(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[White]PB[Black]AW[ea][eb][ec][dd][be][ce][de][fe][bf]AB[da][cb][db][bc][bd][cd]C[Two empty triangles!? White to cause trouble.]
PL[W]
(;W[ba]
(;B[ab]
(;W[bb]
;B[ad]LB[dc:A]C[Black should really have played at A (d17). Can you see how to take advantage?]
(;W[cc]
;B[dc]C[Seki and White keeps sente. Nice. RIGHT])
(;W[ae]
;B[ca]C[So close..])
(;W[dc]
;B[cc]
;W[ae]C[Well done, seki. Now go back and do that in sente. RIGHT]))
(;W[ad]
;B[dc]
;W[bb]C[Seki RIGHT])
(;W[dc]
;B[ad]
;W[bb]
;B[cc]
;W[ae]C[Seki RIGHT]))
(;B[dc]
;W[bb]
;B[ab]
;W[ad]C[Seki RIGHT])
(;B[ca]C[Mistake by black.]
(;W[dc]
;B[bb]
;W[ad]
;B[ac]
;W[aa]C[Dead RIGHT])
(;W[bb]
;B[ab]
(;W[dc]C[Dead RIGHT])
(;W[cc]
;B[aa]C[Black lives.])
(;W[ad]C[Dead RIGHT]))
(;W[cc]
;B[bb]C[Black lives.])
(;W[ab]
;B[bb]
(;W[dc]
;B[ac]C[Black lives])
(;W[ad]
;B[ac]C[Black lives.])
(;W[aa]
;B[dc]C[Black lives]))
(;W[ad]
;B[bb]
;W[dc]C[Dead. RIGHT])))
(;W[ab]
;B[ba]
(;W[ad]
;B[ac]C[Black lives.])
(;W[cc]
(;B[bb]C[Black lives.])
(;B[dc]
;W[bb]
;B[ac]C[Black lives.])))
(;W[ad]
;B[ba]C[Black lives])
(;W[dc]
;B[ba]C[Black likes this.])
(;W[ac]
;B[ad]C[Black thanks you for this.]))