(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2] RU[Japanese]SZ[19]KM[0.00] AW[mq][nq][hr][ir][kr][lr][nr][js]AB[hq][iq][jq][kq][lq][fr][gr][jr][mr]C[Save as many stones as possible.] (;W[is] ;B[gs] (;W[ms] ;B[hs] ;W[ks]C[RIGHT Well done.]) (;W[ks] ;B[hs] ;W[ms]C[RIGHT You achieved the objective, but N1 before L1 is usual, to leave a smaller ko threat from bH1.])) (;W[ms] ;B[hs] (;W[ks] ;B[is]C[You lost 2 stones, but you did keep sente.]) (;W[is] ;B[ks]C[Oops.])) (;W[ls] ;B[hs] ;W[ms] ;B[is] ;W[ks]C[You lost 2 stones needlessly.]) (;W[ks] ;B[hs] (;W[is] ;B[ls]C[Disaster!]) (;W[ls] ;B[is] ;W[ms]C[You lost 2 stones needlessly.]) (;W[ms] ;B[is]C[You lost 2 stones, but you did keep sente.])) (;W[hs] ;B[gs] (;W[ms] ;B[is] ;W[ks]C[You lost 3 stones needlessly.]) (;W[ks] ;B[is] ;W[ms]C[You lost 3 stones needlessly.]) (;W[ls] ;B[is] ;W[ms] ;B[ks]C[You lost 4 stones and left a ko, needlessly.])))