;B[io]
C[How the game continued.  

Black wedged in with 1, but this was gote because, ... ]
;W[ip];B[in]
LB[jr:B][jq:A]
C[... after Black connected with 3, Black A would not be a viable threat (White attaches at B and Black loses the capturing race). ]
;W[ej]
C[Therefore, White was able to use her next move to strengthen her position on the left with 4. <= ]
)
)