(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[9]KM[0.00] PW[White]PB[Black]SO[Go Training v. 2, prob. 5]AW[cb][db][eb][gb][cc][dd][ff]AB[dc][ec][fc][bd][cd]TR[dd]C[This problem is problem 5 from volume 2 of the Nihon Ki-in's 'Understand the Basics: Go Training' book. Black to capture the marked White stone.] (;B[de]CR[de] ;W[ed]CR[ed] (;B[fe]CR[fe] (;W[fd]CR[fd]C[CHOICE] ;B[gd]CR[gd] ;W[ee]CR[ee] ;B[ef]CR[ef]C[RIGHT]) (;W[ee]CR[ee]C[CHOICE] ;B[ef]CR[ef] ;W[fd]CR[fd] ;B[gd]CR[gd]C[RIGHT])) (;B[ee]CR[ee] ;W[fd]CR[fd] ;B[fe]CR[fe] ;W[gd]CR[gd])) (;B[ed]CR[ed] ;W[de]CR[de]) (;B[ee]CR[ee] ;W[de]CR[de] (;B[ce]CR[ce] ;W[df]CR[df]) (;B[df]CR[df] ;W[ce]CR[ce] (;B[be]CR[be] ;W[cf]CR[cf] ;B[cg]CR[cg] ;W[dg]CR[dg] ;B[bf]CR[bf] ;W[ef]CR[ef]C[White has broken out of Black's trap.]) (;B[ef]CR[ef]C[A full triangle is generally considered a good thing, but White is still poised to escape.]))))