I am trying something new.
All suggestions and comments are welcome.
(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[19]KM[0.00]
;AW[ao][bo][co][cp][dp][ep][rp][fq][gq][hq][hr][mr][nr][or][pr][hs]AB[qo][ro][so][bp][op][pp][qp][bq][lq][mq][nq][dr][er][fr][gr][lr][ls]LB[rq:B][cr:A]C[If you think the left black group need another
stone to live play at A.
If you think the left black group is alredy alive play
at B.
]PL[B]
(;B[rq]
;W[cq]
(;B[cr]
;W[br]
(;B[ar]
;W[bs]
(;B[aq]
;W[ap]
(;B[cs]
;W[as]
;B[bq]C[RIGHT])
(;B[gs]
;W[cs]
;B[ds]
;W[as]
;B[bq]
;W[aq]
;B[ar]
;W[bs]
;B[br]C[RIGHT]))
(;B[cs]
;W[aq]C[Black dies.])
(;B[gs]
;W[aq]C[Black dies.]))
(;B[bs]
;W[ar]C[Black dies.])
(;B[cs]
;W[aq]C[Black dies.])
(;B[gs]
;W[aq]C[Black dies.]))
(;B[bs]
;W[cr]C[Black dies.])
(;B[br]CR[br]
;W[cr]CR[cr]
;B[cs]CR[cs]
;W[gs]CR[gs]C[Black has only one eye in the corner, and none at the edge.]))
(;B[cr]
;W[rq]C[Now the problem is for Black to kill the White
right group.]
(;B[qq]
;W[qr]
(;B[rr]
;W[sr]
(;B[rs]
;W[sq]
(;B[sp]
;W[qs]
;B[ss]CR[ss]
;W[rq]CR[rq]C[White lives.])
(;B[qs]
;W[ps]C[White lives.])
(;B[ms]
;W[ns]
(;B[qs]
;W[ps]C[White lives.])
(;B[sp]
;W[qs]
;B[ss]CR[ss]
;W[rq]CR[rq]C[White lives.])))
(;B[sq]
;W[rs]C[White lives.]))
(;B[sp]
;W[sr]C[White lives.])
(;B[sq]
;W[sr]C[White lives.])
(;B[sr]
;W[rr]C[White lives.])
(;B[rs]
;W[rr]C[White lives.])
(;B[ms]
;W[sr]C[White lives.]))
(;B[sp]
;W[qr]C[White lives.])
(;B[sq]
;W[rr]C[White lives.])
(;B[sr]
;W[rr]C[White lives.])
(;B[rr]
;W[qq]C[White lives.])
(;B[rs]
;W[rr]C[White lives.])
(;B[qr]
;W[qq]C[White lives.])
(;B[qs]
;W[qr]C[White lives.])))