(;GM[1]FF[4]CA[UTF-8]
SZ[19]RU[Japanese]KM[0]TM[1800,0,30,5]PW[]PB[]AB[dq]AW[dp]AB[cq]AW[cp]AE[eq]AW[eo]AB[fq]AW[gp][hq]AE[gq]AB[cn]AW[dj]C[black's best move in the corner area?]
(;B[ep]CR[ep]
;W[do]CR[do]
(;B[bp]CR[bp]
;W[bo]CR[bo]
;B[bq]CR[bq]LB[co:A][dm:B][fo:C]C[RIGHT
after white defends at A or B, C remains as a cut])
(;B[fo]CR[fo]
;W[fp]CR[fp]
;B[eq]CR[eq]
;W[bq]CR[bq])
(;B[bo]CR[bo]
;W[bp]CR[bp])
(;B[fp]CR[fp]
;W[fo]CR[fo]C[bad approach]))
(;B[bp]CR[bp]
;W[bo]CR[bo]
;B[bq]CR[bq]
;W[co]CR[co]LB[ep:A]C[white is stronger than if you'd started at A])
(;B[bq]CR[bq]
;W[bp]CR[bp]C[slow])
(;B[fp]CR[fp]
;W[fo]CR[fo]C[aji-keshi. you can do better])
(;B[gq]CR[gq]
;W[ho]CR[ho]C[just reinforces white])
(;B[eq]CR[eq]C[slow])
(;B[do]CR[do]
;W[ep]CR[ep]TR[cn]C[wrong direction. you need to be prepared to sacrifice the marked stone])
(;B[fo]CR[fo]
;W[fp]CR[fp])
(;B[gr]CR[gr]
;W[hr]CR[hr]C[reinforces white])
(;B[br]CR[br]
;W[bp]CR[bp])
(;B[er]CR[er]C[slow])
(;B[dk]CR[dk]C[first take sente moves in the corner]))