(;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.])))