(;FF[4]
CA[UTF-8]
GM[1]
GN[Plateau de démonstration]
PC[https://online-go.com/review/1426891]
PB[Noir]
PW[Blanc]
BR[3p]
WR[3p]
OT[Error: time control missing]
RE[?]
SZ[19]
KM[6.5]
RU[Japanese]

;AW[sa]
;AW[ra]
;AW[qa]
;AW[qb]
;AW[qc]
;AW[qd]
;AW[rd]
;AW[re]
;AW[rf]
;AW[sf]
;AB[rb]
;AB[rc]
;AB[sd]
;AB[pa]
;AB[pb]
;AB[pc]
;AB[pd]
;AB[qe]
;AB[qf]
;AB[qg]
;AB[rg]
;AB[sg]
;AB[pe]
;B[sc]C[Seki or dead?]
(;W[jd]C[White plays away]
;B[sb]C[Black can play again inside.]
;W[se]
;B[sc]C[Do you know this shape? It's a useful one]
(;W[sb]
;B[rc]
)(;W[rc]
;B[sb]
)(;W[dd]
;B[rc]
(;W[ed]
;B[sb]
;W[fd]
;B[rb]
;W[sd]
;B[rc]
;W[sc]
;B[rb]
;W[sb]
;B[rb]
;W[rc]
;B[rb]
)(;W[sb]
;B[rb]
;W[sd]
;B[rc]
)))(;W[sb]C[White cannot approach, as it's self-atari.]
;B[se]
))