(;AW[dj]AW[ei]AW[fi]AW[gh]AW[hh]AW[ih]AW[jg]AW[kh]AW[lh]AW[mh]AW[ni]AW[oi]AW[pj]AW[ek]AW[fk]AW[gl]AW[hl]AW[il]AW[jm]AW[kl]AW[ll]AW[ml]AW[nk]AW[ok]AB[jh]AB[ji]AB[jk]AB[jl]AB[ii]AB[ij]AB[ik]AB[ki]AB[kj]AB[kk]AB[ch]AB[ck]AB[cl]AB[cj]AB[ci]AB[dg]AB[ef]AB[fe]AB[ge]AB[hd]AB[id]AB[jd]AB[kd]AB[ld]AB[me]AB[ne]AB[of]AB[qh]AB[qi]AB[qj]AB[qk]AB[ql]AB[pm]AB[on]AB[pg]AB[no]AB[mo]AB[lp]AB[kp]AB[jp]AB[ip]AB[hp]AB[go]AB[en]AB[dm]AB[fo]C[Is black marked group alive? Choose K18 (Y) for Yes and K2 (N) for No.FORCE]LB[jb:Y]LB[jr:N]MA[jh]MA[ji]MA[ii]MA[ij]MA[ik]MA[jk]MA[jl]MA[kk]MA[ki]MA[kj]AP[goproblems]
(;B[jr]C[Yep. He's only got one eye.RIGHT])
(;B[jb]C[No, he's only got one eye. Literally, of course, but also in go terms. Even though Black can cut White in two, each half has more libeties than the Black center group (just 7 there).]MA[jg]MA[ih]MA[hh]MA[gh]MA[fi]MA[ei]MA[dj]MA[ek]MA[fk]MA[gl]MA[hl]MA[il]MA[jm]MA[jl]MA[jk]MA[ik]MA[ij]MA[ii]MA[ji]MA[ki]MA[kj]MA[kk]MA[jh]MA[kl]MA[ll]MA[ml]MA[nk]MA[ok]MA[pj]MA[oi]MA[ni]MA[mh]MA[lh]MA[kh]))
