(;FF[4]SZ[9]GM[1]AP[GOWrite:3.1.1]ST[0]CA[UTF-8]AB[hf][eg][ed][gd][ig][de][eh][gh][hh][he][df][ei]PM[2]AW[dg][gg][hg][be][dh][fh][di][cf][ef][ff][gf][bg]FG[259:]
(;C[Attempting to connect underneath fails.]B[fi];C[White throws in]W[gi];B[hi];W[fg];B[gi]
;C[White throws in again.]W[ih];C[But now Black has only one liberty.]B[ii];W[ih])
(;FG[259:]PM[2];C[This descent is the key move.]B[gi];C[ ]W[fg];B[fi]C[After this, White cannot reduce Black's liberties without self-atari.]))
