(;
GM[1]
SZ[19]
AW[cc][qq][qp][qn][nq][mp][cq][dp][fp]
AB[pd][pp][oq][nr][np][no][kp][bp][cn][ck]
LB[jc:A][iq:D][qf:B][qk:C]
C[Problem 149. White to play.  

The joseki played in the lower right corner has ended in sente for White. There seem to be a lot of big points for her to play, but which one is the biggest ? ]
(;W[iq]
LB[hq:A]

TE[2]
C[Correct Answer.  

White 1 is the biggest point. To convince you that it is really big, imaging the difference if Black were to play at A. ]
;B[nc];W[qk]
C[<= ]
)
(;W[jc]
C[Failure.  

Another big point, but it takes no actual profit. ]
;B[hq]
LB[fr:A]
C[Black plays 2. He is now threatening to slide at A, uprooting the white stones there. <= ]
)
(;W[qk]
LB[ql:A]
C[Failure.  

White 1 here defends against Black A. <= ]
)
(;W[qf]
C[Failure.  

If White 1 here, ... ]
;B[nd]
C[... Black will jump to 2, and another move on the side becomes necessary. <= ]
)
)