White is down on points so he must resort to drastic measures. A previous play at E3 separates the black groups and L2 confines black to a dead shape... Or so white thinks. How can black punish white?
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[13]HA[2]KM[0.00]
PW[Dan Rosen]PB[Maja Catipovic]AW[ec][fc][gc][cd][dd][ed][be][ee][fe][cf][df][gf][lf][bg][eg][gg][lg][bh][fh][hh][ih][kh][ai][hi][ji][ej][fj][gj][hj][jj][ck][dk][kk][al][bl][el][fl][kl][cm]AB[eb][fb][bc][cc][dc][hc][bd][fd][gd][jd][ge][he][le][ff][kf][cg][dg][ig][jg][ch][eh][jh][bi][di][ei][fi][gi][ii][bj][cj][dj][ij][ak][bk][ek][fk][gk][hk][ik][gl][jl]TR[kl]C[White is down on points so he must resort to drastic measures: he plays at L2 to limit the eyespace of, and kill, the marked black stones. How can black punish white?]PL[B]MA[ii][ij][ek][fk][gk][hk][ik][gl][jl]
(;B[hf]CR[hf]
(;W[fg]CR[fg]
(;B[hg]CR[hg]
(;W[ef]CR[ef]
;B[gh]LB[ff:A]CR[gh]C[Black successfully exploits the aji at A by creating a shortage of liberties for white. CHOICE RIGHT])
(;W[gh]CR[gh]
;B[ef]TR[ff]CR[ef]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT]))
(;B[gh]CR[gh]
;W[hg]CR[hg]
;B[ef]TR[ff]CR[ef]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT]))
(;W[hg]CR[hg]
;B[gh]CR[gh]
(;W[ef]CR[ef]
;B[fg]TR[ff]CR[fg]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT])
(;W[fg]CR[fg]
;B[ef]TR[ff]CR[ef]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT]))
(;W[gh]CR[gh]
;B[hg]CR[hg]
(;W[ef]CR[ef]
;B[fg]TR[ff]CR[fg]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT])
(;W[fg]CR[fg]
;B[ef]TR[ff]CR[ef]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT]))
(;W[ef]CR[ef]
(;B[hg]CR[hg]
(;W[fg]CR[fg]
;B[gh]LB[ff:A]CR[gh]C[Black successfully exploits the aji at A by creating a shortage of liberties for white. CHOICE RIGHT])
(;W[gh]CR[gh]
;B[fg]TR[ff]CR[fg]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT]))
(;B[gh]CR[gh]
(;W[hg]CR[hg]
;B[fg]TR[ff]CR[fg]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT])
(;W[fg]CR[fg]
;B[hg]LB[ff:A]CR[hg]C[Black successfully exploits the aji at A by creating a shortage of liberties for white. CHOICE RIGHT]))))
(;B[hg]CR[hg]
(;W[gh]CR[gh]
;B[hf]CR[hf]
(;W[fg]CR[fg]
;B[ef]TR[ff]CR[ef]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT])
(;W[ef]CR[ef]
;B[fg]TR[ff]CR[fg]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT]))
(;W[fg]CR[fg]
(;B[gh]TR[ff]CR[gh]C[White is forced to sacrifice to save the marked stones, due to the potential shortage of liberties created by black at F8. CHOICE RIGHT]MA[gf][eg][fg][gg][fh])
(;B[hf]CR[hf]
(;W[gh]CR[gh]
;B[ef]TR[ff]CR[ef]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT])
(;W[ef]CR[ef]
;B[gh]LB[ff:A]CR[gh]C[Black successfully exploits the aji at A by creating a shortage of liberties for white. CHOICE RIGHT]))))
(;B[gh]CR[gh]
(;W[hg]CR[hg]
(;B[fg]CR[fg]
;W[ef]CR[ef]
(;B[hf]TR[ff]CR[hf]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT])
(;B[fh]TR[ff]CR[fh]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. The marked stones are dead. CHOICE RIGHT]MA[gf][gg][hg][hh][ih][hi][ej][fj][gj][hj]))
(;B[hf]CR[hf]
(;W[ef]CR[ef]
;B[fg]TR[ff]CR[fg]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT])
(;W[fg]CR[fg]
;B[ef]TR[ff]CR[ef]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT])))
(;W[fg]CR[fg]
(;B[hg]TR[ff]CR[hg]C[White is forced to sacrifice to save the marked stones, due to the potential shortage of liberties created by black at F8. CHOICE RIGHT]MA[gf][eg][fg][gg][fh])
(;B[hf]CR[hf]
(;W[hg]CR[hg]
;B[ef]TR[ff]CR[ef]C[Black successfully exploits the aji of the stone at F8 by creating a shortage of liberties for white. CHOICE RIGHT])
(;W[ef]CR[ef]
;B[hg]LB[ff:A]CR[hg]C[Black successfully exploits the aji at A by creating a shortage of liberties for white. CHOICE RIGHT])))))