(;AB[cd][gc][dj][cn][pd]AW[ec][ee][dp][fq][qq]SZ[19]TR[ee]C[Black's response to the marked play?

Source:
    American Go Journal, Fall 1992
    "How to Choose Joseki", by Yilun Yang];C[Hint:  A or B?]LB[df:a][cg:b]

(;B[df]C[The proper move.  Black develops the left side and threatens White's upper left group.];W[hd]C[White can follow this sequence, but ...];B[dc];W[hc];B[eb];W[fc];B[fb];W[gb]C[... Black's left side stones are well-placed, and locally Black gets more profit than White.])
(;B[cg]C[This 2 point extension creates a low strong position, but doesn't work well with the lower left position.];W[hd]C[Again, White can follow this sequence.];B[dc];W[hc];B[eb];W[fc];B[fb];W[gb]TR[dj]LB[dk:a]C[Now Black's marked stone is too close to the strong upper left corner.  Black would rather have the marked stone at A.]))
