(;AW[qf]AW[pf]AW[of]AW[od]AW[oe]AB[lb]AW[ob]AB[pc]AB[pb]AB[qd]AB[qb]AW[rf]AB[rb]AW[qc]AW[rc]AW[pd]AB[rd]AW[hk]AW[ik]AW[jk]AW[kk]AB[ig]AW[oc]AW[ok]AW[pk]AB[pi]AB[rh]AB[qi]AW[ri]AB[oh]AW[rj]AW[qk]AW[qj]AW[oi]AW[nk]AW[nb]AB[kc]AB[jg]AW[hh]AW[hi]AW[hj]AB[mh]AW[mi]AW[mj]AB[jf]AB[je]AB[li]AB[lj]AB[lk]AW[kf]AW[kd]AW[lc]AB[jd]AB[jc]AW[lh]AB[ni]AW[oj]AW[mk]AB[ll]AW[mb]AW[mc]AB[kb]C[Black to play and solve this tricky thing. Consider the marked groups alive.]AW[qe]AW[oa]AW[ma]AB[pa]TR[jc]TR[ll]TR[rb]AP[goproblems]
(;B[mg]
(;W[lg]
(;B[lf]
(;W[mf];B[le];W[kh]
(;B[ji]C[Good! Black has four liberties and white has only three!CHOICERIGHT])
(;B[ii];W[jh];B[ih];W[ji])
(;B[me];W[ji];B[nf];W[ke]))
(;W[ke];B[kh];W[kg];B[ld]C[RIGHT])
(;W[le];B[mf];W[ke];B[kg];W[kh];B[ji]C[RIGHT]))
(;B[le];W[lf];B[mf];W[ke]))
(;W[kg];B[kh];W[lg];B[le]C[RIGHT]))
(;B[lg];W[kh]
(;B[mg];W[kg])
(;B[kg];W[mg];B[nh];W[ji])))