(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[19]KM[0.00]TM[]
PW[White]PB[Black]AW[jc][cd][ed][bg]AB[dg][cj][do]LB[bg:1]C[how should black answer white 1?]
(;B[dc]LB[cc:B][ec:C][dd:A][cf:D]CR[dc]C[RIGHT
testing move. if white answers at A, black can later live in the corner. if white answers at B or C, black cuts starting with D.])
(;B[bf]CR[bf]
;W[cf]CR[cf]
;B[cg]CR[cg]
;W[be]CR[be]
;B[bh]CR[bh]
;W[af]TR[cj]CR[af]C[white's corner is huge and the marked stone is bad])
(;B[bh]CR[bh]
;W[bf]CR[bf]C[black needs another move here, and will have bad shape while giving white a large corner])
(;B[ch]CR[ch]C[slow and gote])
(;B[cf]CR[cf]
;W[bf]CR[bf]
(;B[dc]CR[dc]
;W[dd]CR[dd]C[hard to live in the corner after the first exchange])
(;B[ce]CR[ce]
;W[be]CR[be]))
(;B[de]CR[de]
;W[dd]CR[dd]
(;B[bf]CR[bf]
;W[cf]CR[cf]
(;B[be]CR[be]
;W[ce]CR[ce]
;B[cg]CR[cg]
;W[bh]CR[bh])
(;B[cg]CR[cg]
;W[be]CR[be]
;B[bh]CR[bh]
;W[af]CR[af]C[good for white]))
(;B[cg]CR[cg]
;W[bf]CR[bf]))
(;B[ce]CR[ce]
;W[be]CR[be]C[helps white])
(;B[cg]CR[cg]
;W[bf]CR[bf]C[helps white]))